Changeset 1629


Ignore:
Timestamp:
Mar 28, 2012, 9:01:47 AM (7 years ago)
Author:
julian.reschke@…
Message:
 
Location:
draft-ietf-httpbis/experiment
Files:
3 edited

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  • draft-ietf-httpbis/experiment/p1-messaging.html

    r1628 r1629  
    757757      <p id="rfc.section.1.p.1">The Hypertext Transfer Protocol (HTTP) is an application-level request/response protocol that uses extensible semantics and
    758758         MIME-like message payloads for flexible interaction with network-based hypertext information systems. HTTP relies upon the
    759          Uniform Resource Identifier (URI) standard <a href="#RFC3986" id="rfc.xref.RFC3986.1"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a> to indicate the target resource (<a href="#target-resource" title="Identifying a Target Resource">Section&nbsp;5.1</a>) and relationships between resources. Messages are passed in a format similar to that used by Internet mail <a href="#RFC5322" id="rfc.xref.RFC5322.1"><cite title="Internet Message Format">[RFC5322]</cite></a> and the Multipurpose Internet Mail Extensions (MIME) <a href="#RFC2045" id="rfc.xref.RFC2045.1"><cite title="Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies">[RFC2045]</cite></a> (see <a href="p2-semantics.html#differences.between.http.and.mime" title="Differences between HTTP and MIME">Appendix A</a> of <a href="#Part2" id="rfc.xref.Part2.1"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> for the differences between HTTP and MIME messages).
     759         Uniform Resource Identifier (URI) standard <a href="#RFC3986" id="rfc.xref.RFC3986.1"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a> to indicate the target resource (<a href="#target-resource" title="Identifying a Target Resource">Section&nbsp;5.1</a>) and relationships between resources. Messages are passed in a format similar to that used by Internet mail <a href="#RFC5322" id="rfc.xref.RFC5322.1"><cite title="Internet Message Format">[RFC5322]</cite></a> and the Multipurpose Internet Mail Extensions (MIME) <a href="#RFC2045" id="rfc.xref.RFC2045.1"><cite title="Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies">[RFC2045]</cite></a> (see <a href="p2-semantics.html#differences.between.http.and.mime" title="ERROR: Anchor 'differences.between.http.and.mime' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'differences.between.http.and.mime' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.1"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> for the differences between HTTP and MIME messages).
    760760      </p>
    761761      <p id="rfc.section.1.p.2">HTTP is a generic interface protocol for information systems. It is designed to hide the details of how a service is implemented
     
    910910         or an intranet-to-Internet privacy filter. Such transformations are presumed to be desired by the client (or client organization)
    911911         that selected the proxy and are beyond the scope of this specification. However, when a proxy is not intended to transform
    912          a given message, we use the term "<dfn>non-transforming proxy</dfn>" to target requirements that preserve HTTP message semantics. See <a href="p2-semantics.html#status.203" title="203 Non-Authoritative Information">Section 4.4.4</a> of <a href="#Part2" id="rfc.xref.Part2.2"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> and <a href="p6-cache.html#header.warning" title="Warning">Section 3.6</a> of <a href="#Part6" id="rfc.xref.Part6.1"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a> for status and warning codes related to transformations.
     912         a given message, we use the term "<dfn>non-transforming proxy</dfn>" to target requirements that preserve HTTP message semantics. See <a href="p2-semantics.html#status.203" title="ERROR: Anchor 'status.203' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.203' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.2"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> and <a href="p6-cache.html#header.warning" title="Warning">Section 3.6</a> of <a href="#Part6" id="rfc.xref.Part6.1"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a> for status and warning codes related to transformations.
    913913      </p>
    914914      <p id="rfc.section.2.3.p.7"><span id="rfc.iref.g.13"></span><span id="rfc.iref.r.4"></span>  <span id="rfc.iref.a.1"></span> A "<dfn>gateway</dfn>" (a.k.a., "<dfn>reverse proxy</dfn>") is a receiving agent that acts as a layer above some other server(s) and translates the received requests to the underlying
     
    10781078      </p>
    10791079      <p id="rfc.section.2.7.1.p.6">When an "http" URI is used within a context that calls for access to the indicated resource, a client <em class="bcp14">MAY</em> attempt access by resolving the host to an IP address, establishing a TCP connection to that address on the indicated port,
    1080          and sending an HTTP request message (<a href="#http.message" title="Message Format">Section&nbsp;3</a>) containing the URI's identifying data (<a href="#message.routing" title="Message Routing">Section&nbsp;5</a>) to the server. If the server responds to that request with a non-interim HTTP response message, as described in <a href="p2-semantics.html#status.code.and.reason.phrase" title="Status Code and Reason Phrase">Section 4</a> of <a href="#Part2" id="rfc.xref.Part2.3"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, then that response is considered an authoritative answer to the client's request.
     1080         and sending an HTTP request message (<a href="#http.message" title="Message Format">Section&nbsp;3</a>) containing the URI's identifying data (<a href="#message.routing" title="Message Routing">Section&nbsp;5</a>) to the server. If the server responds to that request with a non-interim HTTP response message, as described in <a href="p2-semantics.html#status.code.and.reason.phrase" title="ERROR: Anchor 'status.code.and.reason.phrase' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.code.and.reason.phrase' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.3"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, then that response is considered an authoritative answer to the client's request.
    10811081      </p>
    10821082      <p id="rfc.section.2.7.1.p.7">Although HTTP is independent of the transport protocol, the "http" scheme is specific to TCP-based services because the name
     
    11741174      </div>
    11751175      <div id="rfc.figure.u.14"></div><pre class="inline"><span id="rfc.iref.g.28"></span>  <a href="#method" class="smpl">method</a>         = <a href="#rule.token.separators" class="smpl">token</a>
    1176 </pre><p id="rfc.section.3.1.1.p.5">The methods defined by this specification can be found in <a href="p2-semantics.html#methods" title="Methods">Section 2</a> of <a href="#Part2" id="rfc.xref.Part2.4"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, along with information regarding the HTTP method registry and considerations for defining new methods.
     1176</pre><p id="rfc.section.3.1.1.p.5">The methods defined by this specification can be found in <a href="p2-semantics.html#methods" title="ERROR: Anchor 'methods' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'methods' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.4"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, along with information regarding the HTTP method registry and considerations for defining new methods.
    11771177      </p>
    11781178      <div id="rfc.iref.r.6"></div>
     
    11891189      <p id="rfc.section.3.1.1.p.9">HTTP does not place a pre-defined limit on the length of a request-line. A server that receives a method longer than any that
    11901190         it implements <em class="bcp14">SHOULD</em> respond with either a 405 (Not Allowed), if it is an origin server, or a 501 (Not Implemented) status code. A server <em class="bcp14">MUST</em> be prepared to receive URIs of unbounded length and respond with the 414 (URI Too Long) status code if the received request-target
    1191          would be longer than the server wishes to handle (see <a href="p2-semantics.html#status.414" title="414 URI Too Long">Section 4.6.12</a> of <a href="#Part2" id="rfc.xref.Part2.5"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
     1191         would be longer than the server wishes to handle (see <a href="p2-semantics.html#status.414" title="ERROR: Anchor 'status.414' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.414' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.5"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
    11921192      </p>
    11931193      <p id="rfc.section.3.1.1.p.10">Various ad-hoc limitations on request-line length are found in practice. It is <em class="bcp14">RECOMMENDED</em> that all HTTP senders and recipients support, at a minimum, request-line lengths of up to 8000 octets.
     
    11991199      <div id="rfc.figure.u.15"></div><pre class="inline"><span id="rfc.iref.g.29"></span>  <a href="#status.line" class="smpl">status-line</a> = <a href="#http.version" class="smpl">HTTP-version</a> <a href="#core.rules" class="smpl">SP</a> <a href="#status-code" class="smpl">status-code</a> <a href="#core.rules" class="smpl">SP</a> <a href="#reason-phrase" class="smpl">reason-phrase</a> <a href="#core.rules" class="smpl">CRLF</a>
    12001200</pre><div id="status-code">
    1201          <p id="rfc.section.3.1.2.p.3">The status-code element is a 3-digit integer result code of the attempt to understand and satisfy the request. See <a href="p2-semantics.html#status.code.and.reason.phrase" title="Status Code and Reason Phrase">Section 4</a> of <a href="#Part2" id="rfc.xref.Part2.6"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> for further information, such as the list of status codes defined by this specification, the IANA registry, and considerations
     1201         <p id="rfc.section.3.1.2.p.3">The status-code element is a 3-digit integer result code of the attempt to understand and satisfy the request. See <a href="p2-semantics.html#status.code.and.reason.phrase" title="ERROR: Anchor 'status.code.and.reason.phrase' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.code.and.reason.phrase' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.6"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> for further information, such as the list of status codes defined by this specification, the IANA registry, and considerations
    12021202            for new status codes.
    12031203         </p>
     
    12231223                 ; see <a href="#field.parsing" title="Field Parsing">Section&nbsp;3.2.2</a>
    12241224</pre><p id="rfc.section.3.2.p.3">The field-name token labels the corresponding field-value as having the semantics defined by that header field. For example,
    1225          the Date header field is defined in <a href="p2-semantics.html#header.date" title="Date">Section 11.2</a> of <a href="#Part2" id="rfc.xref.Part2.7"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> as containing the origination timestamp for the message in which it appears.
     1225         the Date header field is defined in <a href="p2-semantics.html#header.date" title="ERROR: Anchor 'header.date' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'header.date' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.7"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> as containing the origination timestamp for the message in which it appears.
    12261226      </p>
    12271227      <p id="rfc.section.3.2.p.4">HTTP header fields are fully extensible: there is no limit on the introduction of new field names, each presumably defining
     
    12311231         them.
    12321232      </p>
    1233       <p id="rfc.section.3.2.p.5">New HTTP header fields <em class="bcp14">SHOULD</em> be registered with IANA according to the procedures in <a href="p2-semantics.html#considerations.for.creating.header.fields" title="Considerations for Creating Header Fields">Section 3.1</a> of <a href="#Part2" id="rfc.xref.Part2.8"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>. Unrecognized header fields <em class="bcp14">MUST</em> be forwarded by a proxy unless the field-name is listed in the Connection header field (<a href="#header.connection" id="rfc.xref.header.connection.3" title="Connection">Section&nbsp;6.1</a>) or the proxy is specifically configured to block or otherwise transform such fields. Unrecognized header fields <em class="bcp14">SHOULD</em> be ignored by other recipients.
     1233      <p id="rfc.section.3.2.p.5">New HTTP header fields <em class="bcp14">SHOULD</em> be registered with IANA according to the procedures in <a href="p2-semantics.html#considerations.for.creating.header.fields" title="ERROR: Anchor 'considerations.for.creating.header.fields' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'considerations.for.creating.header.fields' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.8"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>. Unrecognized header fields <em class="bcp14">MUST</em> be forwarded by a proxy unless the field-name is listed in the Connection header field (<a href="#header.connection" id="rfc.xref.header.connection.3" title="Connection">Section&nbsp;6.1</a>) or the proxy is specifically configured to block or otherwise transform such fields. Unrecognized header fields <em class="bcp14">SHOULD</em> be ignored by other recipients.
    12341234      </p>
    12351235      <p id="rfc.section.3.2.p.6">The order in which header fields with differing field names are received is not significant. However, it is "good practice"
     
    14181418      <p id="rfc.section.3.3.1.p.6">If more than one Transfer-Encoding header field is present in a message, the multiple field-values <em class="bcp14">MUST</em> be combined into one field-value, according to the algorithm defined in <a href="#header.fields" title="Header Fields">Section&nbsp;3.2</a>, before determining the message body length.
    14191419      </p>
    1420       <p id="rfc.section.3.3.1.p.7">Unlike Content-Encoding (<a href="p2-semantics.html#content.codings" title="Content Codings">Section 7.2</a> of <a href="#Part2" id="rfc.xref.Part2.9"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>), Transfer-Encoding is a property of the message, not of the payload, and thus <em class="bcp14">MAY</em> be added or removed by any implementation along the request/response chain. Additional information about the encoding parameters <em class="bcp14">MAY</em> be provided by other header fields not defined by this specification.
     1420      <p id="rfc.section.3.3.1.p.7">Unlike Content-Encoding (<a href="p2-semantics.html#content.codings" title="ERROR: Anchor 'content.codings' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'content.codings' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.9"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>), Transfer-Encoding is a property of the message, not of the payload, and thus <em class="bcp14">MAY</em> be added or removed by any implementation along the request/response chain. Additional information about the encoding parameters <em class="bcp14">MAY</em> be provided by other header fields not defined by this specification.
    14211421      </p>
    14221422      <p id="rfc.section.3.3.1.p.8">Transfer-Encoding <em class="bcp14">MAY</em> be sent in a response to a HEAD request or in a 304 response to a GET request, neither of which includes a message body, to
     
    17251725      </p>
    17261726      <h3 id="rfc.section.4.3.1"><a href="#rfc.section.4.3.1">4.3.1</a>&nbsp;<a id="quality.values" href="#quality.values">Quality Values</a></h3>
    1727       <p id="rfc.section.4.3.1.p.1">Both transfer codings (TE request header field, <a href="#header.te" id="rfc.xref.header.te.3" title="TE">Section&nbsp;4.3</a>) and content negotiation (<a href="p2-semantics.html#content.negotiation" title="Content Negotiation">Section 10</a> of <a href="#Part2" id="rfc.xref.Part2.10"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) use short "floating point" numbers to indicate the relative importance ("weight") of various negotiable parameters. A weight
     1727      <p id="rfc.section.4.3.1.p.1">Both transfer codings (TE request header field, <a href="#header.te" id="rfc.xref.header.te.3" title="TE">Section&nbsp;4.3</a>) and content negotiation (<a href="p2-semantics.html#content.negotiation" title="ERROR: Anchor 'content.negotiation' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'content.negotiation' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.10"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) use short "floating point" numbers to indicate the relative importance ("weight") of various negotiable parameters. A weight
    17281728         is normalized to a real number in the range 0 through 1, where 0 is the minimum and 1 the maximum value. If a parameter has
    17291729         a quality value of 0, then content with this parameter is "not acceptable" for the client. HTTP/1.1 applications <em class="bcp14">MUST NOT</em> generate more than three digits after the decimal point. User configuration of these values <em class="bcp14">SHOULD</em> also be limited in this fashion.
     
    18261826      </p>
    18271827      <div id="authority-form">
    1828          <p id="rfc.section.5.3.p.13"><span id="rfc.iref.a.3"></span> The authority-form of request-target is only used for CONNECT requests (<a href="p2-semantics.html#CONNECT" title="CONNECT">Section 2.3.8</a> of <a href="#Part2" id="rfc.xref.Part2.12"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). When making a CONNECT request to establish a tunnel through one or more proxies, a client <em class="bcp14">MUST</em> send only the target URI's authority component (excluding any userinfo) as the request-target. For example,
     1828         <p id="rfc.section.5.3.p.13"><span id="rfc.iref.a.3"></span> The authority-form of request-target is only used for CONNECT requests (<a href="p2-semantics.html#CONNECT" title="ERROR: Anchor 'CONNECT' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'CONNECT' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.12"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). When making a CONNECT request to establish a tunnel through one or more proxies, a client <em class="bcp14">MUST</em> send only the target URI's authority component (excluding any userinfo) as the request-target. For example,
    18291829         </p>
    18301830      </div>
    18311831      <div id="rfc.figure.u.49"></div><pre class="text2">CONNECT www.example.com:80 HTTP/1.1
    18321832</pre><div id="asterisk-form">
    1833          <p id="rfc.section.5.3.p.15"><span id="rfc.iref.a.4"></span> The asterisk-form of request-target is only used for a server-wide OPTIONS request (<a href="p2-semantics.html#OPTIONS" title="OPTIONS">Section 2.3.1</a> of <a href="#Part2" id="rfc.xref.Part2.13"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). When a client wishes to request OPTIONS for the server as a whole, as opposed to a specific named resource of that server,
     1833         <p id="rfc.section.5.3.p.15"><span id="rfc.iref.a.4"></span> The asterisk-form of request-target is only used for a server-wide OPTIONS request (<a href="p2-semantics.html#OPTIONS" title="ERROR: Anchor 'OPTIONS' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'OPTIONS' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.13"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). When a client wishes to request OPTIONS for the server as a whole, as opposed to a specific named resource of that server,
    18341834            the client <em class="bcp14">MUST</em> send only "*" (%x2A) as the request-target. For example,
    18351835         </p>
     
    19921992         messages. Hence, it relies on the order of response arrival to correspond exactly to the order in which requests are made
    19931993         on the same connection. More than one response message per request only occurs when one or more informational responses (1xx,
    1994          see <a href="p2-semantics.html#status.1xx" title="Informational 1xx">Section 4.3</a> of <a href="#Part2" id="rfc.xref.Part2.15"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) precede a final response to the same request.
     1994         see <a href="p2-semantics.html#status.1xx" title="ERROR: Anchor 'status.1xx' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.1xx' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.15"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) precede a final response to the same request.
    19951995      </p>
    19961996      <p id="rfc.section.5.7.p.2">A client that uses persistent connections and sends more than one request per connection <em class="bcp14">MUST</em> maintain a list of outstanding requests in the order sent on that connection and <em class="bcp14">MUST</em> associate each received response message to the highest ordered request that has not yet received a final (non-1xx) response.
     
    21372137      <p id="rfc.section.6.3.2.2.p.2">Clients which assume persistent connections and pipeline immediately after connection establishment <em class="bcp14">SHOULD</em> be prepared to retry their connection if the first pipelined attempt fails. If a client does such a retry, it <em class="bcp14">MUST NOT</em> pipeline before it knows the connection is persistent. Clients <em class="bcp14">MUST</em> also be prepared to resend their requests if the server closes the connection before sending all of the corresponding responses.
    21382138      </p>
    2139       <p id="rfc.section.6.3.2.2.p.3">Clients <em class="bcp14">SHOULD NOT</em> pipeline requests using non-idempotent request methods or non-idempotent sequences of request methods (see <a href="p2-semantics.html#idempotent.methods" title="Idempotent Methods">Section 2.1.2</a> of <a href="#Part2" id="rfc.xref.Part2.16"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). Otherwise, a premature termination of the transport connection could lead to indeterminate results. A client wishing to
     2139      <p id="rfc.section.6.3.2.2.p.3">Clients <em class="bcp14">SHOULD NOT</em> pipeline requests using non-idempotent request methods or non-idempotent sequences of request methods (see <a href="p2-semantics.html#idempotent.methods" title="ERROR: Anchor 'idempotent.methods' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'idempotent.methods' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.16"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). Otherwise, a premature termination of the transport connection could lead to indeterminate results. A client wishing to
    21402140         send a non-idempotent request <em class="bcp14">SHOULD</em> wait to send that request until it has received the response status line for the previous request.
    21412141      </p>
     
    21672167      <h3 id="rfc.section.6.3.4"><a href="#rfc.section.6.3.4">6.3.4</a>&nbsp;<a id="persistent.retrying.requests" href="#persistent.retrying.requests">Retrying Requests</a></h3>
    21682168      <p id="rfc.section.6.3.4.p.1">Senders can close the transport connection at any time. Therefore, clients, servers, and proxies <em class="bcp14">MUST</em> be able to recover from asynchronous close events. Client software <em class="bcp14">MAY</em> reopen the transport connection and retransmit the aborted sequence of requests without user interaction so long as the request
    2169          sequence is idempotent (see <a href="p2-semantics.html#idempotent.methods" title="Idempotent Methods">Section 2.1.2</a> of <a href="#Part2" id="rfc.xref.Part2.17"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). Non-idempotent request methods or sequences <em class="bcp14">MUST NOT</em> be automatically retried, although user agents <em class="bcp14">MAY</em> offer a human operator the choice of retrying the request(s). Confirmation by user-agent software with semantic understanding
     2169         sequence is idempotent (see <a href="p2-semantics.html#idempotent.methods" title="ERROR: Anchor 'idempotent.methods' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'idempotent.methods' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.17"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). Non-idempotent request methods or sequences <em class="bcp14">MUST NOT</em> be automatically retried, although user agents <em class="bcp14">MAY</em> offer a human operator the choice of retrying the request(s). Confirmation by user-agent software with semantic understanding
    21702170         of the application <em class="bcp14">MAY</em> substitute for user confirmation. The automatic retry <em class="bcp14">SHOULD NOT</em> be repeated if the second sequence of requests fails.
    21712171      </p>
     
    21802180      </p>
    21812181      <h3 id="rfc.section.6.4.3"><a href="#rfc.section.6.4.3">6.4.3</a>&nbsp;<a id="use.of.the.100.status" href="#use.of.the.100.status">Use of the 100 (Continue) Status</a></h3>
    2182       <p id="rfc.section.6.4.3.p.1">The purpose of the 100 (Continue) status code (see <a href="p2-semantics.html#status.100" title="100 Continue">Section 4.3.1</a> of <a href="#Part2" id="rfc.xref.Part2.18"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) is to allow a client that is sending a request message with a request body to determine if the origin server is willing
     2182      <p id="rfc.section.6.4.3.p.1">The purpose of the 100 (Continue) status code (see <a href="p2-semantics.html#status.100" title="ERROR: Anchor 'status.100' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.100' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.18"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) is to allow a client that is sending a request message with a request body to determine if the origin server is willing
    21832183         to accept the request (based on the request header fields) before the client sends the request body. In some cases, it might
    21842184         either be inappropriate or highly inefficient for the client to send the body if the server will reject the message without
     
    21872187      <p id="rfc.section.6.4.3.p.2">Requirements for HTTP/1.1 clients: </p>
    21882188      <ul>
    2189          <li>If a client will wait for a 100 (Continue) response before sending the request body, it <em class="bcp14">MUST</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="Expect">Section 11.3</a> of <a href="#Part2" id="rfc.xref.Part2.19"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) with the "100-continue" expectation.
    2190          </li>
    2191          <li>A client <em class="bcp14">MUST NOT</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="Expect">Section 11.3</a> of <a href="#Part2" id="rfc.xref.Part2.20"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) with the "100-continue" expectation if it does not intend to send a request body.
     2189         <li>If a client will wait for a 100 (Continue) response before sending the request body, it <em class="bcp14">MUST</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="ERROR: Anchor 'header.expect' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'header.expect' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.19"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) with the "100-continue" expectation.
     2190         </li>
     2191         <li>A client <em class="bcp14">MUST NOT</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="ERROR: Anchor 'header.expect' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'header.expect' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.20"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) with the "100-continue" expectation if it does not intend to send a request body.
    21922192         </li>
    21932193      </ul>
     
    22332233         <li>A proxy <em class="bcp14">MUST NOT</em> forward a 100 (Continue) response if the request message was received from an HTTP/1.0 (or earlier) client and did not include
    22342234            an Expect header field with the "100-continue" expectation. This requirement overrides the general rule for forwarding of
    2235             1xx responses (see <a href="p2-semantics.html#status.1xx" title="Informational 1xx">Section 4.3</a> of <a href="#Part2" id="rfc.xref.Part2.21"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
     2235            1xx responses (see <a href="p2-semantics.html#status.1xx" title="ERROR: Anchor 'status.1xx' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.1xx' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.21"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
    22362236         </li>
    22372237      </ul>
     
    22702270      </p>
    22712271      <p id="rfc.section.6.5.p.8">The Upgrade header field cannot be used to indicate a switch to a protocol on a different connection. For that purpose, it
    2272          is more appropriate to use a 3xx redirection response (<a href="p2-semantics.html#status.3xx" title="Redirection 3xx">Section 4.5</a> of <a href="#Part2" id="rfc.xref.Part2.22"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
     2272         is more appropriate to use a 3xx redirection response (<a href="p2-semantics.html#status.3xx" title="ERROR: Anchor 'status.3xx' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.3xx' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.22"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
    22732273      </p>
    22742274      <p id="rfc.section.6.5.p.9">Servers <em class="bcp14">MUST</em> include the "Upgrade" header field in 101 (Switching Protocols) responses to indicate which protocol(s) are being switched
     
    25342534         <li>Pointer to specification text</li>
    25352535      </ul>
    2536       <p id="rfc.section.7.4.p.3">Names of transfer codings <em class="bcp14">MUST NOT</em> overlap with names of content codings (<a href="p2-semantics.html#content.codings" title="Content Codings">Section 7.2</a> of <a href="#Part2" id="rfc.xref.Part2.23"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) unless the encoding transformation is identical, as it is the case for the compression codings defined in <a href="#compression.codings" title="Compression Codings">Section&nbsp;4.2</a>.
     2536      <p id="rfc.section.7.4.p.3">Names of transfer codings <em class="bcp14">MUST NOT</em> overlap with names of content codings (<a href="p2-semantics.html#content.codings" title="ERROR: Anchor 'content.codings' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'content.codings' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.23"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) unless the encoding transformation is identical, as it is the case for the compression codings defined in <a href="#compression.codings" title="Compression Codings">Section&nbsp;4.2</a>.
    25372537      </p>
    25382538      <p id="rfc.section.7.4.p.4">Values to be added to this name space require IETF Review (see <a href="http://tools.ietf.org/html/rfc5226#section-4.1">Section 4.1</a> of <a href="#RFC5226" id="rfc.xref.RFC5226.1"><cite title="Guidelines for Writing an IANA Considerations Section in RFCs">[RFC5226]</cite></a>), and <em class="bcp14">MUST</em> conform to the purpose of transfer coding defined in this section.
     
    26942694         that most implementations will choose substantially higher limits.
    26952695      </p>
    2696       <p id="rfc.section.8.6.p.3">This specification also provides a way for servers to reject messages that have request-targets that are too long (<a href="p2-semantics.html#status.414" title="414 URI Too Long">Section 4.6.12</a> of <a href="#Part2" id="rfc.xref.Part2.24"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) or request entities that are too large (<a href="p2-semantics.html#status.4xx" title="Client Error 4xx">Section 4.6</a> of <a href="#Part2" id="rfc.xref.Part2.25"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
     2696      <p id="rfc.section.8.6.p.3">This specification also provides a way for servers to reject messages that have request-targets that are too long (<a href="p2-semantics.html#status.414" title="ERROR: Anchor 'status.414' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.414' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.24"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) or request entities that are too large (<a href="p2-semantics.html#status.4xx" title="ERROR: Anchor 'status.4xx' not found in p2-semantics.xml.">Appendix ERROR: Anchor 'status.4xx' in Part2 not found in source file 'p2-semantics.xml'.</a> of <a href="#Part2" id="rfc.xref.Part2.25"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
    26972697      </p>
    26982698      <p id="rfc.section.8.6.p.4">Other fields (including but not limited to request methods, response status phrases, header field-names, and body chunks) <em class="bcp14">SHOULD</em> be limited by implementations carefully, so as to not impede interoperability.
     
    37463746                  <li><em>Pad1995</em>&nbsp;&nbsp;<a href="#rfc.xref.Pad1995.1">6.3.1</a>, <a href="#Pad1995"><b>10.2</b></a></li>
    37473747                  <li><em>Part2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">1</a>, <a href="#rfc.xref.Part2.2">2.3</a>, <a href="#rfc.xref.Part2.3">2.7.1</a>, <a href="#rfc.xref.Part2.4">3.1.1</a>, <a href="#rfc.xref.Part2.5">3.1.1</a>, <a href="#rfc.xref.Part2.6">3.1.2</a>, <a href="#rfc.xref.Part2.7">3.2</a>, <a href="#rfc.xref.Part2.8">3.2</a>, <a href="#rfc.xref.Part2.9">3.3.1</a>, <a href="#rfc.xref.Part2.10">4.3.1</a>, <a href="#rfc.xref.Part2.11">5.1</a>, <a href="#rfc.xref.Part2.12">5.3</a>, <a href="#rfc.xref.Part2.13">5.3</a>, <a href="#rfc.xref.Part2.14">5.6.2</a>, <a href="#rfc.xref.Part2.15">5.7</a>, <a href="#rfc.xref.Part2.16">6.3.2.2</a>, <a href="#rfc.xref.Part2.17">6.3.4</a>, <a href="#rfc.xref.Part2.18">6.4.3</a>, <a href="#rfc.xref.Part2.19">6.4.3</a>, <a href="#rfc.xref.Part2.20">6.4.3</a>, <a href="#rfc.xref.Part2.21">6.4.3</a>, <a href="#rfc.xref.Part2.22">6.5</a>, <a href="#rfc.xref.Part2.23">7.4</a>, <a href="#rfc.xref.Part2.24">8.6</a>, <a href="#rfc.xref.Part2.25">8.6</a>, <a href="#Part2"><b>10.1</b></a><ul>
    3748                         <li><em>Section 2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.4">3.1.1</a></li>
    3749                         <li><em>Section 2.1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.16">6.3.2.2</a>, <a href="#rfc.xref.Part2.17">6.3.4</a></li>
    3750                         <li><em>Section 2.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.13">5.3</a></li>
    3751                         <li><em>Section 2.3.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.12">5.3</a></li>
    3752                         <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.8">3.2</a></li>
    3753                         <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.3">2.7.1</a>, <a href="#rfc.xref.Part2.6">3.1.2</a></li>
    3754                         <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.15">5.7</a>, <a href="#rfc.xref.Part2.21">6.4.3</a></li>
    3755                         <li><em>Section 4.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.18">6.4.3</a></li>
    3756                         <li><em>Section 4.4.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.2">2.3</a></li>
    3757                         <li><em>Section 4.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.22">6.5</a></li>
    3758                         <li><em>Section 4.6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.25">8.6</a></li>
    3759                         <li><em>Section 4.6.12</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.5">3.1.1</a>, <a href="#rfc.xref.Part2.24">8.6</a></li>
    3760                         <li><em>Section 7.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.9">3.3.1</a>, <a href="#rfc.xref.Part2.23">7.4</a></li>
    3761                         <li><em>Section 10</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.10">4.3.1</a></li>
    3762                         <li><em>Section 11.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.7">3.2</a></li>
    3763                         <li><em>Section 11.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.19">6.4.3</a>, <a href="#rfc.xref.Part2.20">6.4.3</a></li>
    3764                         <li><em>Appendix A</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">1</a></li>
     3748                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">1</a></li>
     3749                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.2">2.3</a></li>
     3750                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.3">2.7.1</a>, <a href="#rfc.xref.Part2.6">3.1.2</a></li>
     3751                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.4">3.1.1</a></li>
     3752                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.5">3.1.1</a>, <a href="#rfc.xref.Part2.24">8.6</a></li>
     3753                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.7">3.2</a></li>
     3754                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.8">3.2</a></li>
     3755                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.9">3.3.1</a>, <a href="#rfc.xref.Part2.23">7.4</a></li>
     3756                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.10">4.3.1</a></li>
     3757                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.12">5.3</a></li>
     3758                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.13">5.3</a></li>
     3759                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.15">5.7</a>, <a href="#rfc.xref.Part2.21">6.4.3</a></li>
     3760                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.16">6.3.2.2</a>, <a href="#rfc.xref.Part2.17">6.3.4</a></li>
     3761                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.18">6.4.3</a></li>
     3762                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.19">6.4.3</a>, <a href="#rfc.xref.Part2.20">6.4.3</a></li>
     3763                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.22">6.5</a></li>
     3764                        <li><em>Appendix </em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.25">8.6</a></li>
    37653765                     </ul>
    37663766                  </li>
  • draft-ietf-httpbis/experiment/p2-semantics.html

    r1627 r1629  
    488488      <link rel="Chapter" title="5 Representation" href="#rfc.section.5">
    489489      <link rel="Chapter" title="6 Common Protocol Parameters" href="#rfc.section.6">
    490       <link rel="Chapter" title="7 Protocol Parameters" href="#rfc.section.7">
    491       <link rel="Chapter" title="8 Payload" href="#rfc.section.8">
    492       <link rel="Chapter" title="9 Representation" href="#rfc.section.9">
    493       <link rel="Chapter" title="10 Content Negotiation" href="#rfc.section.10">
    494       <link rel="Chapter" title="11 Header Field Definitions" href="#rfc.section.11">
    495       <link rel="Chapter" title="12 IANA Considerations" href="#rfc.section.12">
    496       <link rel="Chapter" title="13 Security Considerations" href="#rfc.section.13">
    497       <link rel="Chapter" title="14 Acknowledgments" href="#rfc.section.14">
    498       <link rel="Chapter" href="#rfc.section.15" title="15 References">
     490      <link rel="Chapter" title="7 Payload" href="#rfc.section.7">
     491      <link rel="Chapter" title="8 Representation" href="#rfc.section.8">
     492      <link rel="Chapter" title="9 Content Negotiation" href="#rfc.section.9">
     493      <link rel="Chapter" title="10 Header Field Definitions" href="#rfc.section.10">
     494      <link rel="Chapter" title="11 IANA Considerations" href="#rfc.section.11">
     495      <link rel="Chapter" title="12 Security Considerations" href="#rfc.section.12">
     496      <link rel="Chapter" title="13 Acknowledgments" href="#rfc.section.13">
     497      <link rel="Chapter" href="#rfc.section.14" title="14 References">
    499498      <link rel="Appendix" title="A Differences between HTTP and MIME" href="#rfc.section.A">
    500499      <link rel="Appendix" title="B Additional Features" href="#rfc.section.B">
     
    699698               <li>6.1&nbsp;&nbsp;&nbsp;<a href="#http.date">Date/Time Formats</a></li>
    700699               <li>6.2&nbsp;&nbsp;&nbsp;<a href="#product.tokens">Product Tokens</a></li>
    701             </ul>
    702          </li>
    703          <li>7.&nbsp;&nbsp;&nbsp;<a href="#protocol.parameters">Protocol Parameters</a><ul>
    704                <li>7.1&nbsp;&nbsp;&nbsp;<a href="#character.sets">Character Encodings (charset)</a></li>
    705                <li>7.2&nbsp;&nbsp;&nbsp;<a href="#content.codings">Content Codings</a><ul>
    706                      <li>7.2.1&nbsp;&nbsp;&nbsp;<a href="#content.coding.registry">Content Coding Registry</a></li>
     700               <li>6.3&nbsp;&nbsp;&nbsp;<a href="#character.sets">Character Encodings (charset)</a></li>
     701               <li>6.4&nbsp;&nbsp;&nbsp;<a href="#content.codings">Content Codings</a><ul>
     702                     <li>6.4.1&nbsp;&nbsp;&nbsp;<a href="#content.coding.registry">Content Coding Registry</a></li>
    707703                  </ul>
    708704               </li>
    709                <li>7.3&nbsp;&nbsp;&nbsp;<a href="#media.types">Media Types</a><ul>
    710                      <li>7.3.1&nbsp;&nbsp;&nbsp;<a href="#canonicalization.and.text.defaults">Canonicalization and Text Defaults</a></li>
    711                      <li>7.3.2&nbsp;&nbsp;&nbsp;<a href="#multipart.types">Multipart Types</a></li>
     705               <li>6.5&nbsp;&nbsp;&nbsp;<a href="#media.types">Media Types</a><ul>
     706                     <li>6.5.1&nbsp;&nbsp;&nbsp;<a href="#canonicalization.and.text.defaults">Canonicalization and Text Defaults</a></li>
     707                     <li>6.5.2&nbsp;&nbsp;&nbsp;<a href="#multipart.types">Multipart Types</a></li>
    712708                  </ul>
    713709               </li>
    714                <li>7.4&nbsp;&nbsp;&nbsp;<a href="#language.tags">Language Tags</a></li>
     710               <li>6.6&nbsp;&nbsp;&nbsp;<a href="#language.tags">Language Tags</a></li>
    715711            </ul>
    716712         </li>
    717          <li>8.&nbsp;&nbsp;&nbsp;<a href="#payload">Payload</a><ul>
    718                <li>8.1&nbsp;&nbsp;&nbsp;<a href="#payload.header.fields">Payload Header Fields</a></li>
    719                <li>8.2&nbsp;&nbsp;&nbsp;<a href="#payload.body">Payload Body</a></li>
     713         <li>7.&nbsp;&nbsp;&nbsp;<a href="#payload">Payload</a><ul>
     714               <li>7.1&nbsp;&nbsp;&nbsp;<a href="#payload.header.fields">Payload Header Fields</a></li>
     715               <li>7.2&nbsp;&nbsp;&nbsp;<a href="#payload.body">Payload Body</a></li>
    720716            </ul>
    721717         </li>
    722          <li>9.&nbsp;&nbsp;&nbsp;<a href="#representation-TODO">Representation</a><ul>
    723                <li>9.1&nbsp;&nbsp;&nbsp;<a href="#representation.header.fields">Representation Header Fields</a></li>
    724                <li>9.2&nbsp;&nbsp;&nbsp;<a href="#representation.data">Representation Data</a></li>
     718         <li>8.&nbsp;&nbsp;&nbsp;<a href="#representation-TODO">Representation</a><ul>
     719               <li>8.1&nbsp;&nbsp;&nbsp;<a href="#representation.header.fields">Representation Header Fields</a></li>
     720               <li>8.2&nbsp;&nbsp;&nbsp;<a href="#representation.data">Representation Data</a></li>
    725721            </ul>
    726722         </li>
    727          <li>10.&nbsp;&nbsp;&nbsp;<a href="#content.negotiation">Content Negotiation</a><ul>
    728                <li>10.1&nbsp;&nbsp;&nbsp;<a href="#server-driven.negotiation">Server-driven Negotiation</a></li>
    729                <li>10.2&nbsp;&nbsp;&nbsp;<a href="#agent-driven.negotiation">Agent-driven Negotiation</a></li>
     723         <li>9.&nbsp;&nbsp;&nbsp;<a href="#content.negotiation">Content Negotiation</a><ul>
     724               <li>9.1&nbsp;&nbsp;&nbsp;<a href="#server-driven.negotiation">Server-driven Negotiation</a></li>
     725               <li>9.2&nbsp;&nbsp;&nbsp;<a href="#agent-driven.negotiation">Agent-driven Negotiation</a></li>
    730726            </ul>
    731727         </li>
    732          <li>11.&nbsp;&nbsp;&nbsp;<a href="#header.field.definitions">Header Field Definitions</a><ul>
    733                <li>11.1&nbsp;&nbsp;&nbsp;<a href="#header.allow">Allow</a></li>
    734                <li>11.2&nbsp;&nbsp;&nbsp;<a href="#header.date">Date</a></li>
    735                <li>11.3&nbsp;&nbsp;&nbsp;<a href="#header.expect">Expect</a></li>
    736                <li>11.4&nbsp;&nbsp;&nbsp;<a href="#header.from">From</a></li>
    737                <li>11.5&nbsp;&nbsp;&nbsp;<a href="#header.location">Location</a></li>
    738                <li>11.6&nbsp;&nbsp;&nbsp;<a href="#header.max-forwards">Max-Forwards</a></li>
    739                <li>11.7&nbsp;&nbsp;&nbsp;<a href="#header.referer">Referer</a></li>
    740                <li>11.8&nbsp;&nbsp;&nbsp;<a href="#header.retry-after">Retry-After</a></li>
    741                <li>11.9&nbsp;&nbsp;&nbsp;<a href="#header.server">Server</a></li>
    742                <li>11.10&nbsp;&nbsp;&nbsp;<a href="#header.user-agent">User-Agent</a></li>
    743                <li>11.11&nbsp;&nbsp;&nbsp;<a href="#header.accept">Accept</a></li>
    744                <li>11.12&nbsp;&nbsp;&nbsp;<a href="#header.accept-charset">Accept-Charset</a></li>
    745                <li>11.13&nbsp;&nbsp;&nbsp;<a href="#header.accept-encoding">Accept-Encoding</a></li>
    746                <li>11.14&nbsp;&nbsp;&nbsp;<a href="#header.accept-language">Accept-Language</a></li>
    747                <li>11.15&nbsp;&nbsp;&nbsp;<a href="#header.content-encoding">Content-Encoding</a></li>
    748                <li>11.16&nbsp;&nbsp;&nbsp;<a href="#header.content-language">Content-Language</a></li>
    749                <li>11.17&nbsp;&nbsp;&nbsp;<a href="#header.content-location">Content-Location</a></li>
    750                <li>11.18&nbsp;&nbsp;&nbsp;<a href="#header.content-type">Content-Type</a></li>
     728         <li>10.&nbsp;&nbsp;&nbsp;<a href="#header.field.definitions">Header Field Definitions</a><ul>
     729               <li>10.1&nbsp;&nbsp;&nbsp;<a href="#header.allow">Allow</a></li>
     730               <li>10.2&nbsp;&nbsp;&nbsp;<a href="#header.date">Date</a></li>
     731               <li>10.3&nbsp;&nbsp;&nbsp;<a href="#header.expect">Expect</a></li>
     732               <li>10.4&nbsp;&nbsp;&nbsp;<a href="#header.from">From</a></li>
     733               <li>10.5&nbsp;&nbsp;&nbsp;<a href="#header.location">Location</a></li>
     734               <li>10.6&nbsp;&nbsp;&nbsp;<a href="#header.max-forwards">Max-Forwards</a></li>
     735               <li>10.7&nbsp;&nbsp;&nbsp;<a href="#header.referer">Referer</a></li>
     736               <li>10.8&nbsp;&nbsp;&nbsp;<a href="#header.retry-after">Retry-After</a></li>
     737               <li>10.9&nbsp;&nbsp;&nbsp;<a href="#header.server">Server</a></li>
     738               <li>10.10&nbsp;&nbsp;&nbsp;<a href="#header.user-agent">User-Agent</a></li>
     739               <li>10.11&nbsp;&nbsp;&nbsp;<a href="#header.accept">Accept</a></li>
     740               <li>10.12&nbsp;&nbsp;&nbsp;<a href="#header.accept-charset">Accept-Charset</a></li>
     741               <li>10.13&nbsp;&nbsp;&nbsp;<a href="#header.accept-encoding">Accept-Encoding</a></li>
     742               <li>10.14&nbsp;&nbsp;&nbsp;<a href="#header.accept-language">Accept-Language</a></li>
     743               <li>10.15&nbsp;&nbsp;&nbsp;<a href="#header.content-encoding">Content-Encoding</a></li>
     744               <li>10.16&nbsp;&nbsp;&nbsp;<a href="#header.content-language">Content-Language</a></li>
     745               <li>10.17&nbsp;&nbsp;&nbsp;<a href="#header.content-location">Content-Location</a></li>
     746               <li>10.18&nbsp;&nbsp;&nbsp;<a href="#header.content-type">Content-Type</a></li>
    751747            </ul>
    752748         </li>
    753          <li>12.&nbsp;&nbsp;&nbsp;<a href="#IANA.considerations">IANA Considerations</a><ul>
    754                <li>12.1&nbsp;&nbsp;&nbsp;<a href="#method.registration">Method Registry</a></li>
    755                <li>12.2&nbsp;&nbsp;&nbsp;<a href="#status.code.registration">Status Code Registry</a></li>
    756                <li>12.3&nbsp;&nbsp;&nbsp;<a href="#header.field.registration">Header Field Registration</a></li>
    757                <li>12.4&nbsp;&nbsp;&nbsp;<a href="#content.coding.registration">Content Coding Registry</a></li>
     749         <li>11.&nbsp;&nbsp;&nbsp;<a href="#IANA.considerations">IANA Considerations</a><ul>
     750               <li>11.1&nbsp;&nbsp;&nbsp;<a href="#method.registration">Method Registry</a></li>
     751               <li>11.2&nbsp;&nbsp;&nbsp;<a href="#status.code.registration">Status Code Registry</a></li>
     752               <li>11.3&nbsp;&nbsp;&nbsp;<a href="#header.field.registration">Header Field Registration</a></li>
     753               <li>11.4&nbsp;&nbsp;&nbsp;<a href="#content.coding.registration">Content Coding Registry</a></li>
    758754            </ul>
    759755         </li>
    760          <li>13.&nbsp;&nbsp;&nbsp;<a href="#security.considerations">Security Considerations</a><ul>
    761                <li>13.1&nbsp;&nbsp;&nbsp;<a href="#security.sensitive">Transfer of Sensitive Information</a></li>
    762                <li>13.2&nbsp;&nbsp;&nbsp;<a href="#encoding.sensitive.information.in.uris">Encoding Sensitive Information in URIs</a></li>
    763                <li>13.3&nbsp;&nbsp;&nbsp;<a href="#location.spoofing-leakage">Location Header Fields: Spoofing and Information Leakage</a></li>
    764                <li>13.4&nbsp;&nbsp;&nbsp;<a href="#rfc.section.13.4">Security Considerations for CONNECT</a></li>
    765                <li>13.5&nbsp;&nbsp;&nbsp;<a href="#privacy.issues.connected.to.accept.header.fields">Privacy Issues Connected to Accept Header Fields</a></li>
     756         <li>12.&nbsp;&nbsp;&nbsp;<a href="#security.considerations">Security Considerations</a><ul>
     757               <li>12.1&nbsp;&nbsp;&nbsp;<a href="#security.sensitive">Transfer of Sensitive Information</a></li>
     758               <li>12.2&nbsp;&nbsp;&nbsp;<a href="#encoding.sensitive.information.in.uris">Encoding Sensitive Information in URIs</a></li>
     759               <li>12.3&nbsp;&nbsp;&nbsp;<a href="#location.spoofing-leakage">Location Header Fields: Spoofing and Information Leakage</a></li>
     760               <li>12.4&nbsp;&nbsp;&nbsp;<a href="#rfc.section.12.4">Security Considerations for CONNECT</a></li>
     761               <li>12.5&nbsp;&nbsp;&nbsp;<a href="#privacy.issues.connected.to.accept.header.fields">Privacy Issues Connected to Accept Header Fields</a></li>
    766762            </ul>
    767763         </li>
    768          <li>14.&nbsp;&nbsp;&nbsp;<a href="#acks">Acknowledgments</a></li>
    769          <li>15.&nbsp;&nbsp;&nbsp;<a href="#rfc.references">References</a><ul>
    770                <li>15.1&nbsp;&nbsp;&nbsp;<a href="#rfc.references.1">Normative References</a></li>
    771                <li>15.2&nbsp;&nbsp;&nbsp;<a href="#rfc.references.2">Informative References</a></li>
     764         <li>13.&nbsp;&nbsp;&nbsp;<a href="#acks">Acknowledgments</a></li>
     765         <li>14.&nbsp;&nbsp;&nbsp;<a href="#rfc.references">References</a><ul>
     766               <li>14.1&nbsp;&nbsp;&nbsp;<a href="#rfc.references.1">Normative References</a></li>
     767               <li>14.2&nbsp;&nbsp;&nbsp;<a href="#rfc.references.2">Informative References</a></li>
    772768            </ul>
    773769         </li>
     
    909905      </p>
    910906      <div id="rfc.figure.u.3"></div><pre class="inline"><span id="rfc.iref.g.1"></span>  <a href="#methods" class="smpl">method</a>         = <a href="#core.rules" class="smpl">token</a>
    911 </pre><p id="rfc.section.2.p.3">The list of methods allowed by a resource can be specified in an Allow header field (<a href="#header.allow" id="rfc.xref.header.allow.1" title="Allow">Section&nbsp;11.1</a>). The status code of the response always notifies the client whether a method is currently allowed on a resource, since the
     907</pre><p id="rfc.section.2.p.3">The list of methods allowed by a resource can be specified in an Allow header field (<a href="#header.allow" id="rfc.xref.header.allow.1" title="Allow">Section&nbsp;10.1</a>). The status code of the response always notifies the client whether a method is currently allowed on a resource, since the
    912908         set of allowed methods can change dynamically. An origin server <em class="bcp14">SHOULD</em> respond with the status code 405 (Method Not Allowed) if the method is known by the origin server but not allowed for the
    913909         resource, and 501 (Not Implemented) if the method is unrecognized or not implemented by the origin server. The methods GET
     
    989985         but might be defined by future extensions to HTTP. Content negotiation <em class="bcp14">MAY</em> be used to select the appropriate response format. If no response body is included, the response <em class="bcp14">MUST</em> include a Content-Length field with a field-value of "0".
    990986      </p>
    991       <p id="rfc.section.2.3.1.p.7">The Max-Forwards header field <em class="bcp14">MAY</em> be used to target a specific proxy in the request chain (see <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.1" title="Max-Forwards">Section&nbsp;11.6</a>). If no Max-Forwards field is present in the request, then the forwarded request <em class="bcp14">MUST NOT</em> include a Max-Forwards field.
     987      <p id="rfc.section.2.3.1.p.7">The Max-Forwards header field <em class="bcp14">MAY</em> be used to target a specific proxy in the request chain (see <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.1" title="Max-Forwards">Section&nbsp;10.6</a>). If no Max-Forwards field is present in the request, then the forwarded request <em class="bcp14">MUST NOT</em> include a Max-Forwards field.
    992988      </p>
    993989      <h3 id="rfc.section.2.3.2"><a href="#rfc.section.2.3.2">2.3.2</a>&nbsp;<a id="GET" href="#GET">GET</a></h3>
     
    10131009      <p id="rfc.section.2.3.2.p.6">The response to a GET request is cacheable and <em class="bcp14">MAY</em> be used to satisfy subsequent GET and HEAD requests (see <a href="#Part6" id="rfc.xref.Part6.2"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
    10141010      </p>
    1015       <p id="rfc.section.2.3.2.p.7">See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;13.2</a> for security considerations when used for forms.
     1011      <p id="rfc.section.2.3.2.p.7">See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;12.2</a> for security considerations when used for forms.
    10161012      </p>
    10171013      <h3 id="rfc.section.2.3.3"><a href="#rfc.section.2.3.3">2.3.3</a>&nbsp;<a id="HEAD" href="#HEAD">HEAD</a></h3>
     
    10471043      </p>
    10481044      <p id="rfc.section.2.3.4.p.4">If a resource has been created on the origin server, the response <em class="bcp14">SHOULD</em> be 201 (Created) and contain a representation which describes the status of the request and refers to the new resource, and
    1049          a Location header field (see <a href="#header.location" id="rfc.xref.header.location.1" title="Location">Section&nbsp;11.5</a>).
    1050       </p>
    1051       <p id="rfc.section.2.3.4.p.5">Responses to POST requests are only cacheable when they include explicit freshness information (see <a href="p6-cache.html#calculating.freshness.lifetime" title="Calculating Freshness Lifetime">Section 2.3.1</a> of <a href="#Part6" id="rfc.xref.Part6.4"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>). A cached POST response with a Content-Location header field (see <a href="#header.content-location" id="rfc.xref.header.content-location.1" title="Content-Location">Section&nbsp;11.17</a>) whose value is the effective Request URI <em class="bcp14">MAY</em> be used to satisfy subsequent GET and HEAD requests.
     1045         a Location header field (see <a href="#header.location" id="rfc.xref.header.location.1" title="Location">Section&nbsp;10.5</a>).
     1046      </p>
     1047      <p id="rfc.section.2.3.4.p.5">Responses to POST requests are only cacheable when they include explicit freshness information (see <a href="p6-cache.html#calculating.freshness.lifetime" title="Calculating Freshness Lifetime">Section 2.3.1</a> of <a href="#Part6" id="rfc.xref.Part6.4"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>). A cached POST response with a Content-Location header field (see <a href="#header.content-location" id="rfc.xref.header.content-location.1" title="Content-Location">Section&nbsp;10.17</a>) whose value is the effective Request URI <em class="bcp14">MAY</em> be used to satisfy subsequent GET and HEAD requests.
    10521048      </p>
    10531049      <p id="rfc.section.2.3.4.p.6">Note that POST caching is not widely implemented. However, the 303 (See Other) response can be used to direct the user agent
     
    11371133      <div id="rfc.iref.m.7"></div>
    11381134      <p id="rfc.section.2.3.7.p.1">The TRACE method requests a remote, application-layer loop-back of the request message. The final recipient of the request <em class="bcp14">SHOULD</em> reflect the message received back to the client as the message body of a 200 (OK) response. The final recipient is either
    1139          the origin server or the first proxy to receive a Max-Forwards value of zero (0) in the request (see <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.2" title="Max-Forwards">Section&nbsp;11.6</a>). A TRACE request <em class="bcp14">MUST NOT</em> include a message body.
     1135         the origin server or the first proxy to receive a Max-Forwards value of zero (0) in the request (see <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.2" title="Max-Forwards">Section&nbsp;10.6</a>). A TRACE request <em class="bcp14">MUST NOT</em> include a message body.
    11401136      </p>
    11411137      <p id="rfc.section.2.3.7.p.2">TRACE allows the client to see what is being received at the other end of the request chain and use that data for testing
     
    12121208         double quotes will likely cause unnecessary confusion.
    12131209      </p>
    1214       <p id="rfc.section.3.1.p.8">Many header fields use a format including (case-insensitively) named parameters (for instance, Content-Type, defined in <a href="#header.content-type" id="rfc.xref.header.content-type.1" title="Content-Type">Section&nbsp;11.18</a>). Allowing both unquoted (token) and quoted (quoted-string) syntax for the parameter value enables recipients to use existing
     1210      <p id="rfc.section.3.1.p.8">Many header fields use a format including (case-insensitively) named parameters (for instance, Content-Type, defined in <a href="#header.content-type" id="rfc.xref.header.content-type.1" title="Content-Type">Section&nbsp;10.18</a>). Allowing both unquoted (token) and quoted (quoted-string) syntax for the parameter value enables recipients to use existing
    12151211         parser components. When allowing both forms, the meaning of a parameter value ought to be independent of the syntax used for
    1216          it (for an example, see the notes on parameter handling for media types in <a href="#media.types" title="Media Types">Section&nbsp;7.3</a>).
     1212         it (for an example, see the notes on parameter handling for media types in <a href="#media.types" title="Media Types">Section&nbsp;6.5</a>).
    12171213      </p>
    12181214      <p id="rfc.section.3.1.p.9">Authors of specifications defining new header fields are advised to consider documenting: </p>
     
    12691265               <tr>
    12701266                  <td class="left">Accept</td>
    1271                   <td class="left"><a href="#header.accept" id="rfc.xref.header.accept.1" title="Accept">Section&nbsp;11.11</a></td>
     1267                  <td class="left"><a href="#header.accept" id="rfc.xref.header.accept.1" title="Accept">Section&nbsp;10.11</a></td>
    12721268               </tr>
    12731269               <tr>
    12741270                  <td class="left">Accept-Charset</td>
    1275                   <td class="left"><a href="#header.accept-charset" id="rfc.xref.header.accept-charset.1" title="Accept-Charset">Section&nbsp;11.12</a></td>
     1271                  <td class="left"><a href="#header.accept-charset" id="rfc.xref.header.accept-charset.1" title="Accept-Charset">Section&nbsp;10.12</a></td>
    12761272               </tr>
    12771273               <tr>
    12781274                  <td class="left">Accept-Encoding</td>
    1279                   <td class="left"><a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.1" title="Accept-Encoding">Section&nbsp;11.13</a></td>
     1275                  <td class="left"><a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.1" title="Accept-Encoding">Section&nbsp;10.13</a></td>
    12801276               </tr>
    12811277               <tr>
    12821278                  <td class="left">Accept-Language</td>
    1283                   <td class="left"><a href="#header.accept-language" id="rfc.xref.header.accept-language.1" title="Accept-Language">Section&nbsp;11.14</a></td>
     1279                  <td class="left"><a href="#header.accept-language" id="rfc.xref.header.accept-language.1" title="Accept-Language">Section&nbsp;10.14</a></td>
    12841280               </tr>
    12851281               <tr>
     
    12891285               <tr>
    12901286                  <td class="left">Expect</td>
    1291                   <td class="left"><a href="#header.expect" id="rfc.xref.header.expect.1" title="Expect">Section&nbsp;11.3</a></td>
     1287                  <td class="left"><a href="#header.expect" id="rfc.xref.header.expect.1" title="Expect">Section&nbsp;10.3</a></td>
    12921288               </tr>
    12931289               <tr>
    12941290                  <td class="left">From</td>
    1295                   <td class="left"><a href="#header.from" id="rfc.xref.header.from.1" title="From">Section&nbsp;11.4</a></td>
     1291                  <td class="left"><a href="#header.from" id="rfc.xref.header.from.1" title="From">Section&nbsp;10.4</a></td>
    12961292               </tr>
    12971293               <tr>
     
    13211317               <tr>
    13221318                  <td class="left">Max-Forwards</td>
    1323                   <td class="left"><a href="#header.max-forwards" id="rfc.xref.header.max-forwards.3" title="Max-Forwards">Section&nbsp;11.6</a></td>
     1319                  <td class="left"><a href="#header.max-forwards" id="rfc.xref.header.max-forwards.3" title="Max-Forwards">Section&nbsp;10.6</a></td>
    13241320               </tr>
    13251321               <tr>
     
    13331329               <tr>
    13341330                  <td class="left">Referer</td>
    1335                   <td class="left"><a href="#header.referer" id="rfc.xref.header.referer.1" title="Referer">Section&nbsp;11.7</a></td>
     1331                  <td class="left"><a href="#header.referer" id="rfc.xref.header.referer.1" title="Referer">Section&nbsp;10.7</a></td>
    13361332               </tr>
    13371333               <tr>
     
    13411337               <tr>
    13421338                  <td class="left">User-Agent</td>
    1343                   <td class="left"><a href="#header.user-agent" id="rfc.xref.header.user-agent.1" title="User-Agent">Section&nbsp;11.10</a></td>
     1339                  <td class="left"><a href="#header.user-agent" id="rfc.xref.header.user-agent.1" title="User-Agent">Section&nbsp;10.10</a></td>
    13441340               </tr>
    13451341            </tbody>
     
    13691365               <tr>
    13701366                  <td class="left">Allow</td>
    1371                   <td class="left"><a href="#header.allow" id="rfc.xref.header.allow.2" title="Allow">Section&nbsp;11.1</a></td>
     1367                  <td class="left"><a href="#header.allow" id="rfc.xref.header.allow.2" title="Allow">Section&nbsp;10.1</a></td>
    13721368               </tr>
    13731369               <tr>
    13741370                  <td class="left">Date</td>
    1375                   <td class="left"><a href="#header.date" id="rfc.xref.header.date.1" title="Date">Section&nbsp;11.2</a></td>
     1371                  <td class="left"><a href="#header.date" id="rfc.xref.header.date.1" title="Date">Section&nbsp;10.2</a></td>
    13761372               </tr>
    13771373               <tr>
     
    13811377               <tr>
    13821378                  <td class="left">Location</td>
    1383                   <td class="left"><a href="#header.location" id="rfc.xref.header.location.2" title="Location">Section&nbsp;11.5</a></td>
     1379                  <td class="left"><a href="#header.location" id="rfc.xref.header.location.2" title="Location">Section&nbsp;10.5</a></td>
    13841380               </tr>
    13851381               <tr>
     
    13891385               <tr>
    13901386                  <td class="left">Retry-After</td>
    1391                   <td class="left"><a href="#header.retry-after" id="rfc.xref.header.retry-after.1" title="Retry-After">Section&nbsp;11.8</a></td>
     1387                  <td class="left"><a href="#header.retry-after" id="rfc.xref.header.retry-after.1" title="Retry-After">Section&nbsp;10.8</a></td>
    13921388               </tr>
    13931389               <tr>
    13941390                  <td class="left">Server</td>
    1395                   <td class="left"><a href="#header.server" id="rfc.xref.header.server.1" title="Server">Section&nbsp;11.9</a></td>
     1391                  <td class="left"><a href="#header.server" id="rfc.xref.header.server.1" title="Server">Section&nbsp;10.9</a></td>
    13961392               </tr>
    13971393               <tr>
     
    14301426      </ul>
    14311427      <p id="rfc.section.4.p.6">For most status codes the response can carry a payload, in which case a Content-Type header field indicates the payload's
    1432          media type (<a href="#header.content-type" id="rfc.xref.header.content-type.2" title="Content-Type">Section&nbsp;11.18</a>).
     1428         media type (<a href="#header.content-type" id="rfc.xref.header.content-type.2" title="Content-Type">Section&nbsp;10.18</a>).
    14331429      </p>
    14341430      <h2 id="rfc.section.4.1"><a href="#rfc.section.4.1">4.1</a>&nbsp;<a id="overview.of.status.codes" href="#overview.of.status.codes">Overview of Status Codes</a></h2>
     
    18091805         </li>
    18101806         <li>
    1811             <p>Redirection offering a choice of matching resources for use by agent-driven content negotiation (<a href="#agent-driven.negotiation" title="Agent-driven Negotiation">Section&nbsp;10.2</a>). This is status code 300 (Multiple Choices).
     1807            <p>Redirection offering a choice of matching resources for use by agent-driven content negotiation (<a href="#agent-driven.negotiation" title="Agent-driven Negotiation">Section&nbsp;9.2</a>). This is status code 300 (Multiple Choices).
    18121808            </p>
    18131809         </li>
     
    18261822         </p>
    18271823      </div>
    1828       <p id="rfc.section.4.5.p.4">A Location header field on a 3xx response indicates that a client <em class="bcp14">MAY</em> automatically redirect to the URI provided; see <a href="#header.location" id="rfc.xref.header.location.3" title="Location">Section&nbsp;11.5</a>.
     1824      <p id="rfc.section.4.5.p.4">A Location header field on a 3xx response indicates that a client <em class="bcp14">MAY</em> automatically redirect to the URI provided; see <a href="#header.location" id="rfc.xref.header.location.3" title="Location">Section&nbsp;10.5</a>.
    18291825      </p>
    18301826      <p id="rfc.section.4.5.p.5">Note that for methods not known to be "safe", as defined in <a href="#safe.methods" title="Safe Methods">Section&nbsp;2.1.1</a>, automatic redirection needs to done with care, since the redirect might change the conditions under which the request was
     
    18411837      <h3 id="rfc.section.4.5.1"><a href="#rfc.section.4.5.1">4.5.1</a>&nbsp;<a id="status.300" href="#status.300">300 Multiple Choices</a></h3>
    18421838      <p id="rfc.section.4.5.1.p.1">The target resource has more than one representation, each with its own specific location, and agent-driven negotiation information
    1843          (<a href="#content.negotiation" title="Content Negotiation">Section&nbsp;10</a>) is being provided so that the user (or user agent) can select a preferred representation by redirecting its request to that
     1839         (<a href="#content.negotiation" title="Content Negotiation">Section&nbsp;9</a>) is being provided so that the user (or user agent) can select a preferred representation by redirecting its request to that
    18441840         location.
    18451841      </p>
     
    20422038      <div id="rfc.iref.s.31"></div>
    20432039      <h3 id="rfc.section.4.6.14"><a href="#rfc.section.4.6.14">4.6.14</a>&nbsp;<a id="status.417" href="#status.417">417 Expectation Failed</a></h3>
    2044       <p id="rfc.section.4.6.14.p.1">The expectation given in an Expect header field (see <a href="#header.expect" id="rfc.xref.header.expect.2" title="Expect">Section&nbsp;11.3</a>) could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could
     2040      <p id="rfc.section.4.6.14.p.1">The expectation given in an Expect header field (see <a href="#header.expect" id="rfc.xref.header.expect.2" title="Expect">Section&nbsp;10.3</a>) could not be met by this server, or, if the server is a proxy, the server has unambiguous evidence that the request could
    20452041         not be met by the next-hop server.
    20462042      </p>
     
    20872083      <p id="rfc.section.4.7.4.p.1">The server is currently unable to handle the request due to a temporary overloading or maintenance of the server.</p>
    20882084      <p id="rfc.section.4.7.4.p.2">The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the
    2089          delay <em class="bcp14">MAY</em> be indicated in a Retry-After header field (<a href="#header.retry-after" id="rfc.xref.header.retry-after.2" title="Retry-After">Section&nbsp;11.8</a>). If no Retry-After is given, the client <em class="bcp14">SHOULD</em> handle the response as it would for a 500 response.
     2085         delay <em class="bcp14">MAY</em> be indicated in a Retry-After header field (<a href="#header.retry-after" id="rfc.xref.header.retry-after.2" title="Retry-After">Section&nbsp;10.8</a>). If no Retry-After is given, the client <em class="bcp14">SHOULD</em> handle the response as it would for a 500 response.
    20902086      </p>
    20912087      <div class="note" id="rfc.section.4.7.4.p.3">
     
    21142110      <p id="rfc.section.5.p.1">Request and Response messages <em class="bcp14">MAY</em> transfer a representation if not otherwise restricted by the request method or response status code. A representation consists
    21152111         of metadata (representation header fields) and data (representation body). When a complete or partial representation is enclosed
    2116          in an HTTP message, it is referred to as the payload of the message. HTTP representations are defined in <a href="#payload" title="Payload">Section&nbsp;8</a>.
     2112         in an HTTP message, it is referred to as the payload of the message. HTTP representations are defined in <a href="#payload" title="Payload">Section&nbsp;7</a>.
    21172113      </p>
    21182114      <p id="rfc.section.5.p.2">A representation body is only present in a message when a message body is present, as described in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.36"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. The representation body is obtained from the message body by decoding any Transfer-Encoding that might have been applied
     
    22432239</pre><p id="rfc.section.6.2.p.5">Product tokens <em class="bcp14">SHOULD</em> be short and to the point. They <em class="bcp14">MUST NOT</em> be used for advertising or other non-essential information. Although any token octet <em class="bcp14">MAY</em> appear in a product-version, this token <em class="bcp14">SHOULD</em> only be used for a version identifier (i.e., successive versions of the same product <em class="bcp14">SHOULD</em> only differ in the product-version portion of the product value).
    22442240      </p>
    2245       <h1 id="rfc.section.7"><a href="#rfc.section.7">7.</a>&nbsp;<a id="protocol.parameters" href="#protocol.parameters">Protocol Parameters</a></h1>
    2246       <h2 id="rfc.section.7.1"><a href="#rfc.section.7.1">7.1</a>&nbsp;<a id="character.sets" href="#character.sets">Character Encodings (charset)</a></h2>
    2247       <p id="rfc.section.7.1.p.1">HTTP uses charset names to indicate the character encoding of a textual representation.</p>
     2241      <h2 id="rfc.section.6.3"><a href="#rfc.section.6.3">6.3</a>&nbsp;<a id="character.sets" href="#character.sets">Character Encodings (charset)</a></h2>
     2242      <p id="rfc.section.6.3.p.1">HTTP uses charset names to indicate the character encoding of a textual representation.</p>
    22482243      <div id="rule.charset">
    2249          <p id="rfc.section.7.1.p.2">  A character encoding is identified by a case-insensitive token. The complete set of tokens is defined by the IANA Character
     2244         <p id="rfc.section.6.3.p.2">  A character encoding is identified by a case-insensitive token. The complete set of tokens is defined by the IANA Character
    22502245            Set registry (&lt;<a href="http://www.iana.org/assignments/character-sets">http://www.iana.org/assignments/character-sets</a>&gt;).
    22512246         </p>
    22522247      </div>
    22532248      <div id="rfc.figure.u.18"></div><pre class="inline"><span id="rfc.iref.g.24"></span>  <a href="#rule.charset" class="smpl">charset</a> = <a href="#core.rules" class="smpl">token</a>
    2254 </pre><p id="rfc.section.7.1.p.4">Although HTTP allows an arbitrary token to be used as a charset value, any token that has a predefined value within the IANA
     2249</pre><p id="rfc.section.6.3.p.4">Although HTTP allows an arbitrary token to be used as a charset value, any token that has a predefined value within the IANA
    22552250         Character Set registry <em class="bcp14">MUST</em> represent the character encoding defined by that registry. Applications <em class="bcp14">SHOULD</em> limit their use of character encodings to those defined within the IANA registry.
    22562251      </p>
    2257       <p id="rfc.section.7.1.p.5">HTTP uses charset in two contexts: within an Accept-Charset request header field (in which the charset value is an unquoted
     2252      <p id="rfc.section.6.3.p.5">HTTP uses charset in two contexts: within an Accept-Charset request header field (in which the charset value is an unquoted
    22582253         token) and as the value of a parameter in a Content-Type header field (within a request or response), in which case the parameter
    22592254         value of the charset parameter can be quoted.
    22602255      </p>
    2261       <p id="rfc.section.7.1.p.6">Implementors need to be aware of IETF character set requirements <a href="#RFC3629" id="rfc.xref.RFC3629.1"><cite title="UTF-8, a transformation format of ISO 10646">[RFC3629]</cite></a>  <a href="#RFC2277" id="rfc.xref.RFC2277.1"><cite title="IETF Policy on Character Sets and Languages">[RFC2277]</cite></a>.
    2262       </p>
    2263       <h2 id="rfc.section.7.2"><a href="#rfc.section.7.2">7.2</a>&nbsp;<a id="content.codings" href="#content.codings">Content Codings</a></h2>
    2264       <p id="rfc.section.7.2.p.1">Content coding values indicate an encoding transformation that has been or can be applied to a representation. Content codings
     2256      <p id="rfc.section.6.3.p.6">Implementors need to be aware of IETF character set requirements <a href="#RFC3629" id="rfc.xref.RFC3629.1"><cite title="UTF-8, a transformation format of ISO 10646">[RFC3629]</cite></a>  <a href="#RFC2277" id="rfc.xref.RFC2277.1"><cite title="IETF Policy on Character Sets and Languages">[RFC2277]</cite></a>.
     2257      </p>
     2258      <h2 id="rfc.section.6.4"><a href="#rfc.section.6.4">6.4</a>&nbsp;<a id="content.codings" href="#content.codings">Content Codings</a></h2>
     2259      <p id="rfc.section.6.4.p.1">Content coding values indicate an encoding transformation that has been or can be applied to a representation. Content codings
    22652260         are primarily used to allow a representation to be compressed or otherwise usefully transformed without losing the identity
    22662261         of its underlying media type and without loss of information. Frequently, the representation is stored in coded form, transmitted
     
    22682263      </p>
    22692264      <div id="rfc.figure.u.19"></div><pre class="inline"><span id="rfc.iref.g.25"></span>  <a href="#content.codings" class="smpl">content-coding</a>   = <a href="#core.rules" class="smpl">token</a>
    2270 </pre><p id="rfc.section.7.2.p.3">All content-coding values are case-insensitive. HTTP/1.1 uses content-coding values in the Accept-Encoding (<a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.2" title="Accept-Encoding">Section&nbsp;11.13</a>) and Content-Encoding (<a href="#header.content-encoding" id="rfc.xref.header.content-encoding.1" title="Content-Encoding">Section&nbsp;11.15</a>) header fields. Although the value describes the content-coding, what is more important is that it indicates what decoding
     2265</pre><p id="rfc.section.6.4.p.3">All content-coding values are case-insensitive. HTTP/1.1 uses content-coding values in the Accept-Encoding (<a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.2" title="Accept-Encoding">Section&nbsp;10.13</a>) and Content-Encoding (<a href="#header.content-encoding" id="rfc.xref.header.content-encoding.1" title="Content-Encoding">Section&nbsp;10.15</a>) header fields. Although the value describes the content-coding, what is more important is that it indicates what decoding
    22712266         mechanism will be required to remove the encoding.
    22722267      </p>
    2273       <p id="rfc.section.7.2.p.4">compress<span id="rfc.iref.c.3"></span><span id="rfc.iref.c.4"></span> 
     2268      <p id="rfc.section.6.4.p.4">compress<span id="rfc.iref.c.3"></span><span id="rfc.iref.c.4"></span> 
    22742269      </p>
    22752270      <ul class="empty">
     
    22772272         </li>
    22782273      </ul>
    2279       <p id="rfc.section.7.2.p.5">deflate<span id="rfc.iref.d.2"></span><span id="rfc.iref.c.5"></span> 
     2274      <p id="rfc.section.6.4.p.5">deflate<span id="rfc.iref.d.2"></span><span id="rfc.iref.c.5"></span> 
    22802275      </p>
    22812276      <ul class="empty">
     
    22832278         </li>
    22842279      </ul>
    2285       <p id="rfc.section.7.2.p.6">gzip<span id="rfc.iref.g.26"></span><span id="rfc.iref.c.6"></span> 
     2280      <p id="rfc.section.6.4.p.6">gzip<span id="rfc.iref.g.26"></span><span id="rfc.iref.c.6"></span> 
    22862281      </p>
    22872282      <ul class="empty">
     
    22892284         </li>
    22902285      </ul>
    2291       <h3 id="rfc.section.7.2.1"><a href="#rfc.section.7.2.1">7.2.1</a>&nbsp;<a id="content.coding.registry" href="#content.coding.registry">Content Coding Registry</a></h3>
    2292       <p id="rfc.section.7.2.1.p.1">The HTTP Content Coding Registry defines the name space for the content coding names.</p>
    2293       <p id="rfc.section.7.2.1.p.2">Registrations <em class="bcp14">MUST</em> include the following fields:
     2286      <h3 id="rfc.section.6.4.1"><a href="#rfc.section.6.4.1">6.4.1</a>&nbsp;<a id="content.coding.registry" href="#content.coding.registry">Content Coding Registry</a></h3>
     2287      <p id="rfc.section.6.4.1.p.1">The HTTP Content Coding Registry defines the name space for the content coding names.</p>
     2288      <p id="rfc.section.6.4.1.p.2">Registrations <em class="bcp14">MUST</em> include the following fields:
    22942289      </p>
    22952290      <ul>
     
    22982293         <li>Pointer to specification text</li>
    22992294      </ul>
    2300       <p id="rfc.section.7.2.1.p.3">Names of content codings <em class="bcp14">MUST NOT</em> overlap with names of transfer codings (<a href="p1-messaging.html#transfer.codings" title="Transfer Codings">Section 4</a> of <a href="#Part1" id="rfc.xref.Part1.41"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>), unless the encoding transformation is identical (as is the case for the compression codings defined in <a href="p1-messaging.html#compression.codings" title="Compression Codings">Section 4.2</a> of <a href="#Part1" id="rfc.xref.Part1.42"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    2301       </p>
    2302       <p id="rfc.section.7.2.1.p.4">Values to be added to this name space require IETF Review (see <a href="http://tools.ietf.org/html/rfc5226#section-4.1">Section 4.1</a> of <a href="#RFC5226" id="rfc.xref.RFC5226.3"><cite title="Guidelines for Writing an IANA Considerations Section in RFCs">[RFC5226]</cite></a>), and <em class="bcp14">MUST</em> conform to the purpose of content coding defined in this section.
    2303       </p>
    2304       <p id="rfc.section.7.2.1.p.5">The registry itself is maintained at &lt;<a href="http://www.iana.org/assignments/http-parameters">http://www.iana.org/assignments/http-parameters</a>&gt;.
    2305       </p>
    2306       <h2 id="rfc.section.7.3"><a href="#rfc.section.7.3">7.3</a>&nbsp;<a id="media.types" href="#media.types">Media Types</a></h2>
    2307       <p id="rfc.section.7.3.p.1">HTTP uses Internet Media Types <a href="#RFC2046" id="rfc.xref.RFC2046.1"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types">[RFC2046]</cite></a> in the Content-Type (<a href="#header.content-type" id="rfc.xref.header.content-type.3" title="Content-Type">Section&nbsp;11.18</a>) and Accept (<a href="#header.accept" id="rfc.xref.header.accept.2" title="Accept">Section&nbsp;11.11</a>) header fields in order to provide open and extensible data typing and type negotiation.
     2295      <p id="rfc.section.6.4.1.p.3">Names of content codings <em class="bcp14">MUST NOT</em> overlap with names of transfer codings (<a href="p1-messaging.html#transfer.codings" title="Transfer Codings">Section 4</a> of <a href="#Part1" id="rfc.xref.Part1.41"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>), unless the encoding transformation is identical (as is the case for the compression codings defined in <a href="p1-messaging.html#compression.codings" title="Compression Codings">Section 4.2</a> of <a href="#Part1" id="rfc.xref.Part1.42"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     2296      </p>
     2297      <p id="rfc.section.6.4.1.p.4">Values to be added to this name space require IETF Review (see <a href="http://tools.ietf.org/html/rfc5226#section-4.1">Section 4.1</a> of <a href="#RFC5226" id="rfc.xref.RFC5226.3"><cite title="Guidelines for Writing an IANA Considerations Section in RFCs">[RFC5226]</cite></a>), and <em class="bcp14">MUST</em> conform to the purpose of content coding defined in this section.
     2298      </p>
     2299      <p id="rfc.section.6.4.1.p.5">The registry itself is maintained at &lt;<a href="http://www.iana.org/assignments/http-parameters">http://www.iana.org/assignments/http-parameters</a>&gt;.
     2300      </p>
     2301      <h2 id="rfc.section.6.5"><a href="#rfc.section.6.5">6.5</a>&nbsp;<a id="media.types" href="#media.types">Media Types</a></h2>
     2302      <p id="rfc.section.6.5.p.1">HTTP uses Internet Media Types <a href="#RFC2046" id="rfc.xref.RFC2046.1"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types">[RFC2046]</cite></a> in the Content-Type (<a href="#header.content-type" id="rfc.xref.header.content-type.3" title="Content-Type">Section&nbsp;10.18</a>) and Accept (<a href="#header.accept" id="rfc.xref.header.accept.2" title="Accept">Section&nbsp;10.11</a>) header fields in order to provide open and extensible data typing and type negotiation.
    23082303      </p>
    23092304      <div id="rfc.figure.u.20"></div><pre class="inline"><span id="rfc.iref.g.27"></span><span id="rfc.iref.g.28"></span><span id="rfc.iref.g.29"></span>  <a href="#media.types" class="smpl">media-type</a> = <a href="#media.types" class="smpl">type</a> "/" <a href="#media.types" class="smpl">subtype</a> *( <a href="#core.rules" class="smpl">OWS</a> ";" <a href="#core.rules" class="smpl">OWS</a> <a href="#rule.parameter" class="smpl">parameter</a> )
     
    23112306  <a href="#media.types" class="smpl">subtype</a>    = <a href="#core.rules" class="smpl">token</a>
    23122307</pre><div id="rule.parameter">
    2313          <p id="rfc.section.7.3.p.3">      The type/subtype <em class="bcp14">MAY</em> be followed by parameters in the form of attribute/value pairs.
     2308         <p id="rfc.section.6.5.p.3">      The type/subtype <em class="bcp14">MAY</em> be followed by parameters in the form of attribute/value pairs.
    23142309         </p>
    23152310      </div>
     
    23172312  <a href="#rule.parameter" class="smpl">attribute</a>      = <a href="#core.rules" class="smpl">token</a>
    23182313  <a href="#rule.parameter" class="smpl">value</a>          = word
    2319 </pre><p id="rfc.section.7.3.p.5">The type, subtype, and parameter attribute names are case-insensitive. Parameter values might or might not be case-sensitive,
     2314</pre><p id="rfc.section.6.5.p.5">The type, subtype, and parameter attribute names are case-insensitive. Parameter values might or might not be case-sensitive,
    23202315         depending on the semantics of the parameter name. The presence or absence of a parameter might be significant to the processing
    23212316         of a media-type, depending on its definition within the media type registry.
    23222317      </p>
    2323       <p id="rfc.section.7.3.p.6">A parameter value that matches the <a href="#core.rules" class="smpl">token</a> production can be transmitted as either a token or within a quoted-string. The quoted and unquoted values are equivalent.
    2324       </p>
    2325       <p id="rfc.section.7.3.p.7">Note that some older HTTP applications do not recognize media type parameters. When sending data to older HTTP applications,
     2318      <p id="rfc.section.6.5.p.6">A parameter value that matches the <a href="#core.rules" class="smpl">token</a> production can be transmitted as either a token or within a quoted-string. The quoted and unquoted values are equivalent.
     2319      </p>
     2320      <p id="rfc.section.6.5.p.7">Note that some older HTTP applications do not recognize media type parameters. When sending data to older HTTP applications,
    23262321         implementations <em class="bcp14">SHOULD</em> only use media type parameters when they are required by that type/subtype definition.
    23272322      </p>
    2328       <p id="rfc.section.7.3.p.8">Media-type values are registered with the Internet Assigned Number Authority (IANA). The media type registration process is
     2323      <p id="rfc.section.6.5.p.8">Media-type values are registered with the Internet Assigned Number Authority (IANA). The media type registration process is
    23292324         outlined in <a href="#RFC4288" id="rfc.xref.RFC4288.1"><cite title="Media Type Specifications and Registration Procedures">[RFC4288]</cite></a>. Use of non-registered media types is discouraged.
    23302325      </p>
    2331       <h3 id="rfc.section.7.3.1"><a href="#rfc.section.7.3.1">7.3.1</a>&nbsp;<a id="canonicalization.and.text.defaults" href="#canonicalization.and.text.defaults">Canonicalization and Text Defaults</a></h3>
    2332       <p id="rfc.section.7.3.1.p.1">Internet media types are registered with a canonical form. A representation transferred via HTTP messages <em class="bcp14">MUST</em> be in the appropriate canonical form prior to its transmission except for "text" types, as defined in the next paragraph.
    2333       </p>
    2334       <p id="rfc.section.7.3.1.p.2">When in canonical form, media subtypes of the "text" type use CRLF as the text line break. HTTP relaxes this requirement and
     2326      <h3 id="rfc.section.6.5.1"><a href="#rfc.section.6.5.1">6.5.1</a>&nbsp;<a id="canonicalization.and.text.defaults" href="#canonicalization.and.text.defaults">Canonicalization and Text Defaults</a></h3>
     2327      <p id="rfc.section.6.5.1.p.1">Internet media types are registered with a canonical form. A representation transferred via HTTP messages <em class="bcp14">MUST</em> be in the appropriate canonical form prior to its transmission except for "text" types, as defined in the next paragraph.
     2328      </p>
     2329      <p id="rfc.section.6.5.1.p.2">When in canonical form, media subtypes of the "text" type use CRLF as the text line break. HTTP relaxes this requirement and
    23352330         allows the transport of text media with plain CR or LF alone representing a line break when it is done consistently for an
    23362331         entire representation. HTTP applications <em class="bcp14">MUST</em> accept CRLF, bare CR, and bare LF as indicating a line break in text media received via HTTP. In addition, if the text is
     
    23402335         body; a bare CR or LF <em class="bcp14">MUST NOT</em> be substituted for CRLF within any of the HTTP control structures (such as header fields and multipart boundaries).
    23412336      </p>
    2342       <p id="rfc.section.7.3.1.p.3">If a representation is encoded with a content-coding, the underlying data <em class="bcp14">MUST</em> be in a form defined above prior to being encoded.
    2343       </p>
    2344       <h3 id="rfc.section.7.3.2"><a href="#rfc.section.7.3.2">7.3.2</a>&nbsp;<a id="multipart.types" href="#multipart.types">Multipart Types</a></h3>
    2345       <p id="rfc.section.7.3.2.p.1">MIME provides for a number of "multipart" types — encapsulations of one or more representations within a single message body.
     2337      <p id="rfc.section.6.5.1.p.3">If a representation is encoded with a content-coding, the underlying data <em class="bcp14">MUST</em> be in a form defined above prior to being encoded.
     2338      </p>
     2339      <h3 id="rfc.section.6.5.2"><a href="#rfc.section.6.5.2">6.5.2</a>&nbsp;<a id="multipart.types" href="#multipart.types">Multipart Types</a></h3>
     2340      <p id="rfc.section.6.5.2.p.1">MIME provides for a number of "multipart" types — encapsulations of one or more representations within a single message body.
    23462341         All multipart types share a common syntax, as defined in <a href="http://tools.ietf.org/html/rfc2046#section-5.1.1">Section 5.1.1</a> of <a href="#RFC2046" id="rfc.xref.RFC2046.2"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types">[RFC2046]</cite></a>, and <em class="bcp14">MUST</em> include a boundary parameter as part of the media type value. The message body is itself a protocol element and <em class="bcp14">MUST</em> therefore use only CRLF to represent line breaks between body-parts.
    23472342      </p>
    2348       <p id="rfc.section.7.3.2.p.2">In general, HTTP treats a multipart message body no differently than any other media type: strictly as payload. HTTP does
     2343      <p id="rfc.section.6.5.2.p.2">In general, HTTP treats a multipart message body no differently than any other media type: strictly as payload. HTTP does
    23492344         not use the multipart boundary as an indicator of message body length.  In all other respects, an HTTP user agent <em class="bcp14">SHOULD</em> follow the same or similar behavior as a MIME user agent would upon receipt of a multipart type. The MIME header fields within
    23502345         each body-part of a multipart message body do not have any significance to HTTP beyond that defined by their MIME semantics.
    23512346      </p>
    2352       <p id="rfc.section.7.3.2.p.3">If an application receives an unrecognized multipart subtype, the application <em class="bcp14">MUST</em> treat it as being equivalent to "multipart/mixed".
    2353       </p>
    2354       <div class="note" id="rfc.section.7.3.2.p.4">
     2347      <p id="rfc.section.6.5.2.p.3">If an application receives an unrecognized multipart subtype, the application <em class="bcp14">MUST</em> treat it as being equivalent to "multipart/mixed".
     2348      </p>
     2349      <div class="note" id="rfc.section.6.5.2.p.4">
    23552350         <p> <b>Note:</b> The "multipart/form-data" type has been specifically defined for carrying form data suitable for processing via the POST request
    23562351            method, as described in <a href="#RFC2388" id="rfc.xref.RFC2388.1"><cite title="Returning Values from Forms: multipart/form-data">[RFC2388]</cite></a>.
    23572352         </p>
    23582353      </div>
    2359       <h2 id="rfc.section.7.4"><a href="#rfc.section.7.4">7.4</a>&nbsp;<a id="language.tags" href="#language.tags">Language Tags</a></h2>
    2360       <p id="rfc.section.7.4.p.1">A language tag, as defined in <a href="#RFC5646" id="rfc.xref.RFC5646.1"><cite title="Tags for Identifying Languages">[RFC5646]</cite></a>, identifies a natural language spoken, written, or otherwise conveyed by human beings for communication of information to
     2354      <h2 id="rfc.section.6.6"><a href="#rfc.section.6.6">6.6</a>&nbsp;<a id="language.tags" href="#language.tags">Language Tags</a></h2>
     2355      <p id="rfc.section.6.6.p.1">A language tag, as defined in <a href="#RFC5646" id="rfc.xref.RFC5646.1"><cite title="Tags for Identifying Languages">[RFC5646]</cite></a>, identifies a natural language spoken, written, or otherwise conveyed by human beings for communication of information to
    23612356         other human beings. Computer languages are explicitly excluded. HTTP uses language tags within the Accept-Language and Content-Language
    23622357         fields.
    23632358      </p>
    2364       <p id="rfc.section.7.4.p.2">In summary, a language tag is composed of one or more parts: A primary language subtag followed by a possibly empty series
     2359      <p id="rfc.section.6.6.p.2">In summary, a language tag is composed of one or more parts: A primary language subtag followed by a possibly empty series
    23652360         of subtags:
    23662361      </p>
    23672362      <div id="rfc.figure.u.22"></div><pre class="inline"><span id="rfc.iref.g.33"></span>  <a href="#language.tags" class="smpl">language-tag</a> = &lt;Language-Tag, defined in <a href="#RFC5646" id="rfc.xref.RFC5646.2"><cite title="Tags for Identifying Languages">[RFC5646]</cite></a>, <a href="http://tools.ietf.org/html/rfc5646#section-2.1">Section 2.1</a>&gt;
    2368 </pre><p id="rfc.section.7.4.p.4">White space is not allowed within the tag and all tags are case-insensitive. The name space of language subtags is administered
     2363</pre><p id="rfc.section.6.6.p.4">White space is not allowed within the tag and all tags are case-insensitive. The name space of language subtags is administered
    23692364         by the IANA (see &lt;<a href="http://www.iana.org/assignments/language-subtag-registry">http://www.iana.org/assignments/language-subtag-registry</a>&gt;).
    23702365      </p>
    23712366      <div id="rfc.figure.u.23"></div>
    23722367      <p>Example tags include:</p>  <pre class="text">  en, en-US, es-419, az-Arab, x-pig-latin, man-Nkoo-GN
    2373 </pre> <p id="rfc.section.7.4.p.6">See <a href="#RFC5646" id="rfc.xref.RFC5646.3"><cite title="Tags for Identifying Languages">[RFC5646]</cite></a> for further information.
    2374       </p>
    2375       <h1 id="rfc.section.8"><a href="#rfc.section.8">8.</a>&nbsp;<a id="payload" href="#payload">Payload</a></h1>
    2376       <p id="rfc.section.8.p.1">HTTP messages <em class="bcp14">MAY</em> transfer a payload if not otherwise restricted by the request method or response status code. The payload consists of metadata,
     2368</pre> <p id="rfc.section.6.6.p.6">See <a href="#RFC5646" id="rfc.xref.RFC5646.3"><cite title="Tags for Identifying Languages">[RFC5646]</cite></a> for further information.
     2369      </p>
     2370      <h1 id="rfc.section.7"><a href="#rfc.section.7">7.</a>&nbsp;<a id="payload" href="#payload">Payload</a></h1>
     2371      <p id="rfc.section.7.p.1">HTTP messages <em class="bcp14">MAY</em> transfer a payload if not otherwise restricted by the request method or response status code. The payload consists of metadata,
    23772372         in the form of header fields, and data, in the form of the sequence of octets in the message body after any transfer-coding
    23782373         has been decoded.
    23792374      </p>
    23802375      <div id="rfc.iref.p.3"></div>
    2381       <p id="rfc.section.8.p.2">A "<dfn>payload</dfn>" in HTTP is always a partial or complete representation of some resource. We use separate terms for payload and representation
     2376      <p id="rfc.section.7.p.2">A "<dfn>payload</dfn>" in HTTP is always a partial or complete representation of some resource. We use separate terms for payload and representation
    23822377         because some messages contain only the associated representation's header fields (e.g., responses to HEAD) or only some part(s)
    23832378         of the representation (e.g., the 206 status code).
    23842379      </p>
    2385       <h2 id="rfc.section.8.1"><a href="#rfc.section.8.1">8.1</a>&nbsp;<a id="payload.header.fields" href="#payload.header.fields">Payload Header Fields</a></h2>
    2386       <p id="rfc.section.8.1.p.1">HTTP header fields that specifically define the payload, rather than the associated representation, are referred to as "payload
     2380      <h2 id="rfc.section.7.1"><a href="#rfc.section.7.1">7.1</a>&nbsp;<a id="payload.header.fields" href="#payload.header.fields">Payload Header Fields</a></h2>
     2381      <p id="rfc.section.7.1.p.1">HTTP header fields that specifically define the payload, rather than the associated representation, are referred to as "payload
    23872382         header fields". The following payload header fields are defined by HTTP/1.1:
    23882383      </p>
     
    24072402         </table>
    24082403      </div>
    2409       <h2 id="rfc.section.8.2"><a href="#rfc.section.8.2">8.2</a>&nbsp;<a id="payload.body" href="#payload.body">Payload Body</a></h2>
    2410       <p id="rfc.section.8.2.p.1">A payload body is only present in a message when a message body is present, as described in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.44"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. The payload body is obtained from the message body by decoding any Transfer-Encoding that might have been applied to ensure
     2404      <h2 id="rfc.section.7.2"><a href="#rfc.section.7.2">7.2</a>&nbsp;<a id="payload.body" href="#payload.body">Payload Body</a></h2>
     2405      <p id="rfc.section.7.2.p.1">A payload body is only present in a message when a message body is present, as described in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.44"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. The payload body is obtained from the message body by decoding any Transfer-Encoding that might have been applied to ensure
    24112406         safe and proper transfer of the message.
    24122407      </p>
    24132408      <div id="rfc.iref.r.1"></div>
    2414       <h1 id="rfc.section.9"><a href="#rfc.section.9">9.</a>&nbsp;<a id="representation-TODO" href="#representation-TODO">Representation</a></h1>
    2415       <p id="rfc.section.9.p.1">A "<dfn>representation</dfn>" is information in a format that can be readily communicated from one party to another. A resource representation is information
     2409      <h1 id="rfc.section.8"><a href="#rfc.section.8">8.</a>&nbsp;<a id="representation-TODO" href="#representation-TODO">Representation</a></h1>
     2410      <p id="rfc.section.8.p.1">A "<dfn>representation</dfn>" is information in a format that can be readily communicated from one party to another. A resource representation is information
    24162411         that reflects the state of that resource, as observed at some point in the past (e.g., in a response to GET) or to be desired
    24172412         at some point in the future (e.g., in a PUT request).
    24182413      </p>
    2419       <p id="rfc.section.9.p.2">Most, but not all, representations transferred via HTTP are intended to be a representation of the target resource (the resource
     2414      <p id="rfc.section.8.p.2">Most, but not all, representations transferred via HTTP are intended to be a representation of the target resource (the resource
    24202415         identified by the effective request URI). The precise semantics of a representation are determined by the type of message
    24212416         (request or response), the request method, the response status code, and the representation metadata. For example, the above
     
    24262421         next steps are suggested for resolving it.
    24272422      </p>
    2428       <h2 id="rfc.section.9.1"><a href="#rfc.section.9.1">9.1</a>&nbsp;<a id="representation.header.fields" href="#representation.header.fields">Representation Header Fields</a></h2>
    2429       <p id="rfc.section.9.1.p.1">Representation header fields define metadata about the representation data enclosed in the message body or, if no message
     2423      <h2 id="rfc.section.8.1"><a href="#rfc.section.8.1">8.1</a>&nbsp;<a id="representation.header.fields" href="#representation.header.fields">Representation Header Fields</a></h2>
     2424      <p id="rfc.section.8.1.p.1">Representation header fields define metadata about the representation data enclosed in the message body or, if no message
    24302425         body is present, about the representation that would have been transferred in a 200 response to a simultaneous GET request
    24312426         with the same effective request URI.
    24322427      </p>
    2433       <p id="rfc.section.9.1.p.2">The following header fields are defined as representation metadata:</p>
     2428      <p id="rfc.section.8.1.p.2">The following header fields are defined as representation metadata:</p>
    24342429      <div id="rfc.table.u.5">
    24352430         <table class="tt full left" cellpadding="3" cellspacing="0">
     
    24432438               <tr>
    24442439                  <td class="left">Content-Encoding</td>
    2445                   <td class="left"><a href="#header.content-encoding" id="rfc.xref.header.content-encoding.2" title="Content-Encoding">Section&nbsp;11.15</a></td>
     2440                  <td class="left"><a href="#header.content-encoding" id="rfc.xref.header.content-encoding.2" title="Content-Encoding">Section&nbsp;10.15</a></td>
    24462441               </tr>
    24472442               <tr>
    24482443                  <td class="left">Content-Language</td>
    2449                   <td class="left"><a href="#header.content-language" id="rfc.xref.header.content-language.1" title="Content-Language">Section&nbsp;11.16</a></td>
     2444                  <td class="left"><a href="#header.content-language" id="rfc.xref.header.content-language.1" title="Content-Language">Section&nbsp;10.16</a></td>
    24502445               </tr>
    24512446               <tr>
    24522447                  <td class="left">Content-Location</td>
    2453                   <td class="left"><a href="#header.content-location" id="rfc.xref.header.content-location.2" title="Content-Location">Section&nbsp;11.17</a></td>
     2448                  <td class="left"><a href="#header.content-location" id="rfc.xref.header.content-location.2" title="Content-Location">Section&nbsp;10.17</a></td>
    24542449               </tr>
    24552450               <tr>
    24562451                  <td class="left">Content-Type</td>
    2457                   <td class="left"><a href="#header.content-type" id="rfc.xref.header.content-type.4" title="Content-Type">Section&nbsp;11.18</a></td>
     2452                  <td class="left"><a href="#header.content-type" id="rfc.xref.header.content-type.4" title="Content-Type">Section&nbsp;10.18</a></td>
    24582453               </tr>
    24592454               <tr>
     
    24642459         </table>
    24652460      </div>
    2466       <p id="rfc.section.9.1.p.3">Additional header fields define metadata about the selected representation, which might differ from the representation included
     2461      <p id="rfc.section.8.1.p.3">Additional header fields define metadata about the selected representation, which might differ from the representation included
    24672462         in the message for responses to some state-changing methods. The following header fields are defined as selected representation
    24682463         metadata:
     
    24882483         </table>
    24892484      </div>
    2490       <h2 id="rfc.section.9.2"><a href="#rfc.section.9.2">9.2</a>&nbsp;<a id="representation.data" href="#representation.data">Representation Data</a></h2>
    2491       <p id="rfc.section.9.2.p.1">The representation body associated with an HTTP message is either provided as the payload body of the message or referred
     2485      <h2 id="rfc.section.8.2"><a href="#rfc.section.8.2">8.2</a>&nbsp;<a id="representation.data" href="#representation.data">Representation Data</a></h2>
     2486      <p id="rfc.section.8.2.p.1">The representation body associated with an HTTP message is either provided as the payload body of the message or referred
    24922487         to by the message semantics and the effective request URI. The representation data is in a format and encoding defined by
    24932488         the representation metadata header fields.
    24942489      </p>
    2495       <p id="rfc.section.9.2.p.2">The data type of the representation data is determined via the header fields Content-Type and Content-Encoding. These define
     2490      <p id="rfc.section.8.2.p.2">The data type of the representation data is determined via the header fields Content-Type and Content-Encoding. These define
    24962491         a two-layer, ordered encoding model:
    24972492      </p>
    24982493      <div id="rfc.figure.u.24"></div><pre class="text">  representation-data := Content-Encoding( Content-Type( bits ) )
    2499 </pre><p id="rfc.section.9.2.p.4">Content-Type specifies the media type of the underlying data, which defines both the data format and how that data <em class="bcp14">SHOULD</em> be processed by the recipient (within the scope of the request method semantics). Any HTTP/1.1 message containing a payload
     2494</pre><p id="rfc.section.8.2.p.4">Content-Type specifies the media type of the underlying data, which defines both the data format and how that data <em class="bcp14">SHOULD</em> be processed by the recipient (within the scope of the request method semantics). Any HTTP/1.1 message containing a payload
    25002495         body <em class="bcp14">SHOULD</em> include a Content-Type header field defining the media type of the associated representation unless that metadata is unknown
    25012496         to the sender. If the Content-Type header field is not present, it indicates that the sender does not know the media type
    25022497         of the representation; recipients <em class="bcp14">MAY</em> either assume that the media type is "application/octet-stream" (<a href="#RFC2046" id="rfc.xref.RFC2046.3"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types">[RFC2046]</cite></a>, <a href="http://tools.ietf.org/html/rfc2046#section-4.5.1">Section 4.5.1</a>) or examine the content to determine its type.
    25032498      </p>
    2504       <p id="rfc.section.9.2.p.5">In practice, resource owners do not always properly configure their origin server to provide the correct Content-Type for
     2499      <p id="rfc.section.8.2.p.5">In practice, resource owners do not always properly configure their origin server to provide the correct Content-Type for
    25052500         a given representation, with the result that some clients will examine a response body's content and override the specified
    25062501         type. Clients that do so risk drawing incorrect conclusions, which might expose additional security risks (e.g., "privilege
     
    25092504         such "content sniffing" when it is used.
    25102505      </p>
    2511       <p id="rfc.section.9.2.p.6">Content-Encoding is used to indicate any additional content codings applied to the data, usually for the purpose of data compression,
     2506      <p id="rfc.section.8.2.p.6">Content-Encoding is used to indicate any additional content codings applied to the data, usually for the purpose of data compression,
    25122507         that are a property of the representation. If Content-Encoding is not present, then there is no additional encoding beyond
    25132508         that defined by the Content-Type.
    25142509      </p>
    2515       <h1 id="rfc.section.10"><a href="#rfc.section.10">10.</a>&nbsp;<a id="content.negotiation" href="#content.negotiation">Content Negotiation</a></h1>
    2516       <p id="rfc.section.10.p.1">HTTP responses include a representation which contains information for interpretation, whether by a human user or for further
     2510      <h1 id="rfc.section.9"><a href="#rfc.section.9">9.</a>&nbsp;<a id="content.negotiation" href="#content.negotiation">Content Negotiation</a></h1>
     2511      <p id="rfc.section.9.p.1">HTTP responses include a representation which contains information for interpretation, whether by a human user or for further
    25172512         processing. Often, the server has different ways of representing the same information; for example, in different formats,
    25182513         languages, or using different character encodings.
    25192514      </p>
    2520       <p id="rfc.section.10.p.2">HTTP clients and their users might have different or variable capabilities, characteristics or preferences which would influence
     2515      <p id="rfc.section.9.p.2">HTTP clients and their users might have different or variable capabilities, characteristics or preferences which would influence
    25212516         which representation, among those available from the server, would be best for the server to deliver. For this reason, HTTP
    25222517         provides mechanisms for "content negotiation" — a process of allowing selection of a representation of a given resource, when
    25232518         more than one is available.
    25242519      </p>
    2525       <p id="rfc.section.10.p.3">This specification defines two patterns of content negotiation; "server-driven", where the server selects the representation
     2520      <p id="rfc.section.9.p.3">This specification defines two patterns of content negotiation; "server-driven", where the server selects the representation
    25262521         based upon the client's stated preferences, and "agent-driven" negotiation, where the server provides a list of representations
    25272522         for the client to choose from, based upon their metadata. In addition, there are other patterns: some applications use an
     
    25292524         parameters, selects additional resources to invoke. "Transparent Content Negotiation" (<a href="#RFC2295" id="rfc.xref.RFC2295.1"><cite title="Transparent Content Negotiation in HTTP">[RFC2295]</cite></a>) has also been proposed.
    25302525      </p>
    2531       <p id="rfc.section.10.p.4">These patterns are all widely used, and have trade-offs in applicability and practicality. In particular, when the number
     2526      <p id="rfc.section.9.p.4">These patterns are all widely used, and have trade-offs in applicability and practicality. In particular, when the number
    25322527         of preferences or capabilities to be expressed by a client are large (such as when many different formats are supported by
    25332528         a user-agent), server-driven negotiation becomes unwieldy, and might not be appropriate. Conversely, when the number of representations
    25342529         to choose from is very large, agent-driven negotiation might not be appropriate.
    25352530      </p>
    2536       <p id="rfc.section.10.p.5">Note that in all cases, the supplier of representations has the responsibility for determining which representations might
     2531      <p id="rfc.section.9.p.5">Note that in all cases, the supplier of representations has the responsibility for determining which representations might
    25372532         be considered to be the "same information".
    25382533      </p>
    2539       <h2 id="rfc.section.10.1"><a href="#rfc.section.10.1">10.1</a>&nbsp;<a id="server-driven.negotiation" href="#server-driven.negotiation">Server-driven Negotiation</a></h2>
    2540       <p id="rfc.section.10.1.p.1">If the selection of the best representation for a response is made by an algorithm located at the server, it is called server-driven
     2534      <h2 id="rfc.section.9.1"><a href="#rfc.section.9.1">9.1</a>&nbsp;<a id="server-driven.negotiation" href="#server-driven.negotiation">Server-driven Negotiation</a></h2>
     2535      <p id="rfc.section.9.1.p.1">If the selection of the best representation for a response is made by an algorithm located at the server, it is called server-driven
    25412536         negotiation. Selection is based on the available representations of the response (the dimensions over which it can vary; e.g.,
    25422537         language, content-coding, etc.) and the contents of particular header fields in the request message or on other information
    25432538         pertaining to the request (such as the network address of the client).
    25442539      </p>
    2545       <p id="rfc.section.10.1.p.2">Server-driven negotiation is advantageous when the algorithm for selecting from among the available representations is difficult
     2540      <p id="rfc.section.9.1.p.2">Server-driven negotiation is advantageous when the algorithm for selecting from among the available representations is difficult
    25462541         to describe to the user agent, or when the server desires to send its "best guess" to the client along with the first response
    25472542         (hoping to avoid the round-trip delay of a subsequent request if the "best guess" is good enough for the user). In order to
    25482543         improve the server's guess, the user agent <em class="bcp14">MAY</em> include request header fields (Accept, Accept-Language, Accept-Encoding, etc.) which describe its preferences for such a response.
    25492544      </p>
    2550       <p id="rfc.section.10.1.p.3">Server-driven negotiation has disadvantages: </p>
     2545      <p id="rfc.section.9.1.p.3">Server-driven negotiation has disadvantages: </p>
    25512546      <ol>
    25522547         <li>It is impossible for the server to accurately determine what might be "best" for any given user, since that would require
     
    25602555         <li>It might limit a public cache's ability to use the same response for multiple user's requests.</li>
    25612556      </ol>
    2562       <p id="rfc.section.10.1.p.4">Server-driven negotiation allows the user agent to specify its preferences, but it cannot expect responses to always honor
     2557      <p id="rfc.section.9.1.p.4">Server-driven negotiation allows the user agent to specify its preferences, but it cannot expect responses to always honor
    25632558         them. For example, the origin server might not implement server-driven negotiation, or it might decide that sending a response
    25642559         that doesn't conform to them is better than sending a 406 (Not Acceptable) response.
    25652560      </p>
    2566       <p id="rfc.section.10.1.p.5">Many of the mechanisms for expressing preferences use quality values to declare relative preference. See qvalue; for more
     2561      <p id="rfc.section.9.1.p.5">Many of the mechanisms for expressing preferences use quality values to declare relative preference. See qvalue; for more
    25672562         information.
    25682563      </p>
    2569       <p id="rfc.section.10.1.p.6">HTTP/1.1 includes the following header fields for enabling server-driven negotiation through description of user agent capabilities
    2570          and user preferences: Accept (<a href="#header.accept" id="rfc.xref.header.accept.3" title="Accept">Section&nbsp;11.11</a>), Accept-Charset (<a href="#header.accept-charset" id="rfc.xref.header.accept-charset.2" title="Accept-Charset">Section&nbsp;11.12</a>), Accept-Encoding (<a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.3" title="Accept-Encoding">Section&nbsp;11.13</a>), Accept-Language (<a href="#header.accept-language" id="rfc.xref.header.accept-language.2" title="Accept-Language">Section&nbsp;11.14</a>), and User-Agent (<a href="#header.user-agent" id="rfc.xref.header.user-agent.2" title="User-Agent">Section&nbsp;11.10</a>). However, an origin server is not limited to these dimensions and <em class="bcp14">MAY</em> vary the response based on any aspect of the request, including aspects of the connection (e.g., IP address) or information
     2564      <p id="rfc.section.9.1.p.6">HTTP/1.1 includes the following header fields for enabling server-driven negotiation through description of user agent capabilities
     2565         and user preferences: Accept (<a href="#header.accept" id="rfc.xref.header.accept.3" title="Accept">Section&nbsp;10.11</a>), Accept-Charset (<a href="#header.accept-charset" id="rfc.xref.header.accept-charset.2" title="Accept-Charset">Section&nbsp;10.12</a>), Accept-Encoding (<a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.3" title="Accept-Encoding">Section&nbsp;10.13</a>), Accept-Language (<a href="#header.accept-language" id="rfc.xref.header.accept-language.2" title="Accept-Language">Section&nbsp;10.14</a>), and User-Agent (<a href="#header.user-agent" id="rfc.xref.header.user-agent.2" title="User-Agent">Section&nbsp;10.10</a>). However, an origin server is not limited to these dimensions and <em class="bcp14">MAY</em> vary the response based on any aspect of the request, including aspects of the connection (e.g., IP address) or information
    25712566         within extension header fields not defined by this specification.
    25722567      </p>
    2573       <div class="note" id="rfc.section.10.1.p.7">
     2568      <div class="note" id="rfc.section.9.1.p.7">
    25742569         <p> <b>Note:</b> In practice, User-Agent based negotiation is fragile, because new clients might not be recognized.
    25752570         </p>
    25762571      </div>
    2577       <p id="rfc.section.10.1.p.8">The Vary header field (<a href="p6-cache.html#header.vary" title="Vary">Section 3.5</a> of <a href="#Part6" id="rfc.xref.Part6.19"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) can be used to express the parameters the server uses to select a representation that is subject to server-driven negotiation.
    2578       </p>
    2579       <h2 id="rfc.section.10.2"><a href="#rfc.section.10.2">10.2</a>&nbsp;<a id="agent-driven.negotiation" href="#agent-driven.negotiation">Agent-driven Negotiation</a></h2>
    2580       <p id="rfc.section.10.2.p.1">With agent-driven negotiation, selection of the best representation for a response is performed by the user agent after receiving
     2572      <p id="rfc.section.9.1.p.8">The Vary header field (<a href="p6-cache.html#header.vary" title="Vary">Section 3.5</a> of <a href="#Part6" id="rfc.xref.Part6.19"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) can be used to express the parameters the server uses to select a representation that is subject to server-driven negotiation.
     2573      </p>
     2574      <h2 id="rfc.section.9.2"><a href="#rfc.section.9.2">9.2</a>&nbsp;<a id="agent-driven.negotiation" href="#agent-driven.negotiation">Agent-driven Negotiation</a></h2>
     2575      <p id="rfc.section.9.2.p.1">With agent-driven negotiation, selection of the best representation for a response is performed by the user agent after receiving
    25812576         an initial response from the origin server. Selection is based on a list of the available representations of the response
    25822577         included within the header fields or body of the initial response, with each representation identified by its own URI. Selection
     
    25842579         user selecting from a generated (possibly hypertext) menu.
    25852580      </p>
    2586       <p id="rfc.section.10.2.p.2">Agent-driven negotiation is advantageous when the response would vary over commonly-used dimensions (such as type, language,
     2581      <p id="rfc.section.9.2.p.2">Agent-driven negotiation is advantageous when the response would vary over commonly-used dimensions (such as type, language,
    25872582         or encoding), when the origin server is unable to determine a user agent's capabilities from examining the request, and generally
    25882583         when public caches are used to distribute server load and reduce network usage.
    25892584      </p>
    2590       <p id="rfc.section.10.2.p.3">Agent-driven negotiation suffers from the disadvantage of needing a second request to obtain the best alternate representation.
     2585      <p id="rfc.section.9.2.p.3">Agent-driven negotiation suffers from the disadvantage of needing a second request to obtain the best alternate representation.
    25912586         This second request is only efficient when caching is used. In addition, this specification does not define any mechanism
    25922587         for supporting automatic selection, though it also does not prevent any such mechanism from being developed as an extension
    25932588         and used within HTTP/1.1.
    25942589      </p>
    2595       <p id="rfc.section.10.2.p.4">This specification defines the 300 (Multiple Choices) and 406 (Not Acceptable) status codes for enabling agent-driven negotiation
     2590      <p id="rfc.section.9.2.p.4">This specification defines the 300 (Multiple Choices) and 406 (Not Acceptable) status codes for enabling agent-driven negotiation
    25962591         when the server is unwilling or unable to provide a varying response using server-driven negotiation.
    25972592      </p>
    2598       <h1 id="rfc.section.11"><a href="#rfc.section.11">11.</a>&nbsp;<a id="header.field.definitions" href="#header.field.definitions">Header Field Definitions</a></h1>
    2599       <p id="rfc.section.11.p.1">This section defines the syntax and semantics of HTTP/1.1 header fields related to request and response semantics, and to
     2593      <h1 id="rfc.section.10"><a href="#rfc.section.10">10.</a>&nbsp;<a id="header.field.definitions" href="#header.field.definitions">Header Field Definitions</a></h1>
     2594      <p id="rfc.section.10.p.1">This section defines the syntax and semantics of HTTP/1.1 header fields related to request and response semantics, and to
    26002595         the payload of messages.
    26012596      </p>
    26022597      <div id="rfc.iref.a.1"></div>
    26032598      <div id="rfc.iref.h.2"></div>
    2604       <h2 id="rfc.section.11.1"><a href="#rfc.section.11.1">11.1</a>&nbsp;<a id="header.allow" href="#header.allow">Allow</a></h2>
    2605       <p id="rfc.section.11.1.p.1">The "Allow" header field lists the set of methods advertised as supported by the target resource. The purpose of this field
     2599      <h2 id="rfc.section.10.1"><a href="#rfc.section.10.1">10.1</a>&nbsp;<a id="header.allow" href="#header.allow">Allow</a></h2>
     2600      <p id="rfc.section.10.1.p.1">The "Allow" header field lists the set of methods advertised as supported by the target resource. The purpose of this field
    26062601         is strictly to inform the recipient of valid request methods associated with the resource.
    26072602      </p>
    26082603      <div id="rfc.figure.u.25"></div><pre class="inline"><span id="rfc.iref.g.34"></span>  <a href="#header.allow" class="smpl">Allow</a> = #<a href="#methods" class="smpl">method</a>
    2609 </pre><p id="rfc.section.11.1.p.3">Example of use:</p>
     2604</pre><p id="rfc.section.10.1.p.3">Example of use:</p>
    26102605      <div id="rfc.figure.u.26"></div><pre class="text">  Allow: GET, HEAD, PUT
    2611 </pre><p id="rfc.section.11.1.p.5">The actual set of allowed methods is defined by the origin server at the time of each request.</p>
    2612       <p id="rfc.section.11.1.p.6">A proxy <em class="bcp14">MUST NOT</em> modify the Allow header field — it does not need to understand all the methods specified in order to handle them according
     2606</pre><p id="rfc.section.10.1.p.5">The actual set of allowed methods is defined by the origin server at the time of each request.</p>
     2607      <p id="rfc.section.10.1.p.6">A proxy <em class="bcp14">MUST NOT</em> modify the Allow header field — it does not need to understand all the methods specified in order to handle them according
    26132608         to the generic message handling rules.
    26142609      </p>
    26152610      <div id="rfc.iref.d.3"></div>
    26162611      <div id="rfc.iref.h.3"></div>
    2617       <h2 id="rfc.section.11.2"><a href="#rfc.section.11.2">11.2</a>&nbsp;<a id="header.date" href="#header.date">Date</a></h2>
    2618       <p id="rfc.section.11.2.p.1">The "Date" header field represents the date and time at which the message was originated, having the same semantics as the
     2612      <h2 id="rfc.section.10.2"><a href="#rfc.section.10.2">10.2</a>&nbsp;<a id="header.date" href="#header.date">Date</a></h2>
     2613      <p id="rfc.section.10.2.p.1">The "Date" header field represents the date and time at which the message was originated, having the same semantics as the
    26192614         Origination Date Field (orig-date) defined in <a href="http://tools.ietf.org/html/rfc5322#section-3.6.1">Section 3.6.1</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.2"><cite title="Internet Message Format">[RFC5322]</cite></a>. The field value is an HTTP-date, as defined in <a href="#http.date" title="Date/Time Formats">Section&nbsp;6.1</a>; it <em class="bcp14">MUST</em> be sent in rfc1123-date format.
    26202615      </p>
    26212616      <div id="rfc.figure.u.27"></div><pre class="inline"><span id="rfc.iref.g.35"></span>  <a href="#header.date" class="smpl">Date</a> = <a href="#http.date" class="smpl">HTTP-date</a>
    2622 </pre><p id="rfc.section.11.2.p.3">An example is</p>
     2617</pre><p id="rfc.section.10.2.p.3">An example is</p>
    26232618      <div id="rfc.figure.u.28"></div><pre class="text">  Date: Tue, 15 Nov 1994 08:12:31 GMT
    2624 </pre><p id="rfc.section.11.2.p.5">Origin servers <em class="bcp14">MUST</em> include a Date header field in all responses, except in these cases:
     2619</pre><p id="rfc.section.10.2.p.5">Origin servers <em class="bcp14">MUST</em> include a Date header field in all responses, except in these cases:
    26252620      </p>
    26262621      <ol>
     
    26332628         </li>
    26342629      </ol>
    2635       <p id="rfc.section.11.2.p.6">A received message that does not have a Date header field <em class="bcp14">MUST</em> be assigned one by the recipient if the message will be cached by that recipient.
    2636       </p>
    2637       <p id="rfc.section.11.2.p.7">Clients can use the Date header field as well; in order to keep request messages small, they are advised not to include it
     2630      <p id="rfc.section.10.2.p.6">A received message that does not have a Date header field <em class="bcp14">MUST</em> be assigned one by the recipient if the message will be cached by that recipient.
     2631      </p>
     2632      <p id="rfc.section.10.2.p.7">Clients can use the Date header field as well; in order to keep request messages small, they are advised not to include it
    26382633         when it doesn't convey any useful information (as is usually the case for requests that do not contain a payload).
    26392634      </p>
    2640       <p id="rfc.section.11.2.p.8">The HTTP-date sent in a Date header field <em class="bcp14">SHOULD NOT</em> represent a date and time subsequent to the generation of the message. It <em class="bcp14">SHOULD</em> represent the best available approximation of the date and time of message generation, unless the implementation has no means
     2635      <p id="rfc.section.10.2.p.8">The HTTP-date sent in a Date header field <em class="bcp14">SHOULD NOT</em> represent a date and time subsequent to the generation of the message. It <em class="bcp14">SHOULD</em> represent the best available approximation of the date and time of message generation, unless the implementation has no means
    26412636         of generating a reasonably accurate date and time. In theory, the date ought to represent the moment just before the payload
    26422637         is generated. In practice, the date can be generated at any time during the message origination without affecting its semantic
     
    26452640      <div id="rfc.iref.e.1"></div>
    26462641      <div id="rfc.iref.h.4"></div>
    2647       <h2 id="rfc.section.11.3"><a href="#rfc.section.11.3">11.3</a>&nbsp;<a id="header.expect" href="#header.expect">Expect</a></h2>
    2648       <p id="rfc.section.11.3.p.1">The "Expect" header field is used to indicate that particular server behaviors are required by the client.</p>
     2642      <h2 id="rfc.section.10.3"><a href="#rfc.section.10.3">10.3</a>&nbsp;<a id="header.expect" href="#header.expect">Expect</a></h2>
     2643      <p id="rfc.section.10.3.p.1">The "Expect" header field is used to indicate that particular server behaviors are required by the client.</p>
    26492644      <div id="rfc.figure.u.29"></div><pre class="inline"><span id="rfc.iref.g.36"></span><span id="rfc.iref.g.37"></span><span id="rfc.iref.g.38"></span><span id="rfc.iref.g.39"></span><span id="rfc.iref.g.40"></span>  <a href="#header.expect" class="smpl">Expect</a>       = 1#<a href="#header.expect" class="smpl">expectation</a>
    26502645 
     
    26552650  <a href="#header.expect" class="smpl">expect-name</a>  = <a href="#core.rules" class="smpl">token</a>
    26562651  <a href="#header.expect" class="smpl">expect-value</a> = <a href="#core.rules" class="smpl">token</a> / <a href="#core.rules" class="smpl">quoted-string</a>
    2657 </pre><p id="rfc.section.11.3.p.3">If all received Expect header field(s) are syntactically valid but contain an expectation that the recipient does not understand
     2652</pre><p id="rfc.section.10.3.p.3">If all received Expect header field(s) are syntactically valid but contain an expectation that the recipient does not understand
    26582653         or cannot comply with, the recipient <em class="bcp14">MUST</em> respond with a 417 (Expectation Failed) status code. A recipient of a syntactically invalid Expectation header field <em class="bcp14">MUST</em> respond with a 4xx status code other than 417.
    26592654      </p>
    2660       <p id="rfc.section.11.3.p.4">The only expectation defined by this specification is:</p>
    2661       <p id="rfc.section.11.3.p.5"><span id="rfc.iref.108"></span><span id="rfc.iref.e.2"></span> 100-continue
     2655      <p id="rfc.section.10.3.p.4">The only expectation defined by this specification is:</p>
     2656      <p id="rfc.section.10.3.p.5"><span id="rfc.iref.108"></span><span id="rfc.iref.e.2"></span> 100-continue
    26622657      </p>
    26632658      <ul class="empty">
     
    26652660         </li>
    26662661      </ul>
    2667       <p id="rfc.section.11.3.p.6">Comparison is case-insensitive for names (expect-name), and case-sensitive for values (expect-value).</p>
    2668       <p id="rfc.section.11.3.p.7">The Expect mechanism is hop-by-hop: the above requirements apply to any server, including proxies. However, the Expect header
     2662      <p id="rfc.section.10.3.p.6">Comparison is case-insensitive for names (expect-name), and case-sensitive for values (expect-value).</p>
     2663      <p id="rfc.section.10.3.p.7">The Expect mechanism is hop-by-hop: the above requirements apply to any server, including proxies. However, the Expect header
    26692664         field itself is end-to-end; it <em class="bcp14">MUST</em> be forwarded if the request is forwarded.
    26702665      </p>
    2671       <p id="rfc.section.11.3.p.8">Many older HTTP/1.0 and HTTP/1.1 applications do not understand the Expect header field.</p>
     2666      <p id="rfc.section.10.3.p.8">Many older HTTP/1.0 and HTTP/1.1 applications do not understand the Expect header field.</p>
    26722667      <div id="rfc.iref.f.1"></div>
    26732668      <div id="rfc.iref.h.5"></div>
    2674       <h2 id="rfc.section.11.4"><a href="#rfc.section.11.4">11.4</a>&nbsp;<a id="header.from" href="#header.from">From</a></h2>
    2675       <p id="rfc.section.11.4.p.1">The "From" header field, if given, <em class="bcp14">SHOULD</em> contain an Internet e-mail address for the human user who controls the requesting user agent. The address <em class="bcp14">SHOULD</em> be machine-usable, as defined by "mailbox" in <a href="http://tools.ietf.org/html/rfc5322#section-3.4">Section 3.4</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.3"><cite title="Internet Message Format">[RFC5322]</cite></a>:
     2669      <h2 id="rfc.section.10.4"><a href="#rfc.section.10.4">10.4</a>&nbsp;<a id="header.from" href="#header.from">From</a></h2>
     2670      <p id="rfc.section.10.4.p.1">The "From" header field, if given, <em class="bcp14">SHOULD</em> contain an Internet e-mail address for the human user who controls the requesting user agent. The address <em class="bcp14">SHOULD</em> be machine-usable, as defined by "mailbox" in <a href="http://tools.ietf.org/html/rfc5322#section-3.4">Section 3.4</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.3"><cite title="Internet Message Format">[RFC5322]</cite></a>:
    26762671      </p>
    26772672      <div id="rfc.figure.u.30"></div><pre class="inline"><span id="rfc.iref.g.41"></span>  <a href="#header.from" class="smpl">From</a>    = <a href="#header.from" class="smpl">mailbox</a>
    26782673 
    26792674  <a href="#header.from" class="smpl">mailbox</a> = &lt;mailbox, defined in <a href="#RFC5322" id="rfc.xref.RFC5322.4"><cite title="Internet Message Format">[RFC5322]</cite></a>, <a href="http://tools.ietf.org/html/rfc5322#section-3.4">Section 3.4</a>&gt;
    2680 </pre><p id="rfc.section.11.4.p.3">An example is:</p>
     2675</pre><p id="rfc.section.10.4.p.3">An example is:</p>
    26812676      <div id="rfc.figure.u.31"></div><pre class="text">  From: webmaster@example.org
    2682 </pre><p id="rfc.section.11.4.p.5">This header field <em class="bcp14">MAY</em> be used for logging purposes and as a means for identifying the source of invalid or unwanted requests. It <em class="bcp14">SHOULD NOT</em> be used as an insecure form of access protection. The interpretation of this field is that the request is being performed
     2677</pre><p id="rfc.section.10.4.p.5">This header field <em class="bcp14">MAY</em> be used for logging purposes and as a means for identifying the source of invalid or unwanted requests. It <em class="bcp14">SHOULD NOT</em> be used as an insecure form of access protection. The interpretation of this field is that the request is being performed
    26832678         on behalf of the person given, who accepts responsibility for the method performed. In particular, robot agents <em class="bcp14">SHOULD</em> include this header field so that the person responsible for running the robot can be contacted if problems occur on the receiving
    26842679         end.
    26852680      </p>
    2686       <p id="rfc.section.11.4.p.6">The Internet e-mail address in this field <em class="bcp14">MAY</em> be separate from the Internet host which issued the request. For example, when a request is passed through a proxy the original
     2681      <p id="rfc.section.10.4.p.6">The Internet e-mail address in this field <em class="bcp14">MAY</em> be separate from the Internet host which issued the request. For example, when a request is passed through a proxy the original
    26872682         issuer's address <em class="bcp14">SHOULD</em> be used.
    26882683      </p>
    2689       <p id="rfc.section.11.4.p.7">The client <em class="bcp14">SHOULD NOT</em> send the From header field without the user's approval, as it might conflict with the user's privacy interests or their site's
     2684      <p id="rfc.section.10.4.p.7">The client <em class="bcp14">SHOULD NOT</em> send the From header field without the user's approval, as it might conflict with the user's privacy interests or their site's
    26902685         security policy. It is strongly recommended that the user be able to disable, enable, and modify the value of this field at
    26912686         any time prior to a request.
     
    26932688      <div id="rfc.iref.l.1"></div>
    26942689      <div id="rfc.iref.h.6"></div>
    2695       <h2 id="rfc.section.11.5"><a href="#rfc.section.11.5">11.5</a>&nbsp;<a id="header.location" href="#header.location">Location</a></h2>
    2696       <p id="rfc.section.11.5.p.1">The "Location" header field <em class="bcp14">MAY</em> be sent in responses to refer to a specific resource in accordance with the semantics of the status code.
     2690      <h2 id="rfc.section.10.5"><a href="#rfc.section.10.5">10.5</a>&nbsp;<a id="header.location" href="#header.location">Location</a></h2>
     2691      <p id="rfc.section.10.5.p.1">The "Location" header field <em class="bcp14">MAY</em> be sent in responses to refer to a specific resource in accordance with the semantics of the status code.
    26972692      </p>
    26982693      <div id="rfc.figure.u.32"></div><pre class="inline"><span id="rfc.iref.g.42"></span>  <a href="#header.location" class="smpl">Location</a> = <a href="#abnf.dependencies" class="smpl">URI-reference</a>
    2699 </pre><p id="rfc.section.11.5.p.3">For 201 (Created) responses, the Location is the URI of the new resource which was created by the request. For 3xx responses,
     2694</pre><p id="rfc.section.10.5.p.3">For 201 (Created) responses, the Location is the URI of the new resource which was created by the request. For 3xx responses,
    27002695         the location <em class="bcp14">SHOULD</em> indicate the server's preferred URI for automatic redirection to the resource.
    27012696      </p>
    2702       <p id="rfc.section.11.5.p.4">The field value consists of a single URI-reference. When it has the form of a relative reference (<a href="#RFC3986" id="rfc.xref.RFC3986.1"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-4.2">Section 4.2</a>), the final value is computed by resolving it against the effective request URI (<a href="#RFC3986" id="rfc.xref.RFC3986.2"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-5">Section 5</a>). If the original URI, as navigated to by the user agent, did contain a fragment identifier, and the final value does not,
     2697      <p id="rfc.section.10.5.p.4">The field value consists of a single URI-reference. When it has the form of a relative reference (<a href="#RFC3986" id="rfc.xref.RFC3986.1"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-4.2">Section 4.2</a>), the final value is computed by resolving it against the effective request URI (<a href="#RFC3986" id="rfc.xref.RFC3986.2"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-5">Section 5</a>). If the original URI, as navigated to by the user agent, did contain a fragment identifier, and the final value does not,
    27032698         then the original URI's fragment identifier is added to the final value.
    27042699      </p>
     
    27092704      <p>An original URI "http://www.example.org/index.html#larry", combined with a field value given as:</p>  <pre class="text">  Location: http://www.example.net/index.html
    27102705</pre>  <p>would result in a final value of "http://www.example.net/index.html#larry", preserving the original fragment identifier.</p>
    2711       <div class="note" id="rfc.section.11.5.p.7">
     2706      <div class="note" id="rfc.section.10.5.p.7">
    27122707         <p> <b>Note:</b> Some recipients attempt to recover from Location fields that are not valid URI references. This specification does not mandate
    27132708            or define such processing, but does allow it (see <a href="#intro.conformance.and.error.handling" title="Conformance and Error Handling">Section&nbsp;1.2</a>).
    27142709         </p>
    27152710      </div>
    2716       <p id="rfc.section.11.5.p.8">There are circumstances in which a fragment identifier in a Location URI would not be appropriate. For instance, when it appears
     2711      <p id="rfc.section.10.5.p.8">There are circumstances in which a fragment identifier in a Location URI would not be appropriate. For instance, when it appears
    27172712         in a 201 Created response, where the Location header field specifies the URI for the entire created resource.
    27182713      </p>
    2719       <div class="note" id="rfc.section.11.5.p.9">
    2720          <p> <b>Note:</b> The Content-Location header field (<a href="#header.content-location" id="rfc.xref.header.content-location.3" title="Content-Location">Section&nbsp;11.17</a>) differs from Location in that the Content-Location identifies the most specific resource corresponding to the enclosed representation.
     2714      <div class="note" id="rfc.section.10.5.p.9">
     2715         <p> <b>Note:</b> The Content-Location header field (<a href="#header.content-location" id="rfc.xref.header.content-location.3" title="Content-Location">Section&nbsp;10.17</a>) differs from Location in that the Content-Location identifies the most specific resource corresponding to the enclosed representation.
    27212716            It is therefore possible for a response to contain header fields for both Location and Content-Location.
    27222717         </p>
     
    27242719      <div id="rfc.iref.m.9"></div>
    27252720      <div id="rfc.iref.h.7"></div>
    2726       <h2 id="rfc.section.11.6"><a href="#rfc.section.11.6">11.6</a>&nbsp;<a id="header.max-forwards" href="#header.max-forwards">Max-Forwards</a></h2>
    2727       <p id="rfc.section.11.6.p.1">The "Max-Forwards" header field provides a mechanism with the TRACE (<a href="#TRACE" id="rfc.xref.TRACE.1" title="TRACE">Section&nbsp;2.3.7</a>) and OPTIONS (<a href="#OPTIONS" id="rfc.xref.OPTIONS.1" title="OPTIONS">Section&nbsp;2.3.1</a>) methods to limit the number of times that the request is forwarded by proxies. This can be useful when the client is attempting
     2721      <h2 id="rfc.section.10.6"><a href="#rfc.section.10.6">10.6</a>&nbsp;<a id="header.max-forwards" href="#header.max-forwards">Max-Forwards</a></h2>
     2722      <p id="rfc.section.10.6.p.1">The "Max-Forwards" header field provides a mechanism with the TRACE (<a href="#TRACE" id="rfc.xref.TRACE.1" title="TRACE">Section&nbsp;2.3.7</a>) and OPTIONS (<a href="#OPTIONS" id="rfc.xref.OPTIONS.1" title="OPTIONS">Section&nbsp;2.3.1</a>) methods to limit the number of times that the request is forwarded by proxies. This can be useful when the client is attempting
    27282723         to trace a request which appears to be failing or looping mid-chain.
    27292724      </p>
    27302725      <div id="rfc.figure.u.35"></div><pre class="inline"><span id="rfc.iref.g.43"></span>  <a href="#header.max-forwards" class="smpl">Max-Forwards</a> = 1*<a href="#notation" class="smpl">DIGIT</a>
    2731 </pre><p id="rfc.section.11.6.p.3">The Max-Forwards value is a decimal integer indicating the remaining number of times this request message can be forwarded.</p>
    2732       <p id="rfc.section.11.6.p.4">Each recipient of a TRACE or OPTIONS request containing a Max-Forwards header field <em class="bcp14">MUST</em> check and update its value prior to forwarding the request. If the received value is zero (0), the recipient <em class="bcp14">MUST NOT</em> forward the request; instead, it <em class="bcp14">MUST</em> respond as the final recipient. If the received Max-Forwards value is greater than zero, then the forwarded message <em class="bcp14">MUST</em> contain an updated Max-Forwards field with a value decremented by one (1).
    2733       </p>
    2734       <p id="rfc.section.11.6.p.5">The Max-Forwards header field <em class="bcp14">MAY</em> be ignored for all other request methods.
     2726</pre><p id="rfc.section.10.6.p.3">The Max-Forwards value is a decimal integer indicating the remaining number of times this request message can be forwarded.</p>
     2727      <p id="rfc.section.10.6.p.4">Each recipient of a TRACE or OPTIONS request containing a Max-Forwards header field <em class="bcp14">MUST</em> check and update its value prior to forwarding the request. If the received value is zero (0), the recipient <em class="bcp14">MUST NOT</em> forward the request; instead, it <em class="bcp14">MUST</em> respond as the final recipient. If the received Max-Forwards value is greater than zero, then the forwarded message <em class="bcp14">MUST</em> contain an updated Max-Forwards field with a value decremented by one (1).
     2728      </p>
     2729      <p id="rfc.section.10.6.p.5">The Max-Forwards header field <em class="bcp14">MAY</em> be ignored for all other request methods.
    27352730      </p>
    27362731      <div id="rfc.iref.r.2"></div>
    27372732      <div id="rfc.iref.h.8"></div>
    2738       <h2 id="rfc.section.11.7"><a href="#rfc.section.11.7">11.7</a>&nbsp;<a id="header.referer" href="#header.referer">Referer</a></h2>
    2739       <p id="rfc.section.11.7.p.1">The "Referer" [sic] header field allows the client to specify the URI of the resource from which the target URI was obtained
     2733      <h2 id="rfc.section.10.7"><a href="#rfc.section.10.7">10.7</a>&nbsp;<a id="header.referer" href="#header.referer">Referer</a></h2>
     2734      <p id="rfc.section.10.7.p.1">The "Referer" [sic] header field allows the client to specify the URI of the resource from which the target URI was obtained
    27402735         (the "referrer", although the header field is misspelled.).
    27412736      </p>
    2742       <p id="rfc.section.11.7.p.2">The Referer header field allows servers to generate lists of back-links to resources for interest, logging, optimized caching,
     2737      <p id="rfc.section.10.7.p.2">The Referer header field allows servers to generate lists of back-links to resources for interest, logging, optimized caching,
    27432738         etc. It also allows obsolete or mistyped links to be traced for maintenance. Some servers use Referer as a means of controlling
    27442739         where they allow links from (so-called "deep linking"), but legitimate requests do not always contain a Referer header field.
    27452740      </p>
    2746       <p id="rfc.section.11.7.p.3">If the target URI was obtained from a source that does not have its own URI (e.g., input from the user keyboard), the Referer
     2741      <p id="rfc.section.10.7.p.3">If the target URI was obtained from a source that does not have its own URI (e.g., input from the user keyboard), the Referer
    27472742         field <em class="bcp14">MUST</em> either be sent with the value "about:blank", or not be sent at all. Note that this requirement does not apply to sources with
    27482743         non-HTTP URIs (e.g., FTP).
    27492744      </p>
    27502745      <div id="rfc.figure.u.36"></div><pre class="inline"><span id="rfc.iref.g.44"></span>  <a href="#header.referer" class="smpl">Referer</a> = <a href="#abnf.dependencies" class="smpl">absolute-URI</a> / <a href="#abnf.dependencies" class="smpl">partial-URI</a>
    2751 </pre><p id="rfc.section.11.7.p.5">Example:</p>
     2746</pre><p id="rfc.section.10.7.p.5">Example:</p>
    27522747      <div id="rfc.figure.u.37"></div><pre class="text">  Referer: http://www.example.org/hypertext/Overview.html
    2753 </pre><p id="rfc.section.11.7.p.7">If the field value is a relative URI, it <em class="bcp14">SHOULD</em> be interpreted relative to the effective request URI. The URI <em class="bcp14">MUST NOT</em> include a fragment. See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;13.2</a> for security considerations.
     2748</pre><p id="rfc.section.10.7.p.7">If the field value is a relative URI, it <em class="bcp14">SHOULD</em> be interpreted relative to the effective request URI. The URI <em class="bcp14">MUST NOT</em> include a fragment. See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;12.2</a> for security considerations.
    27542749      </p>
    27552750      <div id="rfc.iref.r.3"></div>
    27562751      <div id="rfc.iref.h.9"></div>
    2757       <h2 id="rfc.section.11.8"><a href="#rfc.section.11.8">11.8</a>&nbsp;<a id="header.retry-after" href="#header.retry-after">Retry-After</a></h2>
    2758       <p id="rfc.section.11.8.p.1">The header "Retry-After" field can be used with a 503 (Service Unavailable) response to indicate how long the service is expected
     2752      <h2 id="rfc.section.10.8"><a href="#rfc.section.10.8">10.8</a>&nbsp;<a id="header.retry-after" href="#header.retry-after">Retry-After</a></h2>
     2753      <p id="rfc.section.10.8.p.1">The header "Retry-After" field can be used with a 503 (Service Unavailable) response to indicate how long the service is expected
    27592754         to be unavailable to the requesting client. This field <em class="bcp14">MAY</em> also be used with any 3xx (Redirection) response to indicate the minimum time the user-agent is asked to wait before issuing
    27602755         the redirected request.
    27612756      </p>
    2762       <p id="rfc.section.11.8.p.2">The value of this field can be either an HTTP-date or an integer number of seconds (in decimal) after the time of the response.</p>
     2757      <p id="rfc.section.10.8.p.2">The value of this field can be either an HTTP-date or an integer number of seconds (in decimal) after the time of the response.</p>
    27632758      <div id="rfc.figure.u.38"></div><pre class="inline"><span id="rfc.iref.g.45"></span>  <a href="#header.retry-after" class="smpl">Retry-After</a> = <a href="#http.date" class="smpl">HTTP-date</a> / <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>
    27642759</pre><div id="rule.delta-seconds">
    2765          <p id="rfc.section.11.8.p.4">  Time spans are non-negative decimal integers, representing time in seconds.</p>
     2760         <p id="rfc.section.10.8.p.4">  Time spans are non-negative decimal integers, representing time in seconds.</p>
    27662761      </div>
    27672762      <div id="rfc.figure.u.39"></div><pre class="inline"><span id="rfc.iref.g.46"></span>  <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>  = 1*<a href="#notation" class="smpl">DIGIT</a>
    2768 </pre><p id="rfc.section.11.8.p.6">Two examples of its use are</p>
     2763</pre><p id="rfc.section.10.8.p.6">Two examples of its use are</p>
    27692764      <div id="rfc.figure.u.40"></div><pre class="text">  Retry-After: Fri, 31 Dec 1999 23:59:59 GMT
    27702765  Retry-After: 120
    2771 </pre><p id="rfc.section.11.8.p.8">In the latter example, the delay is 2 minutes.</p>
     2766</pre><p id="rfc.section.10.8.p.8">In the latter example, the delay is 2 minutes.</p>
    27722767      <div id="rfc.iref.s.39"></div>
    27732768      <div id="rfc.iref.h.10"></div>
    2774       <h2 id="rfc.section.11.9"><a href="#rfc.section.11.9">11.9</a>&nbsp;<a id="header.server" href="#header.server">Server</a></h2>
    2775       <p id="rfc.section.11.9.p.1">The "Server" header field contains information about the software used by the origin server to handle the request.</p>
    2776       <p id="rfc.section.11.9.p.2">The field can contain multiple product tokens (<a href="#product.tokens" title="Product Tokens">Section&nbsp;6.2</a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.46"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) identifying the server and any significant subproducts. The product tokens are listed in order of their significance for
     2769      <h2 id="rfc.section.10.9"><a href="#rfc.section.10.9">10.9</a>&nbsp;<a id="header.server" href="#header.server">Server</a></h2>
     2770      <p id="rfc.section.10.9.p.1">The "Server" header field contains information about the software used by the origin server to handle the request.</p>
     2771      <p id="rfc.section.10.9.p.2">The field can contain multiple product tokens (<a href="#product.tokens" title="Product Tokens">Section&nbsp;6.2</a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.46"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) identifying the server and any significant subproducts. The product tokens are listed in order of their significance for
    27772772         identifying the application.
    27782773      </p>
    27792774      <div id="rfc.figure.u.41"></div><pre class="inline"><span id="rfc.iref.g.47"></span>  <a href="#header.server" class="smpl">Server</a> = <a href="#product.tokens" class="smpl">product</a> *( <a href="#core.rules" class="smpl">RWS</a> ( <a href="#product.tokens" class="smpl">product</a> / <a href="#abnf.dependencies" class="smpl">comment</a> ) )
    2780 </pre><p id="rfc.section.11.9.p.4">Example:</p>
     2775</pre><p id="rfc.section.10.9.p.4">Example:</p>
    27812776      <div id="rfc.figure.u.42"></div><pre class="text">  Server: CERN/3.0 libwww/2.17
    2782 </pre><p id="rfc.section.11.9.p.6">If the response is being forwarded through a proxy, the proxy application <em class="bcp14">MUST NOT</em> modify the Server header field. Instead, it <em class="bcp14">MUST</em> include a Via field (as described in <a href="p1-messaging.html#header.via" title="Via">Section 6.2</a> of <a href="#Part1" id="rfc.xref.Part1.47"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    2783       </p>
    2784       <div class="note" id="rfc.section.11.9.p.7">
     2777</pre><p id="rfc.section.10.9.p.6">If the response is being forwarded through a proxy, the proxy application <em class="bcp14">MUST NOT</em> modify the Server header field. Instead, it <em class="bcp14">MUST</em> include a Via field (as described in <a href="p1-messaging.html#header.via" title="Via">Section 6.2</a> of <a href="#Part1" id="rfc.xref.Part1.47"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     2778      </p>
     2779      <div class="note" id="rfc.section.10.9.p.7">
    27852780         <p> <b>Note:</b> Revealing the specific software version of the server might allow the server machine to become more vulnerable to attacks
    27862781            against software that is known to contain security holes. Server implementors are encouraged to make this field a configurable
     
    27902785      <div id="rfc.iref.u.1"></div>
    27912786      <div id="rfc.iref.h.11"></div>
    2792       <h2 id="rfc.section.11.10"><a href="#rfc.section.11.10">11.10</a>&nbsp;<a id="header.user-agent" href="#header.user-agent">User-Agent</a></h2>
    2793       <p id="rfc.section.11.10.p.1">The "User-Agent" header field contains information about the user agent originating the request. User agents <em class="bcp14">SHOULD</em> include this field with requests.
    2794       </p>
    2795       <p id="rfc.section.11.10.p.2">Typically, it is used for statistical purposes, the tracing of protocol violations, and tailoring responses to avoid particular
     2787      <h2 id="rfc.section.10.10"><a href="#rfc.section.10.10">10.10</a>&nbsp;<a id="header.user-agent" href="#header.user-agent">User-Agent</a></h2>
     2788      <p id="rfc.section.10.10.p.1">The "User-Agent" header field contains information about the user agent originating the request. User agents <em class="bcp14">SHOULD</em> include this field with requests.
     2789      </p>
     2790      <p id="rfc.section.10.10.p.2">Typically, it is used for statistical purposes, the tracing of protocol violations, and tailoring responses to avoid particular
    27962791         user agent limitations.
    27972792      </p>
    2798       <p id="rfc.section.11.10.p.3">The field can contain multiple product tokens (<a href="#product.tokens" title="Product Tokens">Section&nbsp;6.2</a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.48"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) identifying the agent and its significant subproducts. By convention, the product tokens are listed in order of their significance
     2793      <p id="rfc.section.10.10.p.3">The field can contain multiple product tokens (<a href="#product.tokens" title="Product Tokens">Section&nbsp;6.2</a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.48"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) identifying the agent and its significant subproducts. By convention, the product tokens are listed in order of their significance
    27992794         for identifying the application.
    28002795      </p>
    2801       <p id="rfc.section.11.10.p.4">Because this field is usually sent on every request a user agent makes, implementations are encouraged not to include needlessly
     2796      <p id="rfc.section.10.10.p.4">Because this field is usually sent on every request a user agent makes, implementations are encouraged not to include needlessly
    28022797         fine-grained detail, and to limit (or even prohibit) the addition of subproducts by third parties. Overly long and detailed
    28032798         User-Agent field values make requests larger and can also be used to identify ("fingerprint") the user against their wishes.
    28042799      </p>
    2805       <p id="rfc.section.11.10.p.5">Likewise, implementations are encouraged not to use the product tokens of other implementations in order to declare compatibility
     2800      <p id="rfc.section.10.10.p.5">Likewise, implementations are encouraged not to use the product tokens of other implementations in order to declare compatibility
    28062801         with them, as this circumvents the purpose of the field. Finally, they are encouraged not to use comments to identify products;
    28072802         doing so makes the field value more difficult to parse.
    28082803      </p>
    28092804      <div id="rfc.figure.u.43"></div><pre class="inline"><span id="rfc.iref.g.48"></span>  <a href="#header.user-agent" class="smpl">User-Agent</a> = <a href="#product.tokens" class="smpl">product</a> *( <a href="#core.rules" class="smpl">RWS</a> ( <a href="#product.tokens" class="smpl">product</a> / <a href="#abnf.dependencies" class="smpl">comment</a> ) )
    2810 </pre><p id="rfc.section.11.10.p.7">Example:</p>
     2805</pre><p id="rfc.section.10.10.p.7">Example:</p>
    28112806      <div id="rfc.figure.u.44"></div><pre class="text">  User-Agent: CERN-LineMode/2.15 libwww/2.17b3
    28122807</pre><div id="rfc.iref.a.2"></div>
    28132808      <div id="rfc.iref.h.12"></div>
    2814       <h2 id="rfc.section.11.11"><a href="#rfc.section.11.11">11.11</a>&nbsp;<a id="header.accept" href="#header.accept">Accept</a></h2>
    2815       <p id="rfc.section.11.11.p.1">The "Accept" header field can be used by user agents to specify response media types that are acceptable. Accept header fields
     2809      <h2 id="rfc.section.10.11"><a href="#rfc.section.10.11">10.11</a>&nbsp;<a id="header.accept" href="#header.accept">Accept</a></h2>
     2810      <p id="rfc.section.10.11.p.1">The "Accept" header field can be used by user agents to specify response media types that are acceptable. Accept header fields
    28162811         can be used to indicate that the request is specifically limited to a small set of desired types, as in the case of a request
    28172812         for an in-line image.
     
    28252820  <a href="#header.accept" class="smpl">accept-params</a>  = <a href="#core.rules" class="smpl">OWS</a> ";" <a href="#core.rules" class="smpl">OWS</a> "q=" qvalue *( <a href="#header.accept" class="smpl">accept-ext</a> )
    28262821  <a href="#header.accept" class="smpl">accept-ext</a>     = <a href="#core.rules" class="smpl">OWS</a> ";" <a href="#core.rules" class="smpl">OWS</a> <a href="#core.rules" class="smpl">token</a> [ "=" word ]
    2827 </pre><p id="rfc.section.11.11.p.3">The asterisk "*" character is used to group media types into ranges, with "*/*" indicating all media types and "type/*" indicating
     2822</pre><p id="rfc.section.10.11.p.3">The asterisk "*" character is used to group media types into ranges, with "*/*" indicating all media types and "type/*" indicating
    28282823         all subtypes of that type. The media-range <em class="bcp14">MAY</em> include media type parameters that are applicable to that range.
    28292824      </p>
    2830       <p id="rfc.section.11.11.p.4">Each media-range <em class="bcp14">MAY</em> be followed by one or more accept-params, beginning with the "q" parameter for indicating a relative quality factor. The first
     2825      <p id="rfc.section.10.11.p.4">Each media-range <em class="bcp14">MAY</em> be followed by one or more accept-params, beginning with the "q" parameter for indicating a relative quality factor. The first
    28312826         "q" parameter (if any) separates the media-range parameter(s) from the accept-params. Quality factors allow the user or user
    28322827         agent to indicate the relative degree of preference for that media-range, using the qvalue scale from 0 to 1 (qvalue;). The
    28332828         default value is q=1.
    28342829      </p>
    2835       <div class="note" id="rfc.section.11.11.p.5">
     2830      <div class="note" id="rfc.section.10.11.p.5">
    28362831         <p> <b>Note:</b> Use of the "q" parameter name to separate media type parameters from Accept extension parameters is due to historical practice.
    28372832            Although this prevents any media type parameter named "q" from being used with a media range, such an event is believed to
     
    28402835         </p>
    28412836      </div>
    2842       <p id="rfc.section.11.11.p.6">The example</p>
     2837      <p id="rfc.section.10.11.p.6">The example</p>
    28432838      <div id="rfc.figure.u.46"></div><pre class="text">  Accept: audio/*; q=0.2, audio/basic
    2844 </pre><p id="rfc.section.11.11.p.8"> <em class="bcp14">SHOULD</em> be interpreted as "I prefer audio/basic, but send me any audio type if it is the best available after an 80% mark-down in
     2839</pre><p id="rfc.section.10.11.p.8"> <em class="bcp14">SHOULD</em> be interpreted as "I prefer audio/basic, but send me any audio type if it is the best available after an 80% mark-down in
    28452840         quality".
    28462841      </p>
    2847       <p id="rfc.section.11.11.p.9">A request without any Accept header field implies that the user agent will accept any media type in response. If an Accept
     2842      <p id="rfc.section.10.11.p.9">A request without any Accept header field implies that the user agent will accept any media type in response. If an Accept
    28482843         header field is present in a request and none of the available representations for the response have a media type that is
    28492844         listed as acceptable, the origin server <em class="bcp14">MAY</em> either honor the Accept header field by sending a 406 (Not Acceptable) response or disregard the Accept header field by treating
    28502845         the response as if it is not subject to content negotiation.
    28512846      </p>
    2852       <p id="rfc.section.11.11.p.10">A more elaborate example is</p>
     2847      <p id="rfc.section.10.11.p.10">A more elaborate example is</p>
    28532848      <div id="rfc.figure.u.47"></div><pre class="text">  Accept: text/plain; q=0.5, text/html,
    28542849          text/x-dvi; q=0.8, text/x-c
    2855 </pre><p id="rfc.section.11.11.p.12">Verbally, this would be interpreted as "text/html and text/x-c are the preferred media types, but if they do not exist, then
     2850</pre><p id="rfc.section.10.11.p.12">Verbally, this would be interpreted as "text/html and text/x-c are the preferred media types, but if they do not exist, then
    28562851         send the text/x-dvi representation, and if that does not exist, send the text/plain representation".
    28572852      </p>
    2858       <p id="rfc.section.11.11.p.13">Media ranges can be overridden by more specific media ranges or specific media types. If more than one media range applies
     2853      <p id="rfc.section.10.11.p.13">Media ranges can be overridden by more specific media ranges or specific media types. If more than one media range applies
    28592854         to a given type, the most specific reference has precedence. For example,
    28602855      </p>
    28612856      <div id="rfc.figure.u.48"></div><pre class="text">  Accept: text/*, text/plain, text/plain;format=flowed, */*
    2862 </pre><p id="rfc.section.11.11.p.15">have the following precedence: </p>
     2857</pre><p id="rfc.section.10.11.p.15">have the following precedence: </p>
    28632858      <ol>
    28642859         <li>text/plain;format=flowed</li>
     
    28672862         <li>*/*</li>
    28682863      </ol>
    2869       <p id="rfc.section.11.11.p.16">The media type quality factor associated with a given type is determined by finding the media range with the highest precedence
     2864      <p id="rfc.section.10.11.p.16">The media type quality factor associated with a given type is determined by finding the media range with the highest precedence
    28702865         which matches that type. For example,
    28712866      </p>
    28722867      <div id="rfc.figure.u.49"></div><pre class="text">  Accept: text/*;q=0.3, text/html;q=0.7, text/html;level=1,
    28732868          text/html;level=2;q=0.4, */*;q=0.5
    2874 </pre><p id="rfc.section.11.11.p.18">would cause the following values to be associated:</p>
     2869</pre><p id="rfc.section.10.11.p.18">would cause the following values to be associated:</p>
    28752870      <div id="rfc.table.u.7">
    28762871         <table class="tt full left" cellpadding="3" cellspacing="0">
     
    29092904         </table>
    29102905      </div>
    2911       <p id="rfc.section.11.11.p.19"> <b>Note:</b> A user agent might be provided with a default set of quality values for certain media ranges. However, unless the user agent
     2906      <p id="rfc.section.10.11.p.19"> <b>Note:</b> A user agent might be provided with a default set of quality values for certain media ranges. However, unless the user agent
    29122907         is a closed system which cannot interact with other rendering agents, this default set ought to be configurable by the user.
    29132908      </p>
    29142909      <div id="rfc.iref.a.3"></div>
    29152910      <div id="rfc.iref.h.13"></div>
    2916       <h2 id="rfc.section.11.12"><a href="#rfc.section.11.12">11.12</a>&nbsp;<a id="header.accept-charset" href="#header.accept-charset">Accept-Charset</a></h2>
    2917       <p id="rfc.section.11.12.p.1">The "Accept-Charset" header field can be used by user agents to indicate what character encodings are acceptable in a response
     2911      <h2 id="rfc.section.10.12"><a href="#rfc.section.10.12">10.12</a>&nbsp;<a id="header.accept-charset" href="#header.accept-charset">Accept-Charset</a></h2>
     2912      <p id="rfc.section.10.12.p.1">The "Accept-Charset" header field can be used by user agents to indicate what character encodings are acceptable in a response
    29182913         payload. This field allows clients capable of understanding more comprehensive or special-purpose character encodings to signal
    29192914         that capability to a server which is capable of representing documents in those character encodings.
     
    29212916      <div id="rfc.figure.u.50"></div><pre class="inline"><span id="rfc.iref.g.53"></span>  <a href="#header.accept-charset" class="smpl">Accept-Charset</a> = 1#( ( <a href="#rule.charset" class="smpl">charset</a> / "*" )
    29222917                         [ <a href="#core.rules" class="smpl">OWS</a> ";" <a href="#core.rules" class="smpl">OWS</a> "q=" qvalue ] )
    2923 </pre><p id="rfc.section.11.12.p.3">Character encoding values (a.k.a., charsets) are described in <a href="#character.sets" title="Character Encodings (charset)">Section&nbsp;7.1</a>. Each charset <em class="bcp14">MAY</em> be given an associated quality value which represents the user's preference for that charset. The default value is q=1. An
     2918</pre><p id="rfc.section.10.12.p.3">Character encoding values (a.k.a., charsets) are described in <a href="#character.sets" title="Character Encodings (charset)">Section&nbsp;6.3</a>. Each charset <em class="bcp14">MAY</em> be given an associated quality value which represents the user's preference for that charset. The default value is q=1. An
    29242919         example is
    29252920      </p>
    29262921      <div id="rfc.figure.u.51"></div><pre class="text">  Accept-Charset: iso-8859-5, unicode-1-1;q=0.8
    2927 </pre><p id="rfc.section.11.12.p.5">The special value "*", if present in the Accept-Charset field, matches every character encoding which is not mentioned elsewhere
     2922</pre><p id="rfc.section.10.12.p.5">The special value "*", if present in the Accept-Charset field, matches every character encoding which is not mentioned elsewhere
    29282923         in the Accept-Charset field. If no "*" is present in an Accept-Charset field, then all character encodings not explicitly
    29292924         mentioned get a quality value of 0.
    29302925      </p>
    2931       <p id="rfc.section.11.12.p.6">A request without any Accept-Charset header field implies that the user agent will accept any character encoding in response.
     2926      <p id="rfc.section.10.12.p.6">A request without any Accept-Charset header field implies that the user agent will accept any character encoding in response.
    29322927         If an Accept-Charset header field is present in a request and none of the available representations for the response have
    29332928         a character encoding that is listed as acceptable, the origin server <em class="bcp14">MAY</em> either honor the Accept-Charset header field by sending a 406 (Not Acceptable) response or disregard the Accept-Charset header
     
    29362931      <div id="rfc.iref.a.4"></div>
    29372932      <div id="rfc.iref.h.14"></div>
    2938       <h2 id="rfc.section.11.13"><a href="#rfc.section.11.13">11.13</a>&nbsp;<a id="header.accept-encoding" href="#header.accept-encoding">Accept-Encoding</a></h2>
    2939       <p id="rfc.section.11.13.p.1">The "Accept-Encoding" header field can be used by user agents to indicate what response content-codings (<a href="#content.codings" title="Content Codings">Section&nbsp;7.2</a>) are acceptable in the response. An "identity" token is used as a synonym for "no encoding" in order to communicate when
     2933      <h2 id="rfc.section.10.13"><a href="#rfc.section.10.13">10.13</a>&nbsp;<a id="header.accept-encoding" href="#header.accept-encoding">Accept-Encoding</a></h2>
     2934      <p id="rfc.section.10.13.p.1">The "Accept-Encoding" header field can be used by user agents to indicate what response content-codings (<a href="#content.codings" title="Content Codings">Section&nbsp;6.4</a>) are acceptable in the response. An "identity" token is used as a synonym for "no encoding" in order to communicate when
    29402935         no encoding is preferred.
    29412936      </p>
    29422937      <div id="rfc.figure.u.52"></div><pre class="inline"><span id="rfc.iref.g.54"></span><span id="rfc.iref.g.55"></span>  <a href="#header.accept-encoding" class="smpl">Accept-Encoding</a>  = #( <a href="#header.accept-encoding" class="smpl">codings</a> [ <a href="#core.rules" class="smpl">OWS</a> ";" <a href="#core.rules" class="smpl">OWS</a> "q=" qvalue ] )
    29432938  <a href="#header.accept-encoding" class="smpl">codings</a>          = <a href="#content.codings" class="smpl">content-coding</a> / "identity" / "*"
    2944 </pre><p id="rfc.section.11.13.p.3">Each codings value <em class="bcp14">MAY</em> be given an associated quality value which represents the preference for that encoding. The default value is q=1.
    2945       </p>
    2946       <p id="rfc.section.11.13.p.4">For example,</p>
     2939</pre><p id="rfc.section.10.13.p.3">Each codings value <em class="bcp14">MAY</em> be given an associated quality value which represents the preference for that encoding. The default value is q=1.
     2940      </p>
     2941      <p id="rfc.section.10.13.p.4">For example,</p>
    29472942      <div id="rfc.figure.u.53"></div><pre class="text">  Accept-Encoding: compress, gzip
    29482943  Accept-Encoding:
     
    29502945  Accept-Encoding: compress;q=0.5, gzip;q=1.0
    29512946  Accept-Encoding: gzip;q=1.0, identity; q=0.5, *;q=0
    2952 </pre><p id="rfc.section.11.13.p.6">A server tests whether a content-coding for a given representation is acceptable, according to an Accept-Encoding field, using
     2947</pre><p id="rfc.section.10.13.p.6">A server tests whether a content-coding for a given representation is acceptable, according to an Accept-Encoding field, using
    29532948         these rules:
    29542949      </p>
     
    29652960         <li>If multiple content-codings are acceptable, then the acceptable content-coding with the highest non-zero qvalue is preferred.</li>
    29662961      </ol>
    2967       <p id="rfc.section.11.13.p.7">An Accept-Encoding header field with a combined field-value that is empty implies that the user agent does not want any content-coding
     2962      <p id="rfc.section.10.13.p.7">An Accept-Encoding header field with a combined field-value that is empty implies that the user agent does not want any content-coding
    29682963         in response. If an Accept-Encoding header field is present in a request and none of the available representations for the
    29692964         response have a content-coding that is listed as acceptable, the origin server <em class="bcp14">SHOULD</em> send a response without any content-coding.
    29702965      </p>
    2971       <p id="rfc.section.11.13.p.8">A request without an Accept-Encoding header field implies that the user agent will accept any content-coding in response,
     2966      <p id="rfc.section.10.13.p.8">A request without an Accept-Encoding header field implies that the user agent will accept any content-coding in response,
    29722967         but a representation without content-coding is preferred for compatibility with the widest variety of user agents.
    29732968      </p>
    2974       <div class="note" id="rfc.section.11.13.p.9">
     2969      <div class="note" id="rfc.section.10.13.p.9">
    29752970         <p> <b>Note:</b> Most HTTP/1.0 applications do not recognize or obey qvalues associated with content-codings. This means that qvalues will
    29762971            not work and are not permitted with x-gzip or x-compress.
     
    29792974      <div id="rfc.iref.a.5"></div>
    29802975      <div id="rfc.iref.h.15"></div>
    2981       <h2 id="rfc.section.11.14"><a href="#rfc.section.11.14">11.14</a>&nbsp;<a id="header.accept-language" href="#header.accept-language">Accept-Language</a></h2>
    2982       <p id="rfc.section.11.14.p.1">The "Accept-Language" header field can be used by user agents to indicate the set of natural languages that are preferred
    2983          in the response. Language tags are defined in <a href="#language.tags" title="Language Tags">Section&nbsp;7.4</a>.
     2976      <h2 id="rfc.section.10.14"><a href="#rfc.section.10.14">10.14</a>&nbsp;<a id="header.accept-language" href="#header.accept-language">Accept-Language</a></h2>
     2977      <p id="rfc.section.10.14.p.1">The "Accept-Language" header field can be used by user agents to indicate the set of natural languages that are preferred
     2978         in the response. Language tags are defined in <a href="#language.tags" title="Language Tags">Section&nbsp;6.6</a>.
    29842979      </p>
    29852980      <div id="rfc.figure.u.54"></div><pre class="inline"><span id="rfc.iref.g.56"></span><span id="rfc.iref.g.57"></span>  <a href="#header.accept-language" class="smpl">Accept-Language</a> =
     
    29872982  <a href="#header.accept-language" class="smpl">language-range</a>  =
    29882983            &lt;language-range, defined in <a href="#RFC4647" id="rfc.xref.RFC4647.1"><cite title="Matching of Language Tags">[RFC4647]</cite></a>, <a href="http://tools.ietf.org/html/rfc4647#section-2.1">Section 2.1</a>&gt;
    2989 </pre><p id="rfc.section.11.14.p.3">Each language-range can be given an associated quality value which represents an estimate of the user's preference for the
     2984</pre><p id="rfc.section.10.14.p.3">Each language-range can be given an associated quality value which represents an estimate of the user's preference for the
    29902985         languages specified by that range. The quality value defaults to "q=1". For example,
    29912986      </p>
    29922987      <div id="rfc.figure.u.55"></div><pre class="text">  Accept-Language: da, en-gb;q=0.8, en;q=0.7
    2993 </pre><p id="rfc.section.11.14.p.5">would mean: "I prefer Danish, but will accept British English and other types of English". (see also <a href="http://tools.ietf.org/html/rfc4647#section-2.3">Section 2.3</a> of <a href="#RFC4647" id="rfc.xref.RFC4647.2"><cite title="Matching of Language Tags">[RFC4647]</cite></a>)
    2994       </p>
    2995       <p id="rfc.section.11.14.p.6">For matching, <a href="http://tools.ietf.org/html/rfc4647#section-3">Section 3</a> of <a href="#RFC4647" id="rfc.xref.RFC4647.3"><cite title="Matching of Language Tags">[RFC4647]</cite></a> defines several matching schemes. Implementations can offer the most appropriate matching scheme for their requirements.
    2996       </p>
    2997       <div class="note" id="rfc.section.11.14.p.7">
     2988</pre><p id="rfc.section.10.14.p.5">would mean: "I prefer Danish, but will accept British English and other types of English". (see also <a href="http://tools.ietf.org/html/rfc4647#section-2.3">Section 2.3</a> of <a href="#RFC4647" id="rfc.xref.RFC4647.2"><cite title="Matching of Language Tags">[RFC4647]</cite></a>)
     2989      </p>
     2990      <p id="rfc.section.10.14.p.6">For matching, <a href="http://tools.ietf.org/html/rfc4647#section-3">Section 3</a> of <a href="#RFC4647" id="rfc.xref.RFC4647.3"><cite title="Matching of Language Tags">[RFC4647]</cite></a> defines several matching schemes. Implementations can offer the most appropriate matching scheme for their requirements.
     2991      </p>
     2992      <div class="note" id="rfc.section.10.14.p.7">
    29982993         <p> <b>Note:</b> The "Basic Filtering" scheme (<a href="#RFC4647" id="rfc.xref.RFC4647.4"><cite title="Matching of Language Tags">[RFC4647]</cite></a>, <a href="http://tools.ietf.org/html/rfc4647#section-3.3.1">Section 3.3.1</a>) is identical to the matching scheme that was previously defined in <a href="http://tools.ietf.org/html/rfc2616#section-14.4">Section 14.4</a> of <a href="#RFC2616" id="rfc.xref.RFC2616.3"><cite title="Hypertext Transfer Protocol -- HTTP/1.1">[RFC2616]</cite></a>.
    29992994         </p>
    30002995      </div>
    3001       <p id="rfc.section.11.14.p.8">It might be contrary to the privacy expectations of the user to send an Accept-Language header field with the complete linguistic
    3002          preferences of the user in every request. For a discussion of this issue, see <a href="#privacy.issues.connected.to.accept.header.fields" title="Privacy Issues Connected to Accept Header Fields">Section&nbsp;13.5</a>.
    3003       </p>
    3004       <p id="rfc.section.11.14.p.9">As intelligibility is highly dependent on the individual user, it is recommended that client applications make the choice
     2996      <p id="rfc.section.10.14.p.8">It might be contrary to the privacy expectations of the user to send an Accept-Language header field with the complete linguistic
     2997         preferences of the user in every request. For a discussion of this issue, see <a href="#privacy.issues.connected.to.accept.header.fields" title="Privacy Issues Connected to Accept Header Fields">Section&nbsp;12.5</a>.
     2998      </p>
     2999      <p id="rfc.section.10.14.p.9">As intelligibility is highly dependent on the individual user, it is recommended that client applications make the choice
    30053000         of linguistic preference available to the user. If the choice is not made available, then the Accept-Language header field <em class="bcp14">MUST NOT</em> be given in the request.
    30063001      </p>
    3007       <div class="note" id="rfc.section.11.14.p.10">
     3002      <div class="note" id="rfc.section.10.14.p.10">
    30083003         <p> <b>Note:</b> When making the choice of linguistic preference available to the user, we remind implementors of the fact that users are not
    30093004            familiar with the details of language matching as described above, and ought to be provided appropriate guidance. As an example,
     
    30143009      <div id="rfc.iref.c.7"></div>
    30153010      <div id="rfc.iref.h.16"></div>
    3016       <h2 id="rfc.section.11.15"><a href="#rfc.section.11.15">11.15</a>&nbsp;<a id="header.content-encoding" href="#header.content-encoding">Content-Encoding</a></h2>
    3017       <p id="rfc.section.11.15.p.1">The "Content-Encoding" header field indicates what content-codings have been applied to the representation beyond those inherent
     3011      <h2 id="rfc.section.10.15"><a href="#rfc.section.10.15">10.15</a>&nbsp;<a id="header.content-encoding" href="#header.content-encoding">Content-Encoding</a></h2>
     3012      <p id="rfc.section.10.15.p.1">The "Content-Encoding" header field indicates what content-codings have been applied to the representation beyond those inherent
    30183013         in the media type, and thus what decoding mechanisms have to be applied in order to obtain the media-type referenced by the
    30193014         Content-Type header field. Content-Encoding is primarily used to allow a representation to be compressed without losing the
     
    30213016      </p>
    30223017      <div id="rfc.figure.u.56"></div><pre class="inline"><span id="rfc.iref.g.58"></span>  <a href="#header.content-encoding" class="smpl">Content-Encoding</a> = 1#<a href="#content.codings" class="smpl">content-coding</a>
    3023 </pre><p id="rfc.section.11.15.p.3">Content codings are defined in <a href="#content.codings" title="Content Codings">Section&nbsp;7.2</a>. An example of its use is
     3018</pre><p id="rfc.section.10.15.p.3">Content codings are defined in <a href="#content.codings" title="Content Codings">Section&nbsp;6.4</a>. An example of its use is
    30243019      </p>
    30253020      <div id="rfc.figure.u.57"></div><pre class="text">  Content-Encoding: gzip
    3026 </pre><p id="rfc.section.11.15.p.5">The content-coding is a characteristic of the representation. Typically, the representation body is stored with this encoding
     3021</pre><p id="rfc.section.10.15.p.5">The content-coding is a characteristic of the representation. Typically, the representation body is stored with this encoding
    30273022         and is only decoded before rendering or analogous usage. However, a transforming proxy <em class="bcp14">MAY</em> modify the content-coding if the new coding is known to be acceptable to the recipient, unless the "no-transform" cache-control
    30283023         directive is present in the message.
    30293024      </p>
    3030       <p id="rfc.section.11.15.p.6">If the media type includes an inherent encoding, such as a data format that is always compressed, then that encoding would
     3025      <p id="rfc.section.10.15.p.6">If the media type includes an inherent encoding, such as a data format that is always compressed, then that encoding would
    30313026         not be restated as a Content-Encoding even if it happens to be the same algorithm as one of the content-codings. Such a content-coding
    30323027         would only be listed if, for some bizarre reason, it is applied a second time to form the representation. Likewise, an origin
     
    30353030         response (e.g., open a "Save as ..." dialog instead of automatic decompression and rendering of content).
    30363031      </p>
    3037       <p id="rfc.section.11.15.p.7">A representation that has a content-coding applied to it <em class="bcp14">MUST</em> include a Content-Encoding header field (<a href="#header.content-encoding" id="rfc.xref.header.content-encoding.3" title="Content-Encoding">Section&nbsp;11.15</a>) that lists the content-coding(s) applied.
    3038       </p>
    3039       <p id="rfc.section.11.15.p.8">If multiple encodings have been applied to a representation, the content codings <em class="bcp14">MUST</em> be listed in the order in which they were applied. Additional information about the encoding parameters <em class="bcp14">MAY</em> be provided by other header fields not defined by this specification.
    3040       </p>
    3041       <p id="rfc.section.11.15.p.9">If the content-coding of a representation in a request message is not acceptable to the origin server, the server <em class="bcp14">SHOULD</em> respond with a status code of 415 (Unsupported Media Type).
     3032      <p id="rfc.section.10.15.p.7">A representation that has a content-coding applied to it <em class="bcp14">MUST</em> include a Content-Encoding header field (<a href="#header.content-encoding" id="rfc.xref.header.content-encoding.3" title="Content-Encoding">Section&nbsp;10.15</a>) that lists the content-coding(s) applied.
     3033      </p>
     3034      <p id="rfc.section.10.15.p.8">If multiple encodings have been applied to a representation, the content codings <em class="bcp14">MUST</em> be listed in the order in which they were applied. Additional information about the encoding parameters <em class="bcp14">MAY</em> be provided by other header fields not defined by this specification.
     3035      </p>
     3036      <p id="rfc.section.10.15.p.9">If the content-coding of a representation in a request message is not acceptable to the origin server, the server <em class="bcp14">SHOULD</em> respond with a status code of 415 (Unsupported Media Type).
    30423037      </p>
    30433038      <div id="rfc.iref.c.8"></div>
    30443039      <div id="rfc.iref.h.17"></div>
    3045       <h2 id="rfc.section.11.16"><a href="#rfc.section.11.16">11.16</a>&nbsp;<a id="header.content-language" href="#header.content-language">Content-Language</a></h2>
    3046       <p id="rfc.section.11.16.p.1">The "Content-Language" header field describes the natural language(s) of the intended audience for the representation. Note
     3040      <h2 id="rfc.section.10.16"><a href="#rfc.section.10.16">10.16</a>&nbsp;<a id="header.content-language" href="#header.content-language">Content-Language</a></h2>
     3041      <p id="rfc.section.10.16.p.1">The "Content-Language" header field describes the natural language(s) of the intended audience for the representation. Note
    30473042         that this might not be equivalent to all the languages used within the representation.
    30483043      </p>
    30493044      <div id="rfc.figure.u.58"></div><pre class="inline"><span id="rfc.iref.g.59"></span>  <a href="#header.content-language" class="smpl">Content-Language</a> = 1#<a href="#language.tags" class="smpl">language-tag</a>
    3050 </pre><p id="rfc.section.11.16.p.3">Language tags are defined in <a href="#language.tags" title="Language Tags">Section&nbsp;7.4</a>. The primary purpose of Content-Language is to allow a user to identify and differentiate representations according to the
     3045</pre><p id="rfc.section.10.16.p.3">Language tags are defined in <a href="#language.tags" title="Language Tags">Section&nbsp;6.6</a>. The primary purpose of Content-Language is to allow a user to identify and differentiate representations according to the
    30513046         user's own preferred language. Thus, if the body content is intended only for a Danish-literate audience, the appropriate
    30523047         field is
    30533048      </p>
    30543049      <div id="rfc.figure.u.59"></div><pre class="text">  Content-Language: da
    3055 </pre><p id="rfc.section.11.16.p.5">If no Content-Language is specified, the default is that the content is intended for all language audiences. This might mean
     3050</pre><p id="rfc.section.10.16.p.5">If no Content-Language is specified, the default is that the content is intended for all language audiences. This might mean
    30563051         that the sender does not consider it to be specific to any natural language, or that the sender does not know for which language
    30573052         it is intended.
    30583053      </p>
    3059       <p id="rfc.section.11.16.p.6">Multiple languages <em class="bcp14">MAY</em> be listed for content that is intended for multiple audiences. For example, a rendition of the "Treaty of Waitangi", presented
     3054      <p id="rfc.section.10.16.p.6">Multiple languages <em class="bcp14">MAY</em> be listed for content that is intended for multiple audiences. For example, a rendition of the "Treaty of Waitangi", presented
    30603055         simultaneously in the original Maori and English versions, would call for
    30613056      </p>
    30623057      <div id="rfc.figure.u.60"></div><pre class="text">  Content-Language: mi, en
    3063 </pre><p id="rfc.section.11.16.p.8">However, just because multiple languages are present within a representation does not mean that it is intended for multiple
     3058</pre><p id="rfc.section.10.16.p.8">However, just because multiple languages are present within a representation does not mean that it is intended for multiple
    30643059         linguistic audiences. An example would be a beginner's language primer, such as "A First Lesson in Latin", which is clearly
    30653060         intended to be used by an English-literate audience. In this case, the Content-Language would properly only include "en".
    30663061      </p>
    3067       <p id="rfc.section.11.16.p.9">Content-Language <em class="bcp14">MAY</em> be applied to any media type — it is not limited to textual documents.
     3062      <p id="rfc.section.10.16.p.9">Content-Language <em class="bcp14">MAY</em> be applied to any media type — it is not limited to textual documents.
    30683063      </p>
    30693064      <div id="rfc.iref.c.9"></div>
    30703065      <div id="rfc.iref.h.18"></div>
    3071       <h2 id="rfc.section.11.17"><a href="#rfc.section.11.17">11.17</a>&nbsp;<a id="header.content-location" href="#header.content-location">Content-Location</a></h2>
    3072       <p id="rfc.section.11.17.p.1">The "Content-Location" header field supplies a URI that can be used as a specific identifier for the representation in this
     3066      <h2 id="rfc.section.10.17"><a href="#rfc.section.10.17">10.17</a>&nbsp;<a id="header.content-location" href="#header.content-location">Content-Location</a></h2>
     3067      <p id="rfc.section.10.17.p.1">The "Content-Location" header field supplies a URI that can be used as a specific identifier for the representation in this
    30733068         message. In other words, if one were to perform a GET on this URI at the time of this message's generation, then a 200 response
    30743069         would contain the same representation that is enclosed as payload in this message.
    30753070      </p>
    30763071      <div id="rfc.figure.u.61"></div><pre class="inline"><span id="rfc.iref.g.60"></span>  <a href="#header.content-location" class="smpl">Content-Location</a> = <a href="#abnf.dependencies" class="smpl">absolute-URI</a> / <a href="#abnf.dependencies" class="smpl">partial-URI</a>
    3077 </pre><p id="rfc.section.11.17.p.3">The Content-Location value is not a replacement for the effective Request URI (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 5.5</a> of <a href="#Part1" id="rfc.xref.Part1.49"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). It is representation metadata. It has the same syntax and semantics as the header field of the same name defined for MIME
     3072</pre><p id="rfc.section.10.17.p.3">The Content-Location value is not a replacement for the effective Request URI (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 5.5</a> of <a href="#Part1" id="rfc.xref.Part1.49"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). It is representation metadata. It has the same syntax and semantics as the header field of the same name defined for MIME
    30783073         body parts in <a href="http://tools.ietf.org/html/rfc2557#section-4">Section 4</a> of <a href="#RFC2557" id="rfc.xref.RFC2557.1"><cite title="MIME Encapsulation of Aggregate Documents, such as HTML (MHTML)">[RFC2557]</cite></a>. However, its appearance in an HTTP message has some special implications for HTTP recipients.
    30793074      </p>
    3080       <p id="rfc.section.11.17.p.4">If Content-Location is included in a response message and its value is the same as the effective request URI, then the response
     3075      <p id="rfc.section.10.17.p.4">If Content-Location is included in a response message and its value is the same as the effective request URI, then the response
    30813076         payload <em class="bcp14">SHOULD</em> be considered a current representation of that resource. For a GET or HEAD request, this is the same as the default semantics
    30823077         when no Content-Location is provided by the server. For a state-changing request like PUT or POST, it implies that the server's
     
    30853080         need for a subsequent GET request.
    30863081      </p>
    3087       <p id="rfc.section.11.17.p.5">If Content-Location is included in a response message and its value differs from the effective request URI, then the origin
     3082      <p id="rfc.section.10.17.p.5">If Content-Location is included in a response message and its value differs from the effective request URI, then the origin
    30883083         server is informing recipients that this representation has its own, presumably more specific, identifier. For a GET or HEAD
    30893084         request, this is an indication that the effective request URI identifies a resource that is subject to content negotiation
     
    30943089         in the future.
    30953090      </p>
    3096       <p id="rfc.section.11.17.p.6">If Content-Location is included in a request message, then it <em class="bcp14">MAY</em> be interpreted by the origin server as an indication of where the user agent originally obtained the content of the enclosed
     3091      <p id="rfc.section.10.17.p.6">If Content-Location is included in a request message, then it <em class="bcp14">MAY</em> be interpreted by the origin server as an indication of where the user agent originally obtained the content of the enclosed
    30973092         representation (prior to any subsequent modification of the content by that user agent). In other words, the user agent is
    30983093         providing the same representation metadata that it received with the original representation. However, such interpretation <em class="bcp14">MUST NOT</em> be used to alter the semantics of the method requested by the client. For example, if a client makes a PUT request on a negotiated
     
    31023097         latter semantics, it would have applied the PUT directly to the Content-Location URI.
    31033098      </p>
    3104       <p id="rfc.section.11.17.p.7">A Content-Location field received in a request message is transitory information that <em class="bcp14">SHOULD NOT</em> be saved with other representation metadata for use in later responses. The Content-Location's value might be saved for use
     3099      <p id="rfc.section.10.17.p.7">A Content-Location field received in a request message is transitory information that <em class="bcp14">SHOULD NOT</em> be saved with other representation metadata for use in later responses. The Content-Location's value might be saved for use
    31053100         in other contexts, such as within source links or other metadata.
    31063101      </p>
    3107       <p id="rfc.section.11.17.p.8">A cache cannot assume that a representation with a Content-Location different from the URI used to retrieve it can be used
     3102      <p id="rfc.section.10.17.p.8">A cache cannot assume that a representation with a Content-Location different from the URI used to retrieve it can be used
    31083103         to respond to later requests on that Content-Location URI.
    31093104      </p>
    3110       <p id="rfc.section.11.17.p.9">If the Content-Location value is a partial URI, the partial URI is interpreted relative to the effective request URI.</p>
     3105      <p id="rfc.section.10.17.p.9">If the Content-Location value is a partial URI, the partial URI is interpreted relative to the effective request URI.</p>
    31113106      <div id="rfc.iref.c.10"></div>
    31123107      <div id="rfc.iref.h.19"></div>
    3113       <h2 id="rfc.section.11.18"><a href="#rfc.section.11.18">11.18</a>&nbsp;<a id="header.content-type" href="#header.content-type">Content-Type</a></h2>
    3114       <p id="rfc.section.11.18.p.1">The "Content-Type" header field indicates the media type of the representation. In the case of responses to the HEAD method,
     3108      <h2 id="rfc.section.10.18"><a href="#rfc.section.10.18">10.18</a>&nbsp;<a id="header.content-type" href="#header.content-type">Content-Type</a></h2>
     3109      <p id="rfc.section.10.18.p.1">The "Content-Type" header field indicates the media type of the representation. In the case of responses to the HEAD method,
    31153110         the media type is that which would have been sent had the request been a GET.
    31163111      </p>
    31173112      <div id="rfc.figure.u.62"></div><pre class="inline"><span id="rfc.iref.g.61"></span>  <a href="#header.content-type" class="smpl">Content-Type</a> = <a href="#media.types" class="smpl">media-type</a>
    3118 </pre><p id="rfc.section.11.18.p.3">Media types are defined in <a href="#media.types" title="Media Types">Section&nbsp;7.3</a>. An example of the field is
     3113</pre><p id="rfc.section.10.18.p.3">Media types are defined in <a href="#media.types" title="Media Types">Section&nbsp;6.5</a>. An example of the field is
    31193114      </p>
    31203115      <div id="rfc.figure.u.63"></div><pre class="text">  Content-Type: text/html; charset=ISO-8859-4
    3121 </pre><p id="rfc.section.11.18.p.5">Further discussion of Content-Type is provided in <a href="#representation.data" title="Representation Data">Section&nbsp;9.2</a>.
    3122       </p>
    3123       <h1 id="rfc.section.12"><a href="#rfc.section.12">12.</a>&nbsp;<a id="IANA.considerations" href="#IANA.considerations">IANA Considerations</a></h1>
    3124       <h2 id="rfc.section.12.1"><a href="#rfc.section.12.1">12.1</a>&nbsp;<a id="method.registration" href="#method.registration">Method Registry</a></h2>
    3125       <p id="rfc.section.12.1.p.1">The registration procedure for HTTP request methods is defined by <a href="#method.registry" title="Method Registry">Section&nbsp;2.2</a> of this document.
    3126       </p>
    3127       <p id="rfc.section.12.1.p.2">The HTTP Method Registry shall be created at &lt;<a href="http://www.iana.org/assignments/http-methods">http://www.iana.org/assignments/http-methods</a>&gt; and be populated with the registrations below:
     3116</pre><p id="rfc.section.10.18.p.5">Further discussion of Content-Type is provided in <a href="#representation.data" title="Representation Data">Section&nbsp;8.2</a>.
     3117      </p>
     3118      <h1 id="rfc.section.11"><a href="#rfc.section.11">11.</a>&nbsp;<a id="IANA.considerations" href="#IANA.considerations">IANA Considerations</a></h1>
     3119      <h2 id="rfc.section.11.1"><a href="#rfc.section.11.1">11.1</a>&nbsp;<a id="method.registration" href="#method.registration">Method Registry</a></h2>
     3120      <p id="rfc.section.11.1.p.1">The registration procedure for HTTP request methods is defined by <a href="#method.registry" title="Method Registry">Section&nbsp;2.2</a> of this document.
     3121      </p>
     3122      <p id="rfc.section.11.1.p.2">The HTTP Method Registry shall be created at &lt;<a href="http://www.iana.org/assignments/http-methods">http://www.iana.org/assignments/http-methods</a>&gt; and be populated with the registrations below:
    31283123      </p>
    31293124      <div id="rfc.table.1">
     
    31893184         </table>
    31903185      </div>
    3191       <h2 id="rfc.section.12.2"><a href="#rfc.section.12.2">12.2</a>&nbsp;<a id="status.code.registration" href="#status.code.registration">Status Code Registry</a></h2>
    3192       <p id="rfc.section.12.2.p.1">The registration procedure for HTTP Status Codes — previously defined in <a href="http://tools.ietf.org/html/rfc2817#section-7.1">Section 7.1</a> of <a href="#RFC2817" id="rfc.xref.RFC2817.1"><cite title="Upgrading to TLS Within HTTP/1.1">[RFC2817]</cite></a> — is now defined by <a href="#status.code.registry" title="Status Code Registry">Section&nbsp;4.2</a> of this document.
    3193       </p>
    3194       <p id="rfc.section.12.2.p.2">The HTTP Status Code Registry located at &lt;<a href="http://www.iana.org/assignments/http-status-codes">http://www.iana.org/assignments/http-status-codes</a>&gt; shall be updated with the registrations below:
     3186      <h2 id="rfc.section.11.2"><a href="#rfc.section.11.2">11.2</a>&nbsp;<a id="status.code.registration" href="#status.code.registration">Status Code Registry</a></h2>
     3187      <p id="rfc.section.11.2.p.1">The registration procedure for HTTP Status Codes — previously defined in <a href="http://tools.ietf.org/html/rfc2817#section-7.1">Section 7.1</a> of <a href="#RFC2817" id="rfc.xref.RFC2817.1"><cite title="Upgrading to TLS Within HTTP/1.1">[RFC2817]</cite></a> — is now defined by <a href="#status.code.registry" title="Status Code Registry">Section&nbsp;4.2</a> of this document.
     3188      </p>
     3189      <p id="rfc.section.11.2.p.2">The HTTP Status Code Registry located at &lt;<a href="http://www.iana.org/assignments/http-status-codes">http://www.iana.org/assignments/http-status-codes</a>&gt; shall be updated with the registrations below:
    31953190      </p>
    31963191      <div id="rfc.table.2">
     
    34243419         </table>
    34253420      </div>
    3426       <h2 id="rfc.section.12.3"><a href="#rfc.section.12.3">12.3</a>&nbsp;<a id="header.field.registration" href="#header.field.registration">Header Field Registration</a></h2>
    3427       <p id="rfc.section.12.3.p.1">The Message Header Field Registry located at &lt;<a href="http://www.iana.org/assignments/message-headers/message-header-index.html">http://www.iana.org/assignments/message-headers/message-header-index.html</a>&gt; shall be updated with the permanent registrations below (see <a href="#RFC3864" id="rfc.xref.RFC3864.3"><cite title="Registration Procedures for Message Header Fields">[RFC3864]</cite></a>):
     3421      <h2 id="rfc.section.11.3"><a href="#rfc.section.11.3">11.3</a>&nbsp;<a id="header.field.registration" href="#header.field.registration">Header Field Registration</a></h2>
     3422      <p id="rfc.section.11.3.p.1">The Message Header Field Registry located at &lt;<a href="http://www.iana.org/assignments/message-headers/message-header-index.html">http://www.iana.org/assignments/message-headers/message-header-index.html</a>&gt; shall be updated with the permanent registrations below (see <a href="#RFC3864" id="rfc.xref.RFC3864.3"><cite title="Registration Procedures for Message Header Fields">[RFC3864]</cite></a>):
    34283423      </p>
    34293424      <div id="rfc.table.3">
     
    34433438                  <td class="left">http</td>
    34443439                  <td class="left">standard</td>
    3445                   <td class="left"> <a href="#header.accept" id="rfc.xref.header.accept.4" title="Accept">Section&nbsp;11.11</a>
     3440                  <td class="left"> <a href="#header.accept" id="rfc.xref.header.accept.4" title="Accept">Section&nbsp;10.11</a>
    34463441                  </td>
    34473442               </tr>
     
    34503445                  <td class="left">http</td>
    34513446                  <td class="left">standard</td>
    3452                   <td class="left"> <a href="#header.accept-charset" id="rfc.xref.header.accept-charset.3" title="Accept-Charset">Section&nbsp;11.12</a>
     3447                  <td class="left"> <a href="#header.accept-charset" id="rfc.xref.header.accept-charset.3" title="Accept-Charset">Section&nbsp;10.12</a>
    34533448                  </td>
    34543449               </tr>
     
    34573452                  <td class="left">http</td>
    34583453                  <td class="left">standard</td>
    3459                   <td class="left"> <a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.4" title="Accept-Encoding">Section&nbsp;11.13</a>
     3454                  <td class="left"> <a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.4" title="Accept-Encoding">Section&nbsp;10.13</a>
    34603455                  </td>
    34613456               </tr>
     
    34643459                  <td class="left">http</td>
    34653460                  <td class="left">standard</td>
    3466                   <td class="left"> <a href="#header.accept-language" id="rfc.xref.header.accept-language.3" title="Accept-Language">Section&nbsp;11.14</a>
     3461                  <td class="left"> <a href="#header.accept-language" id="rfc.xref.header.accept-language.3" title="Accept-Language">Section&nbsp;10.14</a>
    34673462                  </td>
    34683463               </tr>
     
    34713466                  <td class="left">http</td>
    34723467                  <td class="left">standard</td>
    3473                   <td class="left"> <a href="#header.allow" id="rfc.xref.header.allow.3" title="Allow">Section&nbsp;11.1</a>
     3468                  <td class="left"> <a href="#header.allow" id="rfc.xref.header.allow.3" title="Allow">Section&nbsp;10.1</a>
    34743469                  </td>
    34753470               </tr>
     
    34783473                  <td class="left">http</td>
    34793474                  <td class="left">standard</td>
    3480                   <td class="left"> <a href="#header.content-encoding" id="rfc.xref.header.content-encoding.4" title="Content-Encoding">Section&nbsp;11.15</a>
     3475                  <td class="left"> <a href="#header.content-encoding" id="rfc.xref.header.content-encoding.4" title="Content-Encoding">Section&nbsp;10.15</a>
    34813476                  </td>
    34823477               </tr>
     
    34853480                  <td class="left">http</td>
    34863481                  <td class="left">standard</td>
    3487                   <td class="left"> <a href="#header.content-language" id="rfc.xref.header.content-language.2" title="Content-Language">Section&nbsp;11.16</a>
     3482                  <td class="left"> <a href="#header.content-language" id="rfc.xref.header.content-language.2" title="Content-Language">Section&nbsp;10.16</a>
    34883483                  </td>
    34893484               </tr>
     
    34923487                  <td class="left">http</td>
    34933488                  <td class="left">standard</td>
    3494                   <td class="left"> <a href="#header.content-location" id="rfc.xref.header.content-location.4" title="Content-Location">Section&nbsp;11.17</a>
     3489                  <td class="left"> <a href="#header.content-location" id="rfc.xref.header.content-location.4" title="Content-Location">Section&nbsp;10.17</a>
    34953490                  </td>
    34963491               </tr>
     
    34993494                  <td class="left">http</td>
    35003495                  <td class="left">standard</td>
    3501                   <td class="left"> <a href="#header.content-type" id="rfc.xref.header.content-type.5" title="Content-Type">Section&nbsp;11.18</a>
     3496                  <td class="left"> <a href="#header.content-type" id="rfc.xref.header.content-type.5" title="Content-Type">Section&nbsp;10.18</a>
    35023497                  </td>
    35033498               </tr>
     
    35063501                  <td class="left">http</td>
    35073502                  <td class="left">standard</td>
    3508                   <td class="left"> <a href="#header.date" id="rfc.xref.header.date.2" title="Date">Section&nbsp;11.2</a>
     3503                  <td class="left"> <a href="#header.date" id="rfc.xref.header.date.2" title="Date">Section&nbsp;10.2</a>
    35093504                  </td>
    35103505               </tr>
     
    35133508                  <td class="left">http</td>
    35143509                  <td class="left">standard</td>
    3515                   <td class="left"> <a href="#header.expect" id="rfc.xref.header.expect.3" title="Expect">Section&nbsp;11.3</a>
     3510                  <td class="left"> <a href="#header.expect" id="rfc.xref.header.expect.3" title="Expect">Section&nbsp;10.3</a>
    35163511                  </td>
    35173512               </tr>
     
    35203515                  <td class="left">http</td>
    35213516                  <td class="left">standard</td>
    3522                   <td class="left"> <a href="#header.from" id="rfc.xref.header.from.2" title="From">Section&nbsp;11.4</a>
     3517                  <td class="left"> <a href="#header.from" id="rfc.xref.header.from.2" title="From">Section&nbsp;10.4</a>
    35233518                  </td>
    35243519               </tr>
     
    35273522                  <td class="left">http</td>
    35283523                  <td class="left">standard</td>
    3529                   <td class="left"> <a href="#header.location" id="rfc.xref.header.location.4" title="Location">Section&nbsp;11.5</a>
     3524                  <td class="left"> <a href="#header.location" id="rfc.xref.header.location.4" title="Location">Section&nbsp;10.5</a>
    35303525                  </td>
    35313526               </tr>
     
    35413536                  <td class="left">http</td>
    35423537                  <td class="left">standard</td>
    3543                   <td class="left"> <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.4" title="Max-Forwards">Section&nbsp;11.6</a>
     3538                  <td class="left"> <a href="#header.max-forwards" id="rfc.xref.header.max-forwards.4" title="Max-Forwards">Section&nbsp;10.6</a>
    35443539                  </td>
    35453540               </tr>
     
    35483543                  <td class="left">http</td>
    35493544                  <td class="left">standard</td>
    3550                   <td class="left"> <a href="#header.referer" id="rfc.xref.header.referer.2" title="Referer">Section&nbsp;11.7</a>
     3545                  <td class="left"> <a href="#header.referer" id="rfc.xref.header.referer.2" title="Referer">Section&nbsp;10.7</a>
    35513546                  </td>
    35523547               </tr>
     
    35553550                  <td class="left">http</td>
    35563551                  <td class="left">standard</td>
    3557                   <td class="left"> <a href="#header.retry-after" id="rfc.xref.header.retry-after.3" title="Retry-After">Section&nbsp;11.8</a>
     3552                  <td class="left"> <a href="#header.retry-after" id="rfc.xref.header.retry-after.3" title="Retry-After">Section&nbsp;10.8</a>
    35583553                  </td>
    35593554               </tr>
     
    35623557                  <td class="left">http</td>
    35633558                  <td class="left">standard</td>
    3564                   <td class="left"> <a href="#header.server" id="rfc.xref.header.server.2" title="Server">Section&nbsp;11.9</a>
     3559                  <td class="left"> <a href="#header.server" id="rfc.xref.header.server.2" title="Server">Section&nbsp;10.9</a>
    35653560                  </td>
    35663561               </tr>
     
    35693564                  <td class="left">http</td>
    35703565                  <td class="left">standard</td>
    3571                   <td class="left"> <a href="#header.user-agent" id="rfc.xref.header.user-agent.3" title="User-Agent">Section&nbsp;11.10</a>
     3566                  <td class="left"> <a href="#header.user-agent" id="rfc.xref.header.user-agent.3" title="User-Agent">Section&nbsp;10.10</a>
    35723567                  </td>
    35733568               </tr>
     
    35753570         </table>
    35763571      </div>
    3577       <p id="rfc.section.12.3.p.2">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p>
    3578       <h2 id="rfc.section.12.4"><a href="#rfc.section.12.4">12.4</a>&nbsp;<a id="content.coding.registration" href="#content.coding.registration">Content Coding Registry</a></h2>
    3579       <p id="rfc.section.12.4.p.1">The registration procedure for HTTP Content Codings is now defined by <a href="#content.coding.registry" title="Content Coding Registry">Section&nbsp;7.2.1</a> of this document.
    3580       </p>
    3581       <p id="rfc.section.12.4.p.2">The HTTP Content Codings Registry located at &lt;<a href="http://www.iana.org/assignments/http-parameters">http://www.iana.org/assignments/http-parameters</a>&gt; shall be updated with the registration below:
     3572      <p id="rfc.section.11.3.p.2">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p>
     3573      <h2 id="rfc.section.11.4"><a href="#rfc.section.11.4">11.4</a>&nbsp;<a id="content.coding.registration" href="#content.coding.registration">Content Coding Registry</a></h2>
     3574      <p id="rfc.section.11.4.p.1">The registration procedure for HTTP Content Codings is now defined by <a href="#content.coding.registry" title="Content Coding Registry">Section&nbsp;6.4.1</a> of this document.
     3575      </p>
     3576      <p id="rfc.section.11.4.p.2">The HTTP Content Codings Registry located at &lt;<a href="http://www.iana.org/assignments/http-parameters">http://www.iana.org/assignments/http-parameters</a>&gt; shall be updated with the registration below:
    35823577      </p>
    35833578      <div id="rfc.table.4">
     
    36143609                  <td class="left">identity</td>
    36153610                  <td class="left">reserved (synonym for "no encoding" in Accept-Encoding header field)</td>
    3616                   <td class="left"> <a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.5" title="Accept-Encoding">Section&nbsp;11.13</a>
     3611                  <td class="left"> <a href="#header.accept-encoding" id="rfc.xref.header.accept-encoding.5" title="Accept-Encoding">Section&nbsp;10.13</a>
    36173612                  </td>
    36183613               </tr>
     
    36203615         </table>
    36213616      </div>
    3622       <h1 id="rfc.section.13"><a href="#rfc.section.13">13.</a>&nbsp;<a id="security.considerations" href="#security.considerations">Security Considerations</a></h1>
    3623       <p id="rfc.section.13.p.1">This section is meant to inform application developers, information providers, and users of the security limitations in HTTP/1.1
     3617      <h1 id="rfc.section.12"><a href="#rfc.section.12">12.</a>&nbsp;<a id="security.considerations" href="#security.considerations">Security Considerations</a></h1>
     3618      <p id="rfc.section.12.p.1">This section is meant to inform application developers, information providers, and users of the security limitations in HTTP/1.1
    36243619         as described by this document. The discussion does not include definitive solutions to the problems revealed, though it does
    36253620         make some suggestions for reducing security risks.
    36263621      </p>
    3627       <h2 id="rfc.section.13.1"><a href="#rfc.section.13.1">13.1</a>&nbsp;<a id="security.sensitive" href="#security.sensitive">Transfer of Sensitive Information</a></h2>
    3628       <p id="rfc.section.13.1.p.1">Like any generic data transfer protocol, HTTP cannot regulate the content of the data that is transferred, nor is there any
     3622      <h2 id="rfc.section.12.1"><a href="#rfc.section.12.1">12.1</a>&nbsp;<a id="security.sensitive" href="#security.sensitive">Transfer of Sensitive Information</a></h2>
     3623      <p id="rfc.section.12.1.p.1">Like any generic data transfer protocol, HTTP cannot regulate the content of the data that is transferred, nor is there any
    36293624         a priori method of determining the sensitivity of any particular piece of information within the context of any given request.
    36303625         Therefore, applications <em class="bcp14">SHOULD</em> supply as much control over this information as possible to the provider of that information. Four header fields are worth
    36313626         special mention in this context: Server, Via, Referer and From.
    36323627      </p>
    3633       <p id="rfc.section.13.1.p.2">Revealing the specific software version of the server might allow the server machine to become more vulnerable to attacks
     3628      <p id="rfc.section.12.1.p.2">Revealing the specific software version of the server might allow the server machine to become more vulnerable to attacks
    36343629         against software that is known to contain security holes. Implementors <em class="bcp14">SHOULD</em> make the Server header field a configurable option.
    36353630      </p>
    3636       <p id="rfc.section.13.1.p.3">Proxies which serve as a portal through a network firewall <em class="bcp14">SHOULD</em> take special precautions regarding the transfer of header information that identifies the hosts behind the firewall. In particular,
     3631      <p id="rfc.section.12.1.p.3">Proxies which serve as a portal through a network firewall <em class="bcp14">SHOULD</em> take special precautions regarding the transfer of header information that identifies the hosts behind the firewall. In particular,
    36373632         they <em class="bcp14">SHOULD</em> remove, or replace with sanitized versions, any Via fields generated behind the firewall.
    36383633      </p>
    3639       <p id="rfc.section.13.1.p.4">The Referer header field allows reading patterns to be studied and reverse links drawn. Although it can be very useful, its
     3634      <p id="rfc.section.12.1.p.4">The Referer header field allows reading patterns to be studied and reverse links drawn. Although it can be very useful, its
    36403635         power can be abused if user details are not separated from the information contained in the Referer. Even when the personal
    36413636         information has been removed, the Referer header field might indicate a private document's URI whose publication would be
    36423637         inappropriate.
    36433638      </p>
    3644       <p id="rfc.section.13.1.p.5">The information sent in the From field might conflict with the user's privacy interests or their site's security policy, and
     3639      <p id="rfc.section.12.1.p.5">The information sent in the From field might conflict with the user's privacy interests or their site's security policy, and
    36453640         hence it <em class="bcp14">SHOULD NOT</em> be transmitted without the user being able to disable, enable, and modify the contents of the field. The user <em class="bcp14">MUST</em> be able to set the contents of this field within a user preference or application defaults configuration.
    36463641      </p>
    3647       <p id="rfc.section.13.1.p.6">We suggest, though do not require, that a convenient toggle interface be provided for the user to enable or disable the sending
     3642      <p id="rfc.section.12.1.p.6">We suggest, though do not require, that a convenient toggle interface be provided for the user to enable or disable the sending
    36483643         of From and Referer information.
    36493644      </p>
    3650       <p id="rfc.section.13.1.p.7">The User-Agent (<a href="#header.user-agent" id="rfc.xref.header.user-agent.4" title="User-Agent">Section&nbsp;11.10</a>) or Server (<a href="#header.server" id="rfc.xref.header.server.3" title="Server">Section&nbsp;11.9</a>) header fields can sometimes be used to determine that a specific client or server has a particular security hole which might
     3645      <p id="rfc.section.12.1.p.7">The User-Agent (<a href="#header.user-agent" id="rfc.xref.header.user-agent.4" title="User-Agent">Section&nbsp;10.10</a>) or Server (<a href="#header.server" id="rfc.xref.header.server.3" title="Server">Section&nbsp;10.9</a>) header fields can sometimes be used to determine that a specific client or server has a particular security hole which might
    36513646         be exploited. Unfortunately, this same information is often used for other valuable purposes for which HTTP currently has
    36523647         no better mechanism.
    36533648      </p>
    3654       <p id="rfc.section.13.1.p.8">Furthermore, the User-Agent header field may contain enough entropy to be used, possibly in conjunction with other material,
     3649      <p id="rfc.section.12.1.p.8">Furthermore, the User-Agent header field may contain enough entropy to be used, possibly in conjunction with other material,
    36553650         to uniquely identify the user.
    36563651      </p>
    3657       <p id="rfc.section.13.1.p.9">Some request methods, like TRACE (<a href="#TRACE" id="rfc.xref.TRACE.3" title="TRACE">Section&nbsp;2.3.7</a>), expose information that was sent in request header fields within the body of their response. Clients <em class="bcp14">SHOULD</em> be careful with sensitive information, like Cookies, Authorization credentials, and other header fields that might be used
     3652      <p id="rfc.section.12.1.p.9">Some request methods, like TRACE (<a href="#TRACE" id="rfc.xref.TRACE.3" title="TRACE">Section&nbsp;2.3.7</a>), expose information that was sent in request header fields within the body of their response. Clients <em class="bcp14">SHOULD</em> be careful with sensitive information, like Cookies, Authorization credentials, and other header fields that might be used
    36583653         to collect data from the client.
    36593654      </p>
    3660       <h2 id="rfc.section.13.2"><a href="#rfc.section.13.2">13.2</a>&nbsp;<a id="encoding.sensitive.information.in.uris" href="#encoding.sensitive.information.in.uris">Encoding Sensitive Information in URIs</a></h2>
    3661       <p id="rfc.section.13.2.p.1">Because the source of a link might be private information or might reveal an otherwise private information source, it is strongly
     3655      <h2 id="rfc.section.12.2"><a href="#rfc.section.12.2">12.2</a>&nbsp;<a id="encoding.sensitive.information.in.uris" href="#encoding.sensitive.information.in.uris">Encoding Sensitive Information in URIs</a></h2>
     3656      <p id="rfc.section.12.2.p.1">Because the source of a link might be private information or might reveal an otherwise private information source, it is strongly
    36623657         recommended that the user be able to select whether or not the Referer field is sent. For example, a browser client could
    36633658         have a toggle switch for browsing openly/anonymously, which would respectively enable/disable the sending of Referer and From
    36643659         information.
    36653660      </p>
    3666       <p id="rfc.section.13.2.p.2">Clients <em class="bcp14">SHOULD NOT</em> include a Referer header field in a (non-secure) HTTP request if the referring page was transferred with a secure protocol.
    3667       </p>
    3668       <p id="rfc.section.13.2.p.3">Authors of services <em class="bcp14">SHOULD NOT</em> use GET-based forms for the submission of sensitive data because that data will be placed in the request-target. Many existing
     3661      <p id="rfc.section.12.2.p.2">Clients <em class="bcp14">SHOULD NOT</em> include a Referer header field in a (non-secure) HTTP request if the referring page was transferred with a secure protocol.
     3662      </p>
     3663      <p id="rfc.section.12.2.p.3">Authors of services <em class="bcp14">SHOULD NOT</em> use GET-based forms for the submission of sensitive data because that data will be placed in the request-target. Many existing
    36693664         servers, proxies, and user agents log or display the request-target in places where it might be visible to third parties.
    36703665         Such services can use POST-based form submission instead.
    36713666      </p>
    3672       <h2 id="rfc.section.13.3"><a href="#rfc.section.13.3">13.3</a>&nbsp;<a id="location.spoofing-leakage" href="#location.spoofing-leakage">Location Header Fields: Spoofing and Information Leakage</a></h2>
    3673       <p id="rfc.section.13.3.p.1">If a single server supports multiple organizations that do not trust one another, then it <em class="bcp14">MUST</em> check the values of Location and Content-Location header fields in responses that are generated under control of said organizations
     3667      <h2 id="rfc.section.12.3"><a href="#rfc.section.12.3">12.3</a>&nbsp;<a id="location.spoofing-leakage" href="#location.spoofing-leakage">Location Header Fields: Spoofing and Information Leakage</a></h2>
     3668      <p id="rfc.section.12.3.p.1">If a single server supports multiple organizations that do not trust one another, then it <em class="bcp14">MUST</em> check the values of Location and Content-Location header fields in responses that are generated under control of said organizations
    36743669         to make sure that they do not attempt to invalidate resources over which they have no authority.
    36753670      </p>
    3676       <p id="rfc.section.13.3.p.2">Furthermore, appending the fragment identifier from one URI to another one obtained from a Location header field might leak
     3671      <p id="rfc.section.12.3.p.2">Furthermore, appending the fragment identifier from one URI to another one obtained from a Location header field might leak
    36773672         confidential information to the target server — although the fragment identifier is not transmitted in the final request,
    36783673         it might be visible to the user agent through other means, such as scripting.
    36793674      </p>
    3680       <h2 id="rfc.section.13.4"><a href="#rfc.section.13.4">13.4</a>&nbsp;Security Considerations for CONNECT
     3675      <h2 id="rfc.section.12.4"><a href="#rfc.section.12.4">12.4</a>&nbsp;Security Considerations for CONNECT
    36813676      </h2>
    3682       <p id="rfc.section.13.4.p.1">Since tunneled data is opaque to the proxy, there are additional risks to tunneling to other well-known or reserved ports.
     3677      <p id="rfc.section.12.4.p.1">Since tunneled data is opaque to the proxy, there are additional risks to tunneling to other well-known or reserved ports.
    36833678         A HTTP client CONNECTing to port 25 could relay spam via SMTP, for example. As such, proxies <em class="bcp14">SHOULD</em> restrict CONNECT access to a small number of known ports.
    36843679      </p>
    3685       <h2 id="rfc.section.13.5"><a href="#rfc.section.13.5">13.5</a>&nbsp;<a id="privacy.issues.connected.to.accept.header.fields" href="#privacy.issues.connected.to.accept.header.fields">Privacy Issues Connected to Accept Header Fields</a></h2>
    3686       <p id="rfc.section.13.5.p.1">Accept header fields can reveal information about the user to all servers which are accessed. The Accept-Language header field
     3680      <h2 id="rfc.section.12.5"><a href="#rfc.section.12.5">12.5</a>&nbsp;<a id="privacy.issues.connected.to.accept.header.fields" href="#privacy.issues.connected.to.accept.header.fields">Privacy Issues Connected to Accept Header Fields</a></h2>
     3681      <p id="rfc.section.12.5.p.1">Accept header fields can reveal information about the user to all servers which are accessed. The Accept-Language header field
    36873682         in particular can reveal information the user would consider to be of a private nature, because the understanding of particular
    36883683         languages is often strongly correlated to the membership of a particular ethnic group. User agents which offer the option
     
    36903685         configuration process include a message which makes the user aware of the loss of privacy involved.
    36913686      </p>
    3692       <p id="rfc.section.13.5.p.2">An approach that limits the loss of privacy would be for a user agent to omit the sending of Accept-Language header fields
     3687      <p id="rfc.section.12.5.p.2">An approach that limits the loss of privacy would be for a user agent to omit the sending of Accept-Language header fields
    36933688         by default, and to ask the user whether or not to start sending Accept-Language header fields to a server if it detects, by
    36943689         looking for any Vary header fields generated by the server, that such sending could improve the quality of service.
    36953690      </p>
    3696       <p id="rfc.section.13.5.p.3">Elaborate user-customized accept header fields sent in every request, in particular if these include quality values, can be
     3691      <p id="rfc.section.12.5.p.3">Elaborate user-customized accept header fields sent in every request, in particular if these include quality values, can be
    36973692         used by servers as relatively reliable and long-lived user identifiers. Such user identifiers would allow content providers
    36983693         to do click-trail tracking, and would allow collaborating content providers to match cross-server click-trails or form submissions
     
    37023697         filter the accept header fields in relayed requests. General purpose user agents which provide a high degree of header configurability <em class="bcp14">SHOULD</em> warn users about the loss of privacy which can be involved.
    37033698      </p>
    3704       <h1 id="rfc.section.14"><a href="#rfc.section.14">14.</a>&nbsp;<a id="acks" href="#acks">Acknowledgments</a></h1>
    3705       <p id="rfc.section.14.p.1">See <a href="p1-messaging.html#acks" title="Acknowledgments">Section 9</a> of <a href="#Part1" id="rfc.xref.Part1.53"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>.
    3706       </p>
    3707       <h1 id="rfc.references"><a id="rfc.section.15" href="#rfc.section.15">15.</a> References
     3699      <h1 id="rfc.section.13"><a href="#rfc.section.13">13.</a>&nbsp;<a id="acks" href="#acks">Acknowledgments</a></h1>
     3700      <p id="rfc.section.13.p.1">See <a href="p1-messaging.html#acks" title="Acknowledgments">Section 9</a> of <a href="#Part1" id="rfc.xref.Part1.53"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>.
     3701      </p>
     3702      <h1 id="rfc.references"><a id="rfc.section.14" href="#rfc.section.14">14.</a> References
    37083703      </h1>
    3709       <h2 id="rfc.references.1"><a href="#rfc.section.15.1" id="rfc.section.15.1">15.1</a> Normative References
     3704      <h2 id="rfc.references.1"><a href="#rfc.section.14.1" id="rfc.section.14.1">14.1</a> Normative References
    37103705      </h2>
    37113706      <table>                                 
     
    37963791         </tr>
    37973792      </table>
    3798       <h2 id="rfc.references.2"><a href="#rfc.section.15.2" id="rfc.section.15.2">15.2</a> Informative References
     3793      <h2 id="rfc.references.2"><a href="#rfc.section.14.2" id="rfc.section.14.2">14.2</a> Informative References
    37993794      </h2>
    38003795      <table>                                     
     
    39293924      </p>
    39303925      <h2 id="rfc.section.A.2"><a href="#rfc.section.A.2">A.2</a>&nbsp;<a id="conversion.to.canonical.form" href="#conversion.to.canonical.form">Conversion to Canonical Form</a></h2>
    3931       <p id="rfc.section.A.2.p.1">MIME requires that an Internet mail body-part be converted to canonical form prior to being transferred, as described in <a href="http://tools.ietf.org/html/rfc2049#section-4">Section 4</a> of <a href="#RFC2049" id="rfc.xref.RFC2049.1"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Five: Conformance Criteria and Examples">[RFC2049]</cite></a>. <a href="#canonicalization.and.text.defaults" title="Canonicalization and Text Defaults">Section&nbsp;7.3.1</a> of this document describes the forms allowed for subtypes of the "text" media type when transmitted over HTTP. <a href="#RFC2046" id="rfc.xref.RFC2046.4"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types">[RFC2046]</cite></a> requires that content with a type of "text" represent line breaks as CRLF and forbids the use of CR or LF outside of line
     3926      <p id="rfc.section.A.2.p.1">MIME requires that an Internet mail body-part be converted to canonical form prior to being transferred, as described in <a href="http://tools.ietf.org/html/rfc2049#section-4">Section 4</a> of <a href="#RFC2049" id="rfc.xref.RFC2049.1"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Five: Conformance Criteria and Examples">[RFC2049]</cite></a>. <a href="#canonicalization.and.text.defaults" title="Canonicalization and Text Defaults">Section&nbsp;6.5.1</a> of this document describes the forms allowed for subtypes of the "text" media type when transmitted over HTTP. <a href="#RFC2046" id="rfc.xref.RFC2046.4"><cite title="Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types">[RFC2046]</cite></a> requires that content with a type of "text" represent line breaks as CRLF and forbids the use of CR or LF outside of line
    39323927         break sequences. HTTP allows CRLF, bare CR, and bare LF to indicate a line break within text content when a message is transmitted
    39333928         over HTTP.
    39343929      </p>
    3935       <p id="rfc.section.A.2.p.2">Where it is possible, a proxy or gateway from HTTP to a strict MIME environment <em class="bcp14">SHOULD</em> translate all line breaks within the text media types described in <a href="#canonicalization.and.text.defaults" title="Canonicalization and Text Defaults">Section&nbsp;7.3.1</a> of this document to the RFC 2049 canonical form of CRLF. Note, however, that this might be complicated by the presence of
     3930      <p id="rfc.section.A.2.p.2">Where it is possible, a proxy or gateway from HTTP to a strict MIME environment <em class="bcp14">SHOULD</em> translate all line breaks within the text media types described in <a href="#canonicalization.and.text.defaults" title="Canonicalization and Text Defaults">Section&nbsp;6.5.1</a> of this document to the RFC 2049 canonical form of CRLF. Note, however, that this might be complicated by the presence of
    39363931         a Content-Encoding and by the fact that HTTP allows the use of some character encodings which do not use octets 13 and 10
    39373932         to represent CR and LF, respectively, as is the case for some multi-byte character encodings.
     
    39653960      <p id="rfc.section.A.7.p.1">HTTP implementations which share code with MHTML <a href="#RFC2557" id="rfc.xref.RFC2557.2"><cite title="MIME Encapsulation of Aggregate Documents, such as HTML (MHTML)">[RFC2557]</cite></a> implementations need to be aware of MIME line length limitations. Since HTTP does not have this limitation, HTTP does not
    39663961         fold long lines. MHTML messages being transported by HTTP follow all conventions of MHTML, including line length limitations
    3967          and folding, canonicalization, etc., since HTTP transports all message-bodies as payload (see <a href="#multipart.types" title="Multipart Types">Section&nbsp;7.3.2</a>) and does not interpret the content or any MIME header lines that might be contained therein.
     3962         and folding, canonicalization, etc., since HTTP transports all message-bodies as payload (see <a href="#multipart.types" title="Multipart Types">Section&nbsp;6.5.2</a>) and does not interpret the content or any MIME header lines that might be contained therein.
    39683963      </p>
    39693964      <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a>&nbsp;<a id="additional.features" href="#additional.features">Additional Features</a></h1>
     
    39983993      <p id="rfc.section.C.p.9">Define status 426 (Upgrade Required) (this was incorporated from <a href="#RFC2817" id="rfc.xref.RFC2817.4"><cite title="Upgrading to TLS Within HTTP/1.1">[RFC2817]</cite></a>). (<a href="#status.426" id="rfc.xref.status.426.3" title="426 Upgrade Required">Section&nbsp;4.6.15</a>)
    39993994      </p>
    4000       <p id="rfc.section.C.p.10">Change ABNF productions for header fields to only define the field value. (<a href="#header.field.definitions" title="Header Field Definitions">Section&nbsp;11</a>)
     3995      <p id="rfc.section.C.p.10">Change ABNF productions for header fields to only define the field value. (<a href="#header.field.definitions" title="Header Field Definitions">Section&nbsp;10</a>)
    40013996      </p>
    40023997      <p id="rfc.section.C.p.11">Reclassify "Allow" as response header field, removing the option to specify it in a PUT request. Relax the server requirement
    4003          on the contents of the Allow header field and remove requirement on clients to always trust the header field value. (<a href="#header.allow" id="rfc.xref.header.allow.4" title="Allow">Section&nbsp;11.1</a>)
     3998         on the contents of the Allow header field and remove requirement on clients to always trust the header field value. (<a href="#header.allow" id="rfc.xref.header.allow.4" title="Allow">Section&nbsp;10.1</a>)
    40043999      </p>
    40054000      <p id="rfc.section.C.p.12">The ABNF for the Expect header field has been both fixed (allowing parameters for value-less expectations as well) and simplified
    4006          (allowing trailing semicolons after "100-continue" when they were invalid before). (<a href="#header.expect" id="rfc.xref.header.expect.4" title="Expect">Section&nbsp;11.3</a>)
     4001         (allowing trailing semicolons after "100-continue" when they were invalid before). (<a href="#header.expect" id="rfc.xref.header.expect.4" title="Expect">Section&nbsp;10.3</a>)
    40074002      </p>
    40084003      <p id="rfc.section.C.p.13">Correct syntax of Location header field to allow URI references (including relative references and fragments), as referred
    40094004         symbol "absoluteURI" wasn't what was expected, and add some clarifications as to when use of fragments would not be appropriate.
    4010          (<a href="#header.location" id="rfc.xref.header.location.5" title="Location">Section&nbsp;11.5</a>)
    4011       </p>
    4012       <p id="rfc.section.C.p.14">Restrict Max-Forwards header field to OPTIONS and TRACE (previously, extension methods could have used it as well). (<a href="#header.max-forwards" id="rfc.xref.header.max-forwards.5" title="Max-Forwards">Section&nbsp;11.6</a>)
    4013       </p>
    4014       <p id="rfc.section.C.p.15">Allow Referer field value of "about:blank" as alternative to not specifying it. (<a href="#header.referer" id="rfc.xref.header.referer.3" title="Referer">Section&nbsp;11.7</a>)
     4005         (<a href="#header.location" id="rfc.xref.header.location.5" title="Location">Section&nbsp;10.5</a>)
     4006      </p>
     4007      <p id="rfc.section.C.p.14">Restrict Max-Forwards header field to OPTIONS and TRACE (previously, extension methods could have used it as well). (<a href="#header.max-forwards" id="rfc.xref.header.max-forwards.5" title="Max-Forwards">Section&nbsp;10.6</a>)
     4008      </p>
     4009      <p id="rfc.section.C.p.15">Allow Referer field value of "about:blank" as alternative to not specifying it. (<a href="#header.referer" id="rfc.xref.header.referer.3" title="Referer">Section&nbsp;10.7</a>)
    40154010      </p>
    40164011      <p id="rfc.section.C.p.16">In the description of the Server header field, the Via field was described as a SHOULD. The requirement was and is stated
    4017          correctly in the description of the Via header field in <a href="p1-messaging.html#header.via" title="Via">Section 6.2</a> of <a href="#Part1" id="rfc.xref.Part1.55"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. (<a href="#header.server" id="rfc.xref.header.server.4" title="Server">Section&nbsp;11.9</a>)
    4018       </p>
    4019       <p id="rfc.section.C.p.17">Clarify contexts that charset is used in. (<a href="#character.sets" title="Character Encodings (charset)">Section&nbsp;7.1</a>)
    4020       </p>
    4021       <p id="rfc.section.C.p.18">Registration of Content Codings now requires IETF Review (<a href="#content.coding.registry" title="Content Coding Registry">Section&nbsp;7.2.1</a>)
    4022       </p>
    4023       <p id="rfc.section.C.p.19">Remove the default character encoding for text media types; the default now is whatever the media type definition says. (<a href="#canonicalization.and.text.defaults" title="Canonicalization and Text Defaults">Section&nbsp;7.3.1</a>)
    4024       </p>
    4025       <p id="rfc.section.C.p.20">Change ABNF productions for header fields to only define the field value. (<a href="#header.field.definitions" title="Header Field Definitions">Section&nbsp;11</a>)
     4012         correctly in the description of the Via header field in <a href="p1-messaging.html#header.via" title="Via">Section 6.2</a> of <a href="#Part1" id="rfc.xref.Part1.55"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>. (<a href="#header.server" id="rfc.xref.header.server.4" title="Server">Section&nbsp;10.9</a>)
     4013      </p>
     4014      <p id="rfc.section.C.p.17">Clarify contexts that charset is used in. (<a href="#character.sets" title="Character Encodings (charset)">Section&nbsp;6.3</a>)
     4015      </p>
     4016      <p id="rfc.section.C.p.18">Registration of Content Codings now requires IETF Review (<a href="#content.coding.registry" title="Content Coding Registry">Section&nbsp;6.4.1</a>)
     4017      </p>
     4018      <p id="rfc.section.C.p.19">Remove the default character encoding for text media types; the default now is whatever the media type definition says. (<a href="#canonicalization.and.text.defaults" title="Canonicalization and Text Defaults">Section&nbsp;6.5.1</a>)
     4019      </p>
     4020      <p id="rfc.section.C.p.20">Change ABNF productions for header fields to only define the field value. (<a href="#header.field.definitions" title="Header Field Definitions">Section&nbsp;10</a>)
    40264021      </p>
    40274022      <p id="rfc.section.C.p.21">Remove definition of Content-MD5 header field because it was inconsistently implemented with respect to partial responses,
    4028          and also because of known deficiencies in the hash algorithm itself (see <a href="#RFC6151" id="rfc.xref.RFC6151.1"><cite title="Updated Security Considerations for the MD5 Message-Digest and the HMAC-MD5 Algorithms">[RFC6151]</cite></a> for details). (<a href="#header.field.definitions" title="Header Field Definitions">Section&nbsp;11</a>)
    4029       </p>
    4030       <p id="rfc.section.C.p.22">Remove ISO-8859-1 special-casing in Accept-Charset. (<a href="#header.accept-charset" id="rfc.xref.header.accept-charset.4" title="Accept-Charset">Section&nbsp;11.12</a>)
     4023         and also because of known deficiencies in the hash algorithm itself (see <a href="#RFC6151" id="rfc.xref.RFC6151.1"><cite title="Updated Security Considerations for the MD5 Message-Digest and the HMAC-MD5 Algorithms">[RFC6151]</cite></a> for details). (<a href="#header.field.definitions" title="Header Field Definitions">Section&nbsp;10</a>)
     4024      </p>
     4025      <p id="rfc.section.C.p.22">Remove ISO-8859-1 special-casing in Accept-Charset. (<a href="#header.accept-charset" id="rfc.xref.header.accept-charset.4" title="Accept-Charset">Section&nbsp;10.12</a>)
    40314026      </p>
    40324027      <p id="rfc.section.C.p.23">Remove base URI setting semantics for Content-Location due to poor implementation support, which was caused by too many broken
    40334028         servers emitting bogus Content-Location header fields, and also the potentially undesirable effect of potentially breaking
    4034          relative links in content-negotiated resources. (<a href="#header.content-location" id="rfc.xref.header.content-location.5" title="Content-Location">Section&nbsp;11.17</a>)
     4029         relative links in content-negotiated resources. (<a href="#header.content-location" id="rfc.xref.header.content-location.5" title="Content-Location">Section&nbsp;10.17</a>)
    40354030      </p>
    40364031      <p id="rfc.section.C.p.24">Remove reference to non-existant identity transfer-coding value tokens. (<a href="#no.content-transfer-encoding" id="rfc.xref.no.content-transfer-encoding.1" title="No Content-Transfer-Encoding">Appendix&nbsp;A.5</a>)
     
    47784773         <ul class="ind">
    47794774            <li><a id="rfc.index.1" href="#rfc.index.1"><b>1</b></a><ul>
    4780                   <li>100 Continue (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">4.1</a>, <a href="#rfc.iref.24"><b>4.3.1</b></a>, <a href="#rfc.xref.status.100.2">12.2</a></li>
    4781                   <li>100-continue (expect value)&nbsp;&nbsp;<a href="#rfc.iref.108"><b>11.3</b></a></li>
    4782                   <li>101 Switching Protocols (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">4.1</a>, <a href="#rfc.iref.25"><b>4.3.2</b></a>, <a href="#rfc.xref.status.101.2">12.2</a></li>
     4775                  <li>100 Continue (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">4.1</a>, <a href="#rfc.iref.24"><b>4.3.1</b></a>, <a href="#rfc.xref.status.100.2">11.2</a></li>
     4776                  <li>100-continue (expect value)&nbsp;&nbsp;<a href="#rfc.iref.108"><b>10.3</b></a></li>
     4777                  <li>101 Switching Protocols (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">4.1</a>, <a href="#rfc.iref.25"><b>4.3.2</b></a>, <a href="#rfc.xref.status.101.2">11.2</a></li>
    47834778               </ul>
    47844779            </li>
    47854780            <li><a id="rfc.index.2" href="#rfc.index.2"><b>2</b></a><ul>
    4786                   <li>200 OK (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">4.1</a>, <a href="#rfc.iref.26"><b>4.4.1</b></a>, <a href="#rfc.xref.status.200.2">12.2</a></li>
    4787                   <li>201 Created (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">4.1</a>, <a href="#rfc.iref.27"><b>4.4.2</b></a>, <a href="#rfc.xref.status.201.2">12.2</a></li>
    4788                   <li>202 Accepted (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">4.1</a>, <a href="#rfc.iref.28"><b>4.4.3</b></a>, <a href="#rfc.xref.status.202.2">12.2</a></li>
    4789                   <li>203 Non-Authoritative Information (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">4.1</a>, <a href="#rfc.iref.29"><b>4.4.4</b></a>, <a href="#rfc.xref.status.203.2">12.2</a>, <a href="#rfc.xref.status.203.3">C</a></li>
    4790                   <li>204 No Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">4.1</a>, <a href="#rfc.iref.30"><b>4.4.5</b></a>, <a href="#rfc.xref.status.204.2">12.2</a></li>
    4791                   <li>205 Reset Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">4.1</a>, <a href="#rfc.iref.31"><b>4.4.6</b></a>, <a href="#rfc.xref.status.205.2">12.2</a></li>
     4781                  <li>200 OK (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">4.1</a>, <a href="#rfc.iref.26"><b>4.4.1</b></a>, <a href="#rfc.xref.status.200.2">11.2</a></li>
     4782                  <li>201 Created (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">4.1</a>, <a href="#rfc.iref.27"><b>4.4.2</b></a>, <a href="#rfc.xref.status.201.2">11.2</a></li>
     4783                  <li>202 Accepted (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">4.1</a>, <a href="#rfc.iref.28"><b>4.4.3</b></a>, <a href="#rfc.xref.status.202.2">11.2</a></li>
     4784                  <li>203 Non-Authoritative Information (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">4.1</a>, <a href="#rfc.iref.29"><b>4.4.4</b></a>, <a href="#rfc.xref.status.203.2">11.2</a>, <a href="#rfc.xref.status.203.3">C</a></li>
     4785                  <li>204 No Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">4.1</a>, <a href="#rfc.iref.30"><b>4.4.5</b></a>, <a href="#rfc.xref.status.204.2">11.2</a></li>
     4786                  <li>205 Reset Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">4.1</a>, <a href="#rfc.iref.31"><b>4.4.6</b></a>, <a href="#rfc.xref.status.205.2">11.2</a></li>
    47924787               </ul>
    47934788            </li>
    47944789            <li><a id="rfc.index.3" href="#rfc.index.3"><b>3</b></a><ul>
    4795                   <li>300 Multiple Choices (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">4.1</a>, <a href="#rfc.iref.32"><b>4.5.1</b></a>, <a href="#rfc.xref.status.300.2">12.2</a></li>
    4796                   <li>301 Moved Permanently (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">4.1</a>, <a href="#rfc.iref.33"><b>4.5.2</b></a>, <a href="#rfc.xref.status.301.2">12.2</a>, <a href="#rfc.xref.status.301.3">C</a></li>
    4797                   <li>302 Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">4.1</a>, <a href="#rfc.iref.34"><b>4.5.3</b></a>, <a href="#rfc.xref.status.302.2">12.2</a>, <a href="#rfc.xref.status.302.3">C</a></li>
    4798                   <li>303 See Other (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">4.1</a>, <a href="#rfc.iref.35"><b>4.5.4</b></a>, <a href="#rfc.xref.status.303.2">12.2</a></li>
    4799                   <li>305 Use Proxy (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">4.1</a>, <a href="#rfc.iref.36"><b>4.5.5</b></a>, <a href="#rfc.xref.status.305.2">12.2</a>, <a href="#rfc.xref.status.305.3">C</a></li>
    4800                   <li>306 (Unused) (status code)&nbsp;&nbsp;<a href="#rfc.iref.37"><b>4.5.6</b></a>, <a href="#rfc.xref.status.306.1">12.2</a></li>
    4801                   <li>307 Temporary Redirect (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">4.1</a>, <a href="#rfc.iref.38"><b>4.5.7</b></a>, <a href="#rfc.xref.status.307.2">12.2</a>, <a href="#rfc.xref.status.307.3">C</a></li>
     4790                  <li>300 Multiple Choices (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">4.1</a>, <a href="#rfc.iref.32"><b>4.5.1</b></a>, <a href="#rfc.xref.status.300.2">11.2</a></li>
     4791                  <li>301 Moved Permanently (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">4.1</a>, <a href="#rfc.iref.33"><b>4.5.2</b></a>, <a href="#rfc.xref.status.301.2">11.2</a>, <a href="#rfc.xref.status.301.3">C</a></li>
     4792                  <li>302 Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">4.1</a>, <a href="#rfc.iref.34"><b>4.5.3</b></a>, <a href="#rfc.xref.status.302.2">11.2</a>, <a href="#rfc.xref.status.302.3">C</a></li>
     4793                  <li>303 See Other (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">4.1</a>, <a href="#rfc.iref.35"><b>4.5.4</b></a>, <a href="#rfc.xref.status.303.2">11.2</a></li>
     4794                  <li>305 Use Proxy (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">4.1</a>, <a href="#rfc.iref.36"><b>4.5.5</b></a>, <a href="#rfc.xref.status.305.2">11.2</a>, <a href="#rfc.xref.status.305.3">C</a></li>
     4795                  <li>306 (Unused) (status code)&nbsp;&nbsp;<a href="#rfc.iref.37"><b>4.5.6</b></a>, <a href="#rfc.xref.status.306.1">11.2</a></li>
     4796                  <li>307 Temporary Redirect (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">4.1</a>, <a href="#rfc.iref.38"><b>4.5.7</b></a>, <a href="#rfc.xref.status.307.2">11.2</a>, <a href="#rfc.xref.status.307.3">C</a></li>
    48024797               </ul>
    48034798            </li>
    48044799            <li><a id="rfc.index.4" href="#rfc.index.4"><b>4</b></a><ul>
    4805                   <li>400 Bad Request (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">4.1</a>, <a href="#rfc.iref.39"><b>4.6.1</b></a>, <a href="#rfc.xref.status.400.2">12.2</a></li>
    4806                   <li>402 Payment Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">4.1</a>, <a href="#rfc.iref.40"><b>4.6.2</b></a>, <a href="#rfc.xref.status.402.2">12.2</a></li>
    4807                   <li>403 Forbidden (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">4.1</a>, <a href="#rfc.iref.41"><b>4.6.3</b></a>, <a href="#rfc.xref.status.403.2">12.2</a></li>
    4808                   <li>404 Not Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">4.1</a>, <a href="#rfc.iref.42"><b>4.6.4</b></a>, <a href="#rfc.xref.status.404.2">12.2</a></li>
    4809                   <li>405 Method Not Allowed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">4.1</a>, <a href="#rfc.iref.43"><b>4.6.5</b></a>, <a href="#rfc.xref.status.405.2">12.2</a></li>
    4810                   <li>406 Not Acceptable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">4.1</a>, <a href="#rfc.iref.44"><b>4.6.6</b></a>, <a href="#rfc.xref.status.406.2">12.2</a></li>
    4811                   <li>408 Request Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">4.1</a>, <a href="#rfc.iref.45"><b>4.6.7</b></a>, <a href="#rfc.xref.status.408.2">12.2</a></li>
    4812                   <li>409 Conflict (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">4.1</a>, <a href="#rfc.iref.46"><b>4.6.8</b></a>, <a href="#rfc.xref.status.409.2">12.2</a></li>
    4813                   <li>410 Gone (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">4.1</a>, <a href="#rfc.iref.47"><b>4.6.9</b></a>, <a href="#rfc.xref.status.410.2">12.2</a></li>
    4814                   <li>411 Length Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">4.1</a>, <a href="#rfc.iref.48"><b>4.6.10</b></a>, <a href="#rfc.xref.status.411.2">12.2</a></li>
    4815                   <li>413 Request Representation Too Large (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">4.1</a>, <a href="#rfc.iref.49"><b>4.6.11</b></a>, <a href="#rfc.xref.status.413.2">12.2</a></li>
    4816                   <li>414 URI Too Long (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">4.1</a>, <a href="#rfc.iref.50"><b>4.6.12</b></a>, <a href="#rfc.xref.status.414.2">12.2</a></li>
    4817                   <li>415 Unsupported Media Type (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">4.1</a>, <a href="#rfc.iref.51"><b>4.6.13</b></a>, <a href="#rfc.xref.status.415.2">12.2</a></li>
    4818                   <li>417 Expectation Failed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">4.1</a>, <a href="#rfc.iref.52"><b>4.6.14</b></a>, <a href="#rfc.xref.status.417.2">12.2</a></li>
    4819                   <li>426 Upgrade Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">4.1</a>, <a href="#rfc.iref.53"><b>4.6.15</b></a>, <a href="#rfc.xref.status.426.2">12.2</a>, <a href="#rfc.xref.status.426.3">C</a></li>
     4800                  <li>400 Bad Request (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">4.1</a>, <a href="#rfc.iref.39"><b>4.6.1</b></a>, <a href="#rfc.xref.status.400.2">11.2</a></li>
     4801                  <li>402 Payment Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">4.1</a>, <a href="#rfc.iref.40"><b>4.6.2</b></a>, <a href="#rfc.xref.status.402.2">11.2</a></li>
     4802                  <li>403 Forbidden (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">4.1</a>, <a href="#rfc.iref.41"><b>4.6.3</b></a>, <a href="#rfc.xref.status.403.2">11.2</a></li>
     4803                  <li>404 Not Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">4.1</a>, <a href="#rfc.iref.42"><b>4.6.4</b></a>, <a href="#rfc.xref.status.404.2">11.2</a></li>
     4804                  <li>405 Method Not Allowed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">4.1</a>, <a href="#rfc.iref.43"><b>4.6.5</b></a>, <a href="#rfc.xref.status.405.2">11.2</a></li>
     4805                  <li>406 Not Acceptable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">4.1</a>, <a href="#rfc.iref.44"><b>4.6.6</b></a>, <a href="#rfc.xref.status.406.2">11.2</a></li>
     4806                  <li>408 Request Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">4.1</a>, <a href="#rfc.iref.45"><b>4.6.7</b></a>, <a href="#rfc.xref.status.408.2">11.2</a></li>
     4807                  <li>409 Conflict (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">4.1</a>, <a href="#rfc.iref.46"><b>4.6.8</b></a>, <a href="#rfc.xref.status.409.2">11.2</a></li>
     4808                  <li>410 Gone (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">4.1</a>, <a href="#rfc.iref.47"><b>4.6.9</b></a>, <a href="#rfc.xref.status.410.2">11.2</a></li>
     4809                  <li>411 Length Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">4.1</a>, <a href="#rfc.iref.48"><b>4.6.10</b></a>, <a href="#rfc.xref.status.411.2">11.2</a></li>
     4810                  <li>413 Request Representation Too Large (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">4.1</a>, <a href="#rfc.iref.49"><b>4.6.11</b></a>, <a href="#rfc.xref.status.413.2">11.2</a></li>
     4811                  <li>414 URI Too Long (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">4.1</a>, <a href="#rfc.iref.50"><b>4.6.12</b></a>, <a href="#rfc.xref.status.414.2">11.2</a></li>
     4812                  <li>415 Unsupported Media Type (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">4.1</a>, <a href="#rfc.iref.51"><b>4.6.13</b></a>, <a href="#rfc.xref.status.415.2">11.2</a></li>
     4813                  <li>417 Expectation Failed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">4.1</a>, <a href="#rfc.iref.52"><b>4.6.14</b></a>, <a href="#rfc.xref.status.417.2">11.2</a></li>
     4814                  <li>426 Upgrade Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">4.1</a>, <a href="#rfc.iref.53"><b>4.6.15</b></a>, <a href="#rfc.xref.status.426.2">11.2</a>, <a href="#rfc.xref.status.426.3">C</a></li>
    48204815               </ul>
    48214816            </li>
    48224817            <li><a id="rfc.index.5" href="#rfc.index.5"><b>5</b></a><ul>
    4823                   <li>500 Internal Server Error (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">4.1</a>, <a href="#rfc.iref.54"><b>4.7.1</b></a>, <a href="#rfc.xref.status.500.2">12.2</a></li>
    4824                   <li>501 Not Implemented (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">4.1</a>, <a href="#rfc.iref.55"><b>4.7.2</b></a>, <a href="#rfc.xref.status.501.2">12.2</a></li>
    4825                   <li>502 Bad Gateway (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">4.1</a>, <a href="#rfc.iref.56"><b>4.7.3</b></a>, <a href="#rfc.xref.status.502.2">12.2</a></li>
    4826                   <li>503 Service Unavailable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">4.1</a>, <a href="#rfc.iref.57"><b>4.7.4</b></a>, <a href="#rfc.xref.status.503.2">12.2</a></li>
    4827                   <li>504 Gateway Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">4.1</a>, <a href="#rfc.iref.58"><b>4.7.5</b></a>, <a href="#rfc.xref.status.504.2">12.2</a></li>
    4828                   <li>505 HTTP Version Not Supported (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">4.1</a>, <a href="#rfc.iref.59"><b>4.7.6</b></a>, <a href="#rfc.xref.status.505.2">12.2</a></li>
     4818                  <li>500 Internal Server Error (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">4.1</a>, <a href="#rfc.iref.54"><b>4.7.1</b></a>, <a href="#rfc.xref.status.500.2">11.2</a></li>
     4819                  <li>501 Not Implemented (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">4.1</a>, <a href="#rfc.iref.55"><b>4.7.2</b></a>, <a href="#rfc.xref.status.501.2">11.2</a></li>
     4820                  <li>502 Bad Gateway (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">4.1</a>, <a href="#rfc.iref.56"><b>4.7.3</b></a>, <a href="#rfc.xref.status.502.2">11.2</a></li>
     4821                  <li>503 Service Unavailable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">4.1</a>, <a href="#rfc.iref.57"><b>4.7.4</b></a>, <a href="#rfc.xref.status.503.2">11.2</a></li>
     4822                  <li>504 Gateway Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">4.1</a>, <a href="#rfc.iref.58"><b>4.7.5</b></a>, <a href="#rfc.xref.status.504.2">11.2</a></li>
     4823                  <li>505 HTTP Version Not Supported (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">4.1</a>, <a href="#rfc.iref.59"><b>4.7.6</b></a>, <a href="#rfc.xref.status.505.2">11.2</a></li>
    48294824               </ul>
    48304825            </li>
    48314826            <li><a id="rfc.index.A" href="#rfc.index.A"><b>A</b></a><ul>
    4832                   <li>Accept header field&nbsp;&nbsp;<a href="#rfc.xref.header.accept.1">3.2</a>, <a href="#rfc.xref.header.accept.2">7.3</a>, <a href="#rfc.xref.header.accept.3">10.1</a>, <a href="#rfc.iref.a.2"><b>11.11</b></a>, <a href="#rfc.xref.header.accept.4">12.3</a></li>
    4833                   <li>Accept-Charset header field&nbsp;&nbsp;<a href="#rfc.xref.header.accept-charset.1">3.2</a>, <a href="#rfc.xref.header.accept-charset.2">10.1</a>, <a href="#rfc.iref.a.3"><b>11.12</b></a>, <a href="#rfc.xref.header.accept-charset.3">12.3</a>, <a href="#rfc.xref.header.accept-charset.4">C</a></li>
    4834                   <li>Accept-Encoding header field&nbsp;&nbsp;<a href="#rfc.xref.header.accept-encoding.1">3.2</a>, <a href="#rfc.xref.header.accept-encoding.2">7.2</a>, <a href="#rfc.xref.header.accept-encoding.3">10.1</a>, <a href="#rfc.iref.a.4"><b>11.13</b></a>, <a href="#rfc.xref.header.accept-encoding.4">12.3</a>, <a href="#rfc.xref.header.accept-encoding.5">12.4</a></li>
    4835                   <li>Accept-Language header field&nbsp;&nbsp;<a href="#rfc.xref.header.accept-language.1">3.2</a>, <a href="#rfc.xref.header.accept-language.2">10.1</a>, <a href="#rfc.iref.a.5"><b>11.14</b></a>, <a href="#rfc.xref.header.accept-language.3">12.3</a></li>
    4836                   <li>Allow header field&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">2</a>, <a href="#rfc.xref.header.allow.2">3.3</a>, <a href="#rfc.iref.a.1"><b>11.1</b></a>, <a href="#rfc.xref.header.allow.3">12.3</a>, <a href="#rfc.xref.header.allow.4">C</a></li>
     4827                  <li>Accept header field&nbsp;&nbsp;<a href="#rfc.xref.header.accept.1">3.2</a>, <a href="#rfc.xref.header.accept.2">6.5</a>, <a href="#rfc.xref.header.accept.3">9.1</a>, <a href="#rfc.iref.a.2"><b>10.11</b></a>, <a href="#rfc.xref.header.accept.4">11.3</a></li>
     4828                  <li>Accept-Charset header field&nbsp;&nbsp;<a href="#rfc.xref.header.accept-charset.1">3.2</a>, <a href="#rfc.xref.header.accept-charset.2">9.1</a>, <a href="#rfc.iref.a.3"><b>10.12</b></a>, <a href="#rfc.xref.header.accept-charset.3">11.3</a>, <a href="#rfc.xref.header.accept-charset.4">C</a></li>
     4829                  <li>Accept-Encoding header field&nbsp;&nbsp;<a href="#rfc.xref.header.accept-encoding.1">3.2</a>, <a href="#rfc.xref.header.accept-encoding.2">6.4</a>, <a href="#rfc.xref.header.accept-encoding.3">9.1</a>, <a href="#rfc.iref.a.4"><b>10.13</b></a>, <a href="#rfc.xref.header.accept-encoding.4">11.3</a>, <a href="#rfc.xref.header.accept-encoding.5">11.4</a></li>
     4830                  <li>Accept-Language header field&nbsp;&nbsp;<a href="#rfc.xref.header.accept-language.1">3.2</a>, <a href="#rfc.xref.header.accept-language.2">9.1</a>, <a href="#rfc.iref.a.5"><b>10.14</b></a>, <a href="#rfc.xref.header.accept-language.3">11.3</a></li>
     4831                  <li>Allow header field&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">2</a>, <a href="#rfc.xref.header.allow.2">3.3</a>, <a href="#rfc.iref.a.1"><b>10.1</b></a>, <a href="#rfc.xref.header.allow.3">11.3</a>, <a href="#rfc.xref.header.allow.4">C</a></li>
    48374832               </ul>
    48384833            </li>
     
    48404835                  <li>Coding Format&nbsp;&nbsp;
    48414836                     <ul>
    4842                         <li>compress&nbsp;&nbsp;<a href="#rfc.iref.c.4">7.2</a></li>
    4843                         <li>deflate&nbsp;&nbsp;<a href="#rfc.iref.c.5">7.2</a></li>
    4844                         <li>gzip&nbsp;&nbsp;<a href="#rfc.iref.c.6">7.2</a></li>
     4837                        <li>compress&nbsp;&nbsp;<a href="#rfc.iref.c.4">6.4</a></li>
     4838                        <li>deflate&nbsp;&nbsp;<a href="#rfc.iref.c.5">6.4</a></li>
     4839                        <li>gzip&nbsp;&nbsp;<a href="#rfc.iref.c.6">6.4</a></li>
    48454840                     </ul>
    48464841                  </li>
    4847                   <li>compress (Coding Format)&nbsp;&nbsp;<a href="#rfc.iref.c.3">7.2</a></li>
    4848                   <li>CONNECT method&nbsp;&nbsp;<a href="#rfc.iref.c.2"><b>2.3.8</b></a>, <a href="#rfc.xref.CONNECT.1">12.1</a>, <a href="#rfc.xref.CONNECT.2">C</a></li>
     4842                  <li>compress (Coding Format)&nbsp;&nbsp;<a href="#rfc.iref.c.3">6.4</a></li>
     4843                  <li>CONNECT method&nbsp;&nbsp;<a href="#rfc.iref.c.2"><b>2.3.8</b></a>, <a href="#rfc.xref.CONNECT.1">11.1</a>, <a href="#rfc.xref.CONNECT.2">C</a></li>
    48494844                  <li>content negotiation&nbsp;&nbsp;<a href="#rfc.iref.c.1">1.1</a></li>
    4850                   <li>Content-Encoding header field&nbsp;&nbsp;<a href="#rfc.xref.header.content-encoding.1">7.2</a>, <a href="#rfc.xref.header.content-encoding.2">9.1</a>, <a href="#rfc.iref.c.7"><b>11.15</b></a>, <a href="#rfc.xref.header.content-encoding.3">11.15</a>, <a href="#rfc.xref.header.content-encoding.4">12.3</a></li>
    4851                   <li>Content-Language header field&nbsp;&nbsp;<a href="#rfc.xref.header.content-language.1">9.1</a>, <a href="#rfc.iref.c.8"><b>11.16</b></a>, <a href="#rfc.xref.header.content-language.2">12.3</a></li>
    4852                   <li>Content-Location header field&nbsp;&nbsp;<a href="#rfc.xref.header.content-location.1">2.3.4</a>, <a href="#rfc.xref.header.content-location.2">9.1</a>, <a href="#rfc.xref.header.content-location.3">11.5</a>, <a href="#rfc.iref.c.9"><b>11.17</b></a>, <a href="#rfc.xref.header.content-location.4">12.3</a>, <a href="#rfc.xref.header.content-location.5">C</a></li>
     4845                  <li>Content-Encoding header field&nbsp;&nbsp;<a href="#rfc.xref.header.content-encoding.1">6.4</a>, <a href="#rfc.xref.header.content-encoding.2">8.1</a>, <a href="#rfc.iref.c.7"><b>10.15</b></a>, <a href="#rfc.xref.header.content-encoding.3">10.15</a>, <a href="#rfc.xref.header.content-encoding.4">11.3</a></li>
     4846                  <li>Content-Language header field&nbsp;&nbsp;<a href="#rfc.xref.header.content-language.1">8.1</a>, <a href="#rfc.iref.c.8"><b>10.16</b></a>, <a href="#rfc.xref.header.content-language.2">11.3</a></li>
     4847                  <li>Content-Location header field&nbsp;&nbsp;<a href="#rfc.xref.header.content-location.1">2.3.4</a>, <a href="#rfc.xref.header.content-location.2">8.1</a>, <a href="#rfc.xref.header.content-location.3">10.5</a>, <a href="#rfc.iref.c.9"><b>10.17</b></a>, <a href="#rfc.xref.header.content-location.4">11.3</a>, <a href="#rfc.xref.header.content-location.5">C</a></li>
    48534848                  <li>Content-Transfer-Encoding header field&nbsp;&nbsp;<a href="#rfc.iref.c.11">A.5</a>, <a href="#rfc.xref.no.content-transfer-encoding.1">C</a></li>
    4854                   <li>Content-Type header field&nbsp;&nbsp;<a href="#rfc.xref.header.content-type.1">3.1</a>, <a href="#rfc.xref.header.content-type.2">4</a>, <a href="#rfc.xref.header.content-type.3">7.3</a>, <a href="#rfc.xref.header.content-type.4">9.1</a>, <a href="#rfc.iref.c.10"><b>11.18</b></a>, <a href="#rfc.xref.header.content-type.5">12.3</a></li>
     4849                  <li>Content-Type header field&nbsp;&nbsp;<a href="#rfc.xref.header.content-type.1">3.1</a>, <a href="#rfc.xref.header.content-type.2">4</a>, <a href="#rfc.xref.header.content-type.3">6.5</a>, <a href="#rfc.xref.header.content-type.4">8.1</a>, <a href="#rfc.iref.c.10"><b>10.18</b></a>, <a href="#rfc.xref.header.content-type.5">11.3</a></li>
    48554850               </ul>
    48564851            </li>
    48574852            <li><a id="rfc.index.D" href="#rfc.index.D"><b>D</b></a><ul>
    4858                   <li>Date header field&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3.3</a>, <a href="#rfc.iref.d.3"><b>11.2</b></a>, <a href="#rfc.xref.header.date.2">12.3</a></li>
    4859                   <li>deflate (Coding Format)&nbsp;&nbsp;<a href="#rfc.iref.d.2">7.2</a></li>
    4860                   <li>DELETE method&nbsp;&nbsp;<a href="#rfc.iref.d.1"><b>2.3.6</b></a>, <a href="#rfc.xref.DELETE.1">12.1</a></li>
    4861                   <li><em>draft-reschke-http-status-308</em>&nbsp;&nbsp;<a href="#rfc.xref.draft-reschke-http-status-308.1">4.5.7</a>, <a href="#draft-reschke-http-status-308"><b>15.2</b></a></li>
     4853                  <li>Date header field&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3.3</a>, <a href="#rfc.iref.d.3"><b>10.2</b></a>, <a href="#rfc.xref.header.date.2">11.3</a></li>
     4854                  <li>deflate (Coding Format)&nbsp;&nbsp;<a href="#rfc.iref.d.2">6.4</a></li>
     4855                  <li>DELETE method&nbsp;&nbsp;<a href="#rfc.iref.d.1"><b>2.3.6</b></a>, <a href="#rfc.xref.DELETE.1">11.1</a></li>
     4856                  <li><em>draft-reschke-http-status-308</em>&nbsp;&nbsp;<a href="#rfc.xref.draft-reschke-http-status-308.1">4.5.7</a>, <a href="#draft-reschke-http-status-308"><b>14.2</b></a></li>
    48624857               </ul>
    48634858            </li>
    48644859            <li><a id="rfc.index.E" href="#rfc.index.E"><b>E</b></a><ul>
    4865                   <li>Expect header field&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">3.2</a>, <a href="#rfc.xref.header.expect.2">4.6.14</a>, <a href="#rfc.iref.e.1"><b>11.3</b></a>, <a href="#rfc.xref.header.expect.3">12.3</a>, <a href="#rfc.xref.header.expect.4">C</a></li>
     4860                  <li>Expect header field&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">3.2</a>, <a href="#rfc.xref.header.expect.2">4.6.14</a>, <a href="#rfc.iref.e.1"><b>10.3</b></a>, <a href="#rfc.xref.header.expect.3">11.3</a>, <a href="#rfc.xref.header.expect.4">C</a></li>
    48664861                  <li>Expect Values&nbsp;&nbsp;
    48674862                     <ul>
    4868                         <li>100-continue&nbsp;&nbsp;<a href="#rfc.iref.e.2"><b>11.3</b></a></li>
     4863                        <li>100-continue&nbsp;&nbsp;<a href="#rfc.iref.e.2"><b>10.3</b></a></li>
    48694864                     </ul>
    48704865                  </li>
     
    48724867            </li>
    48734868            <li><a id="rfc.index.F" href="#rfc.index.F"><b>F</b></a><ul>
    4874                   <li>From header field&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">3.2</a>, <a href="#rfc.iref.f.1"><b>11.4</b></a>, <a href="#rfc.xref.header.from.2">12.3</a></li>
     4869                  <li>From header field&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">3.2</a>, <a href="#rfc.iref.f.1"><b>10.4</b></a>, <a href="#rfc.xref.header.from.2">11.3</a></li>
    48754870               </ul>
    48764871            </li>
    48774872            <li><a id="rfc.index.G" href="#rfc.index.G"><b>G</b></a><ul>
    4878                   <li>GET method&nbsp;&nbsp;<a href="#rfc.iref.g.2"><b>2.3.2</b></a>, <a href="#rfc.xref.GET.1">12.1</a></li>
     4873                  <li>GET method&nbsp;&nbsp;<a href="#rfc.iref.g.2"><b>2.3.2</b></a>, <a href="#rfc.xref.GET.1">11.1</a></li>
    48794874                  <li><tt>Grammar</tt>&nbsp;&nbsp;
    48804875                     <ul>
    4881                         <li><tt>Accept</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.49"><b>11.11</b></a></li>
    4882                         <li><tt>Accept-Charset</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.53"><b>11.12</b></a></li>
    4883                         <li><tt>Accept-Encoding</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.54"><b>11.13</b></a></li>
    4884                         <li><tt>accept-ext</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.52"><b>11.11</b></a></li>
    4885                         <li><tt>Accept-Language</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.56"><b>11.14</b></a></li>
    4886                         <li><tt>accept-params</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.51"><b>11.11</b></a></li>
    4887                         <li><tt>Allow</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.34"><b>11.1</b></a></li>
     4876                        <li><tt>Accept</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.49"><b>10.11</b></a></li>
     4877                        <li><tt>Accept-Charset</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.53"><b>10.12</b></a></li>
     4878                        <li><tt>Accept-Encoding</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.54"><b>10.13</b></a></li>
     4879                        <li><tt>accept-ext</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.52"><b>10.11</b></a></li>
     4880                        <li><tt>Accept-Language</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.56"><b>10.14</b></a></li>
     4881                        <li><tt>accept-params</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.51"><b>10.11</b></a></li>
     4882                        <li><tt>Allow</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.34"><b>10.1</b></a></li>
    48884883                        <li><tt>asctime-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.21"><b>6.1</b></a></li>
    4889                         <li><tt>attribute</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.31"><b>7.3</b></a></li>
    4890                         <li><tt>charset</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.24"><b>7.1</b></a></li>
    4891                         <li><tt>codings</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.55"><b>11.13</b></a></li>
    4892                         <li><tt>content-coding</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.25"><b>7.2</b></a></li>
    4893                         <li><tt>Content-Encoding</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.58"><b>11.15</b></a></li>
    4894                         <li><tt>Content-Language</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.59"><b>11.16</b></a></li>
    4895                         <li><tt>Content-Location</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.60"><b>11.17</b></a></li>
    4896                         <li><tt>Content-Type</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.61"><b>11.18</b></a></li>
    4897                         <li><tt>Date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.35"><b>11.2</b></a></li>
     4884                        <li><tt>attribute</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.31"><b>6.5</b></a></li>
     4885                        <li><tt>charset</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.24"><b>6.3</b></a></li>
     4886                        <li><tt>codings</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.55"><b>10.13</b></a></li>
     4887                        <li><tt>content-coding</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.25"><b>6.4</b></a></li>
     4888                        <li><tt>Content-Encoding</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.58"><b>10.15</b></a></li>
     4889                        <li><tt>Content-Language</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.59"><b>10.16</b></a></li>
     4890                        <li><tt>Content-Location</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.60"><b>10.17</b></a></li>
     4891                        <li><tt>Content-Type</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.61"><b>10.18</b></a></li>
     4892                        <li><tt>Date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.35"><b>10.2</b></a></li>
    48984893                        <li><tt>date1</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.8"><b>6.1</b></a></li>
    48994894                        <li><tt>day</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.15"><b>6.1</b></a></li>
    49004895                        <li><tt>day-name</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.13"><b>6.1</b></a></li>
    49014896                        <li><tt>day-name-l</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.14"><b>6.1</b></a></li>
    4902                         <li><tt>delta-seconds</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.46"><b>11.8</b></a></li>
    4903                         <li><tt>Expect</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.36"><b>11.3</b></a></li>
    4904                         <li><tt>expect-name</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.40"><b>11.3</b></a></li>
    4905                         <li><tt>expect-param</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.38"><b>11.3</b></a></li>
    4906                         <li><tt>expect-value</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.39"><b>11.3</b></a></li>
    4907                         <li><tt>expectation</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.37"><b>11.3</b></a></li>
     4897                        <li><tt>delta-seconds</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.46"><b>10.8</b></a></li>
     4898                        <li><tt>Expect</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.36"><b>10.3</b></a></li>
     4899                        <li><tt>expect-name</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.40"><b>10.3</b></a></li>
     4900                        <li><tt>expect-param</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.38"><b>10.3</b></a></li>
     4901                        <li><tt>expect-value</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.39"><b>10.3</b></a></li>
     4902                        <li><tt>expectation</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.37"><b>10.3</b></a></li>
    49084903                        <li><tt>extension-code</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.4"><b>4</b></a></li>
    4909                         <li><tt>From</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.41"><b>11.4</b></a></li>
     4904                        <li><tt>From</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.41"><b>10.4</b></a></li>
    49104905                        <li><tt>GMT</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.18"><b>6.1</b></a></li>
    49114906                        <li><tt>hour</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.10"><b>6.1</b></a></li>
    49124907                        <li><tt>HTTP-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.6"><b>6.1</b></a></li>
    4913                         <li><tt>language-range</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.57"><b>11.14</b></a></li>
    4914                         <li><tt>language-tag</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.33"><b>7.4</b></a></li>
    4915                         <li><tt>Location</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.42"><b>11.5</b></a></li>
    4916                         <li><tt>Max-Forwards</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.43"><b>11.6</b></a></li>
    4917                         <li><tt>media-range</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.50"><b>11.11</b></a></li>
    4918                         <li><tt>media-type</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.27"><b>7.3</b></a></li>
     4908                        <li><tt>language-range</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.57"><b>10.14</b></a></li>
     4909                        <li><tt>language-tag</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.33"><b>6.6</b></a></li>
     4910                        <li><tt>Location</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.42"><b>10.5</b></a></li>
     4911                        <li><tt>Max-Forwards</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.43"><b>10.6</b></a></li>
     4912                        <li><tt>media-range</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.50"><b>10.11</b></a></li>
     4913                        <li><tt>media-type</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.27"><b>6.5</b></a></li>
    49194914                        <li><tt>method</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.1"><b>2</b></a></li>
    49204915                        <li><tt>MIME-Version</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.62"><b>A.1</b></a></li>
     
    49224917                        <li><tt>month</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.16"><b>6.1</b></a></li>
    49234918                        <li><tt>obs-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.19"><b>6.1</b></a></li>
    4924                         <li><tt>parameter</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.30"><b>7.3</b></a></li>
     4919                        <li><tt>parameter</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.30"><b>6.5</b></a></li>
    49254920                        <li><tt>product</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.22"><b>6.2</b></a></li>
    49264921                        <li><tt>product-version</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.23"><b>6.2</b></a></li>
    49274922                        <li><tt>reason-phrase</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.5"><b>4</b></a></li>
    4928                         <li><tt>Referer</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.44"><b>11.7</b></a></li>
    4929                         <li><tt>Retry-After</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.45"><b>11.8</b></a></li>
     4923                        <li><tt>Referer</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.44"><b>10.7</b></a></li>
     4924                        <li><tt>Retry-After</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.45"><b>10.8</b></a></li>
    49304925                        <li><tt>rfc1123-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.7"><b>6.1</b></a></li>
    49314926                        <li><tt>rfc850-date</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.20"><b>6.1</b></a></li>
    49324927                        <li><tt>second</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.12"><b>6.1</b></a></li>
    4933                         <li><tt>Server</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.47"><b>11.9</b></a></li>
     4928                        <li><tt>Server</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.47"><b>10.9</b></a></li>
    49344929                        <li><tt>status-code</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.3"><b>4</b></a></li>
    4935                         <li><tt>subtype</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.29"><b>7.3</b></a></li>
     4930                        <li><tt>subtype</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.29"><b>6.5</b></a></li>
    49364931                        <li><tt>time-of-day</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.9"><b>6.1</b></a></li>
    4937                         <li><tt>type</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.28"><b>7.3</b></a></li>
    4938                         <li><tt>User-Agent</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.48"><b>11.10</b></a></li>
    4939                         <li><tt>value</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.32"><b>7.3</b></a></li>
     4932                        <li><tt>type</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.28"><b>6.5</b></a></li>
     4933                        <li><tt>User-Agent</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.48"><b>10.10</b></a></li>
     4934                        <li><tt>value</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.32"><b>6.5</b></a></li>
    49404935                        <li><tt>year</tt>&nbsp;&nbsp;<a href="#rfc.iref.g.17"><b>6.1</b></a></li>
    49414936                     </ul>
    49424937                  </li>
    4943                   <li>gzip (Coding Format)&nbsp;&nbsp;<a href="#rfc.iref.g.26">7.2</a></li>
     4938                  <li>gzip (Coding Format)&nbsp;&nbsp;<a href="#rfc.iref.g.26">6.4</a></li>
    49444939               </ul>
    49454940            </li>
    49464941            <li><a id="rfc.index.H" href="#rfc.index.H"><b>H</b></a><ul>
    4947                   <li>HEAD method&nbsp;&nbsp;<a href="#rfc.iref.h.1"><b>2.3.3</b></a>, <a href="#rfc.xref.HEAD.1">12.1</a></li>
     4942                  <li>HEAD method&nbsp;&nbsp;<a href="#rfc.iref.h.1"><b>2.3.3</b></a>, <a href="#rfc.xref.HEAD.1">11.1</a></li>
    49484943                  <li>Header Fields&nbsp;&nbsp;
    49494944                     <ul>
    4950                         <li>Accept&nbsp;&nbsp;<a href="#rfc.xref.header.accept.1">3.2</a>, <a href="#rfc.xref.header.accept.2">7.3</a>, <a href="#rfc.xref.header.accept.3">10.1</a>, <a href="#rfc.iref.h.12"><b>11.11</b></a>, <a href="#rfc.xref.header.accept.4">12.3</a></li>
    4951                         <li>Accept-Charset&nbsp;&nbsp;<a href="#rfc.xref.header.accept-charset.1">3.2</a>, <a href="#rfc.xref.header.accept-charset.2">10.1</a>, <a href="#rfc.iref.h.13"><b>11.12</b></a>, <a href="#rfc.xref.header.accept-charset.3">12.3</a>, <a href="#rfc.xref.header.accept-charset.4">C</a></li>
    4952                         <li>Accept-Encoding&nbsp;&nbsp;<a href="#rfc.xref.header.accept-encoding.1">3.2</a>, <a href="#rfc.xref.header.accept-encoding.2">7.2</a>, <a href="#rfc.xref.header.accept-encoding.3">10.1</a>, <a href="#rfc.iref.h.14"><b>11.13</b></a>, <a href="#rfc.xref.header.accept-encoding.4">12.3</a>, <a href="#rfc.xref.header.accept-encoding.5">12.4</a></li>
    4953                         <li>Accept-Language&nbsp;&nbsp;<a href="#rfc.xref.header.accept-language.1">3.2</a>, <a href="#rfc.xref.header.accept-language.2">10.1</a>, <a href="#rfc.iref.h.15"><b>11.14</b></a>, <a href="#rfc.xref.header.accept-language.3">12.3</a></li>
    4954                         <li>Allow&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">2</a>, <a href="#rfc.xref.header.allow.2">3.3</a>, <a href="#rfc.iref.h.2"><b>11.1</b></a>, <a href="#rfc.xref.header.allow.3">12.3</a>, <a href="#rfc.xref.header.allow.4">C</a></li>
    4955                         <li>Content-Encoding&nbsp;&nbsp;<a href="#rfc.xref.header.content-encoding.1">7.2</a>, <a href="#rfc.xref.header.content-encoding.2">9.1</a>, <a href="#rfc.iref.h.16"><b>11.15</b></a>, <a href="#rfc.xref.header.content-encoding.3">11.15</a>, <a href="#rfc.xref.header.content-encoding.4">12.3</a></li>
    4956                         <li>Content-Language&nbsp;&nbsp;<a href="#rfc.xref.header.content-language.1">9.1</a>, <a href="#rfc.iref.h.17"><b>11.16</b></a>, <a href="#rfc.xref.header.content-language.2">12.3</a></li>
    4957                         <li>Content-Location&nbsp;&nbsp;<a href="#rfc.xref.header.content-location.1">2.3.4</a>, <a href="#rfc.xref.header.content-location.2">9.1</a>, <a href="#rfc.xref.header.content-location.3">11.5</a>, <a href="#rfc.iref.h.18"><b>11.17</b></a>, <a href="#rfc.xref.header.content-location.4">12.3</a>, <a href="#rfc.xref.header.content-location.5">C</a></li>
     4945                        <li>Accept&nbsp;&nbsp;<a href="#rfc.xref.header.accept.1">3.2</a>, <a href="#rfc.xref.header.accept.2">6.5</a>, <a href="#rfc.xref.header.accept.3">9.1</a>, <a href="#rfc.iref.h.12"><b>10.11</b></a>, <a href="#rfc.xref.header.accept.4">11.3</a></li>
     4946                        <li>Accept-Charset&nbsp;&nbsp;<a href="#rfc.xref.header.accept-charset.1">3.2</a>, <a href="#rfc.xref.header.accept-charset.2">9.1</a>, <a href="#rfc.iref.h.13"><b>10.12</b></a>, <a href="#rfc.xref.header.accept-charset.3">11.3</a>, <a href="#rfc.xref.header.accept-charset.4">C</a></li>
     4947                        <li>Accept-Encoding&nbsp;&nbsp;<a href="#rfc.xref.header.accept-encoding.1">3.2</a>, <a href="#rfc.xref.header.accept-encoding.2">6.4</a>, <a href="#rfc.xref.header.accept-encoding.3">9.1</a>, <a href="#rfc.iref.h.14"><b>10.13</b></a>, <a href="#rfc.xref.header.accept-encoding.4">11.3</a>, <a href="#rfc.xref.header.accept-encoding.5">11.4</a></li>
     4948                        <li>Accept-Language&nbsp;&nbsp;<a href="#rfc.xref.header.accept-language.1">3.2</a>, <a href="#rfc.xref.header.accept-language.2">9.1</a>, <a href="#rfc.iref.h.15"><b>10.14</b></a>, <a href="#rfc.xref.header.accept-language.3">11.3</a></li>
     4949                        <li>Allow&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">2</a>, <a href="#rfc.xref.header.allow.2">3.3</a>, <a href="#rfc.iref.h.2"><b>10.1</b></a>, <a href="#rfc.xref.header.allow.3">11.3</a>, <a href="#rfc.xref.header.allow.4">C</a></li>
     4950                        <li>Content-Encoding&nbsp;&nbsp;<a href="#rfc.xref.header.content-encoding.1">6.4</a>, <a href="#rfc.xref.header.content-encoding.2">8.1</a>, <a href="#rfc.iref.h.16"><b>10.15</b></a>, <a href="#rfc.xref.header.content-encoding.3">10.15</a>, <a href="#rfc.xref.header.content-encoding.4">11.3</a></li>
     4951                        <li>Content-Language&nbsp;&nbsp;<a href="#rfc.xref.header.content-language.1">8.1</a>, <a href="#rfc.iref.h.17"><b>10.16</b></a>, <a href="#rfc.xref.header.content-language.2">11.3</a></li>
     4952                        <li>Content-Location&nbsp;&nbsp;<a href="#rfc.xref.header.content-location.1">2.3.4</a>, <a href="#rfc.xref.header.content-location.2">8.1</a>, <a href="#rfc.xref.header.content-location.3">10.5</a>, <a href="#rfc.iref.h.18"><b>10.17</b></a>, <a href="#rfc.xref.header.content-location.4">11.3</a>, <a href="#rfc.xref.header.content-location.5">C</a></li>
    49584953                        <li>Content-Transfer-Encoding&nbsp;&nbsp;<a href="#rfc.iref.h.21">A.5</a>, <a href="#rfc.xref.no.content-transfer-encoding.1">C</a></li>
    4959                         <li>Content-Type&nbsp;&nbsp;<a href="#rfc.xref.header.content-type.1">3.1</a>, <a href="#rfc.xref.header.content-type.2">4</a>, <a href="#rfc.xref.header.content-type.3">7.3</a>, <a href="#rfc.xref.header.content-type.4">9.1</a>, <a href="#rfc.iref.h.19"><b>11.18</b></a>, <a href="#rfc.xref.header.content-type.5">12.3</a></li>
    4960                         <li>Date&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3.3</a>, <a href="#rfc.iref.h.3"><b>11.2</b></a>, <a href="#rfc.xref.header.date.2">12.3</a></li>
    4961                         <li>Expect&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">3.2</a>, <a href="#rfc.xref.header.expect.2">4.6.14</a>, <a href="#rfc.iref.h.4"><b>11.3</b></a>, <a href="#rfc.xref.header.expect.3">12.3</a>, <a href="#rfc.xref.header.expect.4">C</a></li>
    4962                         <li>From&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">3.2</a>, <a href="#rfc.iref.h.5"><b>11.4</b></a>, <a href="#rfc.xref.header.from.2">12.3</a></li>
    4963                         <li>Location&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">2.3.4</a>, <a href="#rfc.xref.header.location.2">3.3</a>, <a href="#rfc.xref.header.location.3">4.5</a>, <a href="#rfc.iref.h.6"><b>11.5</b></a>, <a href="#rfc.xref.header.location.4">12.3</a>, <a href="#rfc.xref.header.location.5">C</a></li>
    4964                         <li>Max-Forwards&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">2.3.1</a>, <a href="#rfc.xref.header.max-forwards.2">2.3.7</a>, <a href="#rfc.xref.header.max-forwards.3">3.2</a>, <a href="#rfc.iref.h.7"><b>11.6</b></a>, <a href="#rfc.xref.header.max-forwards.4">12.3</a>, <a href="#rfc.xref.header.max-forwards.5">C</a></li>
    4965                         <li>MIME-Version&nbsp;&nbsp;<a href="#rfc.xref.mime-version.1">12.3</a>, <a href="#rfc.iref.h.20"><b>A.1</b></a></li>
    4966                         <li>Referer&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">3.2</a>, <a href="#rfc.iref.h.8"><b>11.7</b></a>, <a href="#rfc.xref.header.referer.2">12.3</a>, <a href="#rfc.xref.header.referer.3">C</a></li>
    4967                         <li>Retry-After&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">3.3</a>, <a href="#rfc.xref.header.retry-after.2">4.7.4</a>, <a href="#rfc.iref.h.9"><b>11.8</b></a>, <a href="#rfc.xref.header.retry-after.3">12.3</a></li>
    4968                         <li>Server&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">3.3</a>, <a href="#rfc.iref.h.10"><b>11.9</b></a>, <a href="#rfc.xref.header.server.2">12.3</a>, <a href="#rfc.xref.header.server.3">13.1</a>, <a href="#rfc.xref.header.server.4">C</a></li>
    4969                         <li>User-Agent&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.2</a>, <a href="#rfc.xref.header.user-agent.2">10.1</a>, <a href="#rfc.iref.h.11"><b>11.10</b></a>, <a href="#rfc.xref.header.user-agent.3">12.3</a>, <a href="#rfc.xref.header.user-agent.4">13.1</a></li>
     4954                        <li>Content-Type&nbsp;&nbsp;<a href="#rfc.xref.header.content-type.1">3.1</a>, <a href="#rfc.xref.header.content-type.2">4</a>, <a href="#rfc.xref.header.content-type.3">6.5</a>, <a href="#rfc.xref.header.content-type.4">8.1</a>, <a href="#rfc.iref.h.19"><b>10.18</b></a>, <a href="#rfc.xref.header.content-type.5">11.3</a></li>
     4955                        <li>Date&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3.3</a>, <a href="#rfc.iref.h.3"><b>10.2</b></a>, <a href="#rfc.xref.header.date.2">11.3</a></li>
     4956                        <li>Expect&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">3.2</a>, <a href="#rfc.xref.header.expect.2">4.6.14</a>, <a href="#rfc.iref.h.4"><b>10.3</b></a>, <a href="#rfc.xref.header.expect.3">11.3</a>, <a href="#rfc.xref.header.expect.4">C</a></li>
     4957                        <li>From&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">3.2</a>, <a href="#rfc.iref.h.5"><b>10.4</b></a>, <a href="#rfc.xref.header.from.2">11.3</a></li>
     4958                        <li>Location&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">2.3.4</a>, <a href="#rfc.xref.header.location.2">3.3</a>, <a href="#rfc.xref.header.location.3">4.5</a>, <a href="#rfc.iref.h.6"><b>10.5</b></a>, <a href="#rfc.xref.header.location.4">11.3</a>, <a href="#rfc.xref.header.location.5">C</a></li>
     4959                        <li>Max-Forwards&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">2.3.1</a>, <a href="#rfc.xref.header.max-forwards.2">2.3.7</a>, <a href="#rfc.xref.header.max-forwards.3">3.2</a>, <a href="#rfc.iref.h.7"><b>10.6</b></a>, <a href="#rfc.xref.header.max-forwards.4">11.3</a>, <a href="#rfc.xref.header.max-forwards.5">C</a></li>
     4960                        <li>MIME-Version&nbsp;&nbsp;<a href="#rfc.xref.mime-version.1">11.3</a>, <a href="#rfc.iref.h.20"><b>A.1</b></a></li>
     4961                        <li>Referer&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">3.2</a>, <a href="#rfc.iref.h.8"><b>10.7</b></a>, <a href="#rfc.xref.header.referer.2">11.3</a>, <a href="#rfc.xref.header.referer.3">C</a></li>
     4962                        <li>Retry-After&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">3.3</a>, <a href="#rfc.xref.header.retry-after.2">4.7.4</a>, <a href="#rfc.iref.h.9"><b>10.8</b></a>, <a href="#rfc.xref.header.retry-after.3">11.3</a></li>
     4963                        <li>Server&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">3.3</a>, <a href="#rfc.iref.h.10"><b>10.9</b></a>, <a href="#rfc.xref.header.server.2">11.3</a>, <a href="#rfc.xref.header.server.3">12.1</a>, <a href="#rfc.xref.header.server.4">C</a></li>
     4964                        <li>User-Agent&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.2</a>, <a href="#rfc.xref.header.user-agent.2">9.1</a>, <a href="#rfc.iref.h.11"><b>10.10</b></a>, <a href="#rfc.xref.header.user-agent.3">11.3</a>, <a href="#rfc.xref.header.user-agent.4">12.1</a></li>
    49704965                     </ul>
    49714966                  </li>
     
    49774972            </li>
    49784973            <li><a id="rfc.index.L" href="#rfc.index.L"><b>L</b></a><ul>
    4979                   <li>Location header field&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">2.3.4</a>, <a href="#rfc.xref.header.location.2">3.3</a>, <a href="#rfc.xref.header.location.3">4.5</a>, <a href="#rfc.iref.l.1"><b>11.5</b></a>, <a href="#rfc.xref.header.location.4">12.3</a>, <a href="#rfc.xref.header.location.5">C</a></li>
     4974                  <li>Location header field&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">2.3.4</a>, <a href="#rfc.xref.header.location.2">3.3</a>, <a href="#rfc.xref.header.location.3">4.5</a>, <a href="#rfc.iref.l.1"><b>10.5</b></a>, <a href="#rfc.xref.header.location.4">11.3</a>, <a href="#rfc.xref.header.location.5">C</a></li>
    49804975               </ul>
    49814976            </li>
    49824977            <li><a id="rfc.index.M" href="#rfc.index.M"><b>M</b></a><ul>
    4983                   <li>Max-Forwards header field&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">2.3.1</a>, <a href="#rfc.xref.header.max-forwards.2">2.3.7</a>, <a href="#rfc.xref.header.max-forwards.3">3.2</a>, <a href="#rfc.iref.m.9"><b>11.6</b></a>, <a href="#rfc.xref.header.max-forwards.4">12.3</a>, <a href="#rfc.xref.header.max-forwards.5">C</a></li>
     4978                  <li>Max-Forwards header field&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">2.3.1</a>, <a href="#rfc.xref.header.max-forwards.2">2.3.7</a>, <a href="#rfc.xref.header.max-forwards.3">3.2</a>, <a href="#rfc.iref.m.9"><b>10.6</b></a>, <a href="#rfc.xref.header.max-forwards.4">11.3</a>, <a href="#rfc.xref.header.max-forwards.5">C</a></li>
    49844979                  <li>Methods&nbsp;&nbsp;
    49854980                     <ul>
    4986                         <li>CONNECT&nbsp;&nbsp;<a href="#rfc.iref.m.8"><b>2.3.8</b></a>, <a href="#rfc.xref.CONNECT.1">12.1</a>, <a href="#rfc.xref.CONNECT.2">C</a></li>
    4987                         <li>DELETE&nbsp;&nbsp;<a href="#rfc.iref.m.6"><b>2.3.6</b></a>, <a href="#rfc.xref.DELETE.1">12.1</a></li>
    4988                         <li>GET&nbsp;&nbsp;<a href="#rfc.iref.m.2"><b>2.3.2</b></a>, <a href="#rfc.xref.GET.1">12.1</a></li>
    4989                         <li>HEAD&nbsp;&nbsp;<a href="#rfc.iref.m.3"><b>2.3.3</b></a>, <a href="#rfc.xref.HEAD.1">12.1</a></li>
    4990                         <li>OPTIONS&nbsp;&nbsp;<a href="#rfc.iref.m.1"><b>2.3.1</b></a>, <a href="#rfc.xref.OPTIONS.1">11.6</a>, <a href="#rfc.xref.OPTIONS.2">12.1</a></li>
    4991                         <li>POST&nbsp;&nbsp;<a href="#rfc.iref.m.4"><b>2.3.4</b></a>, <a href="#rfc.xref.POST.1">12.1</a>, <a href="#rfc.xref.POST.2">C</a></li>
    4992                         <li>PUT&nbsp;&nbsp;<a href="#rfc.iref.m.5"><b>2.3.5</b></a>, <a href="#rfc.xref.PUT.1">12.1</a>, <a href="#rfc.xref.PUT.2">C</a></li>
    4993                         <li>TRACE&nbsp;&nbsp;<a href="#rfc.iref.m.7"><b>2.3.7</b></a>, <a href="#rfc.xref.TRACE.1">11.6</a>, <a href="#rfc.xref.TRACE.2">12.1</a>, <a href="#rfc.xref.TRACE.3">13.1</a></li>
     4981                        <li>CONNECT&nbsp;&nbsp;<a href="#rfc.iref.m.8"><b>2.3.8</b></a>, <a href="#rfc.xref.CONNECT.1">11.1</a>, <a href="#rfc.xref.CONNECT.2">C</a></li>
     4982                        <li>DELETE&nbsp;&nbsp;<a href="#rfc.iref.m.6"><b>2.3.6</b></a>, <a href="#rfc.xref.DELETE.1">11.1</a></li>
     4983                        <li>GET&nbsp;&nbsp;<a href="#rfc.iref.m.2"><b>2.3.2</b></a>, <a href="#rfc.xref.GET.1">11.1</a></li>
     4984                        <li>HEAD&nbsp;&nbsp;<a href="#rfc.iref.m.3"><b>2.3.3</b></a>, <a href="#rfc.xref.HEAD.1">11.1</a></li>
     4985                        <li>OPTIONS&nbsp;&nbsp;<a href="#rfc.iref.m.1"><b>2.3.1</b></a>, <a href="#rfc.xref.OPTIONS.1">10.6</a>, <a href="#rfc.xref.OPTIONS.2">11.1</a></li>
     4986                        <li>POST&nbsp;&nbsp;<a href="#rfc.iref.m.4"><b>2.3.4</b></a>, <a href="#rfc.xref.POST.1">11.1</a>, <a href="#rfc.xref.POST.2">C</a></li>
     4987                        <li>PUT&nbsp;&nbsp;<a href="#rfc.iref.m.5"><b>2.3.5</b></a>, <a href="#rfc.xref.PUT.1">11.1</a>, <a href="#rfc.xref.PUT.2">C</a></li>
     4988                        <li>TRACE&nbsp;&nbsp;<a href="#rfc.iref.m.7"><b>2.3.7</b></a>, <a href="#rfc.xref.TRACE.1">10.6</a>, <a href="#rfc.xref.TRACE.2">11.1</a>, <a href="#rfc.xref.TRACE.3">12.1</a></li>
    49944989                     </ul>
    49954990                  </li>
    4996                   <li>MIME-Version header field&nbsp;&nbsp;<a href="#rfc.xref.mime-version.1">12.3</a>, <a href="#rfc.iref.m.10"><b>A.1</b></a></li>
     4991                  <li>MIME-Version header field&nbsp;&nbsp;<a href="#rfc.xref.mime-version.1">11.3</a>, <a href="#rfc.iref.m.10"><b>A.1</b></a></li>
    49974992               </ul>
    49984993            </li>
    49994994            <li><a id="rfc.index.O" href="#rfc.index.O"><b>O</b></a><ul>
    5000                   <li>OPTIONS method&nbsp;&nbsp;<a href="#rfc.iref.o.1"><b>2.3.1</b></a>, <a href="#rfc.xref.OPTIONS.1">11.6</a>, <a href="#rfc.xref.OPTIONS.2">12.1</a></li>
     4995                  <li>OPTIONS method&nbsp;&nbsp;<a href="#rfc.iref.o.1"><b>2.3.1</b></a>, <a href="#rfc.xref.OPTIONS.1">10.6</a>, <a href="#rfc.xref.OPTIONS.2">11.1</a></li>
    50014996               </ul>
    50024997            </li>
    50034998            <li><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul>
    5004                   <li><em>Part1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.1">1</a>, <a href="#rfc.xref.Part1.2">1.2</a>, <a href="#rfc.xref.Part1.3">1.3</a>, <a href="#rfc.xref.Part1.4">1.3.1</a>, <a href="#rfc.xref.Part1.5">1.3.1</a>, <a href="#rfc.xref.Part1.6">1.3.1</a>, <a href="#rfc.xref.Part1.7">1.3.1</a>, <a href="#rfc.xref.Part1.8">1.3.1</a>, <a href="#rfc.xref.Part1.9">1.3.1</a>, <a href="#rfc.xref.Part1.10">1.3.1</a>, <a href="#rfc.xref.Part1.11">1.3.2</a>, <a href="#rfc.xref.Part1.12">1.3.2</a>, <a href="#rfc.xref.Part1.13">1.3.2</a>, <a href="#rfc.xref.Part1.14">1.3.2</a>, <a href="#rfc.xref.Part1.15">2</a>, <a href="#rfc.xref.Part1.16">2.2.1</a>, <a href="#rfc.xref.Part1.17">2.3.1</a>, <a href="#rfc.xref.Part1.18">2.3.7</a>, <a href="#rfc.xref.Part1.19">2.3.7</a>, <a href="#rfc.xref.Part1.20">2.3.8</a>, <a href="#rfc.xref.Part1.21">3</a>, <a href="#rfc.xref.Part1.22">3.1</a>, <a href="#rfc.xref.Part1.23">3.1</a>, <a href="#rfc.xref.Part1.24">3.1</a>, <a href="#rfc.xref.Part1.25">3.1</a>, <a href="#rfc.xref.Part1.26">3.1</a>, <a href="#rfc.xref.Part1.27">3.2</a>, <a href="#rfc.xref.Part1.28">3.2</a>, <a href="#rfc.xref.Part1.29">3.3</a>, <a href="#rfc.xref.Part1.30">4.3.1</a>, <a href="#rfc.xref.Part1.31">4.3.2</a>, <a href="#rfc.xref.Part1.32">4.4.4</a>, <a href="#rfc.xref.Part1.33">4.4.6</a>, <a href="#rfc.xref.Part1.34">4.6.15</a>, <a href="#rfc.xref.Part1.35">4.7.6</a>, <a href="#rfc.xref.Part1.36">5</a>, <a href="#rfc.xref.Part1.37">5.1</a>, <a href="#rfc.xref.Part1.38">7.2</a>, <a href="#rfc.xref.Part1.39">7.2</a>, <a href="#rfc.xref.Part1.40">7.2</a>, <a href="#rfc.xref.Part1.41">7.2.1</a>, <a href="#rfc.xref.Part1.42">7.2.1</a>, <a href="#rfc.xref.Part1.43">8.1</a>, <a href="#rfc.xref.Part1.44">8.2</a>, <a href="#rfc.xref.Part1.45">11.3</a>, <a href="#rfc.xref.Part1.46">11.9</a>, <a href="#rfc.xref.Part1.47">11.9</a>, <a href="#rfc.xref.Part1.48">11.10</a>, <a href="#rfc.xref.Part1.49">11.17</a>, <a href="#rfc.xref.Part1.50">12.4</a>, <a href="#rfc.xref.Part1.51">12.4</a>, <a href="#rfc.xref.Part1.52">12.4</a>, <a href="#rfc.xref.Part1.53">14</a>, <a href="#Part1"><b>15.1</b></a>, <a href="#rfc.xref.Part1.54">A.6</a>, <a href="#rfc.xref.Part1.55">C</a><ul>
     4999                  <li><em>Part1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.1">1</a>, <a href="#rfc.xref.Part1.2">1.2</a>, <a href="#rfc.xref.Part1.3">1.3</a>, <a href="#rfc.xref.Part1.4">1.3.1</a>, <a href="#rfc.xref.Part1.5">1.3.1</a>, <a href="#rfc.xref.Part1.6">1.3.1</a>, <a href="#rfc.xref.Part1.7">1.3.1</a>, <a href="#rfc.xref.Part1.8">1.3.1</a>, <a href="#rfc.xref.Part1.9">1.3.1</a>, <a href="#rfc.xref.Part1.10">1.3.1</a>, <a href="#rfc.xref.Part1.11">1.3.2</a>, <a href="#rfc.xref.Part1.12">1.3.2</a>, <a href="#rfc.xref.Part1.13">1.3.2</a>, <a href="#rfc.xref.Part1.14">1.3.2</a>, <a href="#rfc.xref.Part1.15">2</a>, <a href="#rfc.xref.Part1.16">2.2.1</a>, <a href="#rfc.xref.Part1.17">2.3.1</a>, <a href="#rfc.xref.Part1.18">2.3.7</a>, <a href="#rfc.xref.Part1.19">2.3.7</a>, <a href="#rfc.xref.Part1.20">2.3.8</a>, <a href="#rfc.xref.Part1.21">3</a>, <a href="#rfc.xref.Part1.22">3.1</a>, <a href="#rfc.xref.Part1.23">3.1</a>, <a href="#rfc.xref.Part1.24">3.1</a>, <a href="#rfc.xref.Part1.25">3.1</a>, <a href="#rfc.xref.Part1.26">3.1</a>, <a href="#rfc.xref.Part1.27">3.2</a>, <a href="#rfc.xref.Part1.28">3.2</a>, <a href="#rfc.xref.Part1.29">3.3</a>, <a href="#rfc.xref.Part1.30">4.3.1</a>, <a href="#rfc.xref.Part1.31">4.3.2</a>, <a href="#rfc.xref.Part1.32">4.4.4</a>, <a href="#rfc.xref.Part1.33">4.4.6</a>, <a href="#rfc.xref.Part1.34">4.6.15</a>, <a href="#rfc.xref.Part1.35">4.7.6</a>, <a href="#rfc.xref.Part1.36">5</a>, <a href="#rfc.xref.Part1.37">5.1</a>, <a href="#rfc.xref.Part1.38">6.4</a>, <a href="#rfc.xref.Part1.39">6.4</a>, <a href="#rfc.xref.Part1.40">6.4</a>, <a href="#rfc.xref.Part1.41">6.4.1</a>, <a href="#rfc.xref.Part1.42">6.4.1</a>, <a href="#rfc.xref.Part1.43">7.1</a>, <a href="#rfc.xref.Part1.44">7.2</a>, <a href="#rfc.xref.Part1.45">10.3</a>, <a href="#rfc.xref.Part1.46">10.9</a>, <a href="#rfc.xref.Part1.47">10.9</a>, <a href="#rfc.xref.Part1.48">10.10</a>, <a href="#rfc.xref.Part1.49">10.17</a>, <a href="#rfc.xref.Part1.50">11.4</a>, <a href="#rfc.xref.Part1.51">11.4</a>, <a href="#rfc.xref.Part1.52">11.4</a>, <a href="#rfc.xref.Part1.53">13</a>, <a href="#Part1"><b>14.1</b></a>, <a href="#rfc.xref.Part1.54">A.6</a>, <a href="#rfc.xref.Part1.55">C</a><ul>
    50055000                        <li><em>Section 1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.3">1.3</a></li>
    50065001                        <li><em>Section 2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.2">1.2</a></li>
     
    50095004                        <li><em>Section 2.7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.11">1.3.2</a>, <a href="#rfc.xref.Part1.13">1.3.2</a>, <a href="#rfc.xref.Part1.14">1.3.2</a></li>
    50105005                        <li><em>Section 3.2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.5">1.3.1</a>, <a href="#rfc.xref.Part1.6">1.3.1</a>, <a href="#rfc.xref.Part1.7">1.3.1</a></li>
    5011                         <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.21">3</a>, <a href="#rfc.xref.Part1.24">3.1</a>, <a href="#rfc.xref.Part1.46">11.9</a>, <a href="#rfc.xref.Part1.48">11.10</a></li>
     5006                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.21">3</a>, <a href="#rfc.xref.Part1.24">3.1</a>, <a href="#rfc.xref.Part1.46">10.9</a>, <a href="#rfc.xref.Part1.48">10.10</a></li>
    50125007                        <li><em>Section 3.2.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.8">1.3.1</a>, <a href="#rfc.xref.Part1.9">1.3.1</a>, <a href="#rfc.xref.Part1.10">1.3.1</a>, <a href="#rfc.xref.Part1.12">1.3.2</a>, <a href="#rfc.xref.Part1.23">3.1</a></li>
    50135008                        <li><em>Section 3.2.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.22">3.1</a></li>
    5014                         <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.16">2.2.1</a>, <a href="#rfc.xref.Part1.33">4.4.6</a>, <a href="#rfc.xref.Part1.36">5</a>, <a href="#rfc.xref.Part1.44">8.2</a></li>
     5009                        <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.16">2.2.1</a>, <a href="#rfc.xref.Part1.33">4.4.6</a>, <a href="#rfc.xref.Part1.36">5</a>, <a href="#rfc.xref.Part1.44">7.2</a></li>
    50155010                        <li><em>Section 3.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.54">A.6</a></li>
    5016                         <li><em>Section 3.3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.43">8.1</a></li>
    5017                         <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.41">7.2.1</a></li>
     5011                        <li><em>Section 3.3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.43">7.1</a></li>
     5012                        <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.41">6.4.1</a></li>
    50185013                        <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.26">3.1</a></li>
    5019                         <li><em>Section 4.2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.38">7.2</a>, <a href="#rfc.xref.Part1.50">12.4</a></li>
    5020                         <li><em>Section 4.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.42">7.2.1</a></li>
    5021                         <li><em>Section 4.2.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.39">7.2</a>, <a href="#rfc.xref.Part1.51">12.4</a></li>
    5022                         <li><em>Section 4.2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.40">7.2</a>, <a href="#rfc.xref.Part1.52">12.4</a></li>
     5014                        <li><em>Section 4.2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.38">6.4</a>, <a href="#rfc.xref.Part1.50">11.4</a></li>
     5015                        <li><em>Section 4.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.42">6.4.1</a></li>
     5016                        <li><em>Section 4.2.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.39">6.4</a>, <a href="#rfc.xref.Part1.51">11.4</a></li>
     5017                        <li><em>Section 4.2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.40">6.4</a>, <a href="#rfc.xref.Part1.52">11.4</a></li>
    50235018                        <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.28">3.2</a></li>
    50245019                        <li><em>Section 5.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.17">2.3.1</a>, <a href="#rfc.xref.Part1.20">2.3.8</a></li>
    50255020                        <li><em>Section 5.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.27">3.2</a></li>
    5026                         <li><em>Section 5.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.15">2</a>, <a href="#rfc.xref.Part1.29">3.3</a>, <a href="#rfc.xref.Part1.37">5.1</a>, <a href="#rfc.xref.Part1.49">11.17</a></li>
     5021                        <li><em>Section 5.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.15">2</a>, <a href="#rfc.xref.Part1.29">3.3</a>, <a href="#rfc.xref.Part1.37">5.1</a>, <a href="#rfc.xref.Part1.49">10.17</a></li>
    50275022                        <li><em>Section 6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.25">3.1</a></li>
    5028                         <li><em>Section 6.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.18">2.3.7</a>, <a href="#rfc.xref.Part1.47">11.9</a>, <a href="#rfc.xref.Part1.55">C</a></li>
    5029                         <li><em>Section 6.4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.30">4.3.1</a>, <a href="#rfc.xref.Part1.45">11.3</a></li>
     5023                        <li><em>Section 6.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.18">2.3.7</a>, <a href="#rfc.xref.Part1.47">10.9</a>, <a href="#rfc.xref.Part1.55">C</a></li>
     5024                        <li><em>Section 6.4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.30">4.3.1</a>, <a href="#rfc.xref.Part1.45">10.3</a></li>
    50305025                        <li><em>Section 6.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.31">4.3.2</a>, <a href="#rfc.xref.Part1.34">4.6.15</a></li>
    50315026                        <li><em>Section 7.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.19">2.3.7</a></li>
    5032                         <li><em>Section 9</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.53">14</a></li>
     5027                        <li><em>Section 9</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.53">13</a></li>
    50335028                     </ul>
    50345029                  </li>
    5035                   <li><em>Part4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3.2</a>, <a href="#rfc.xref.Part4.2">3.2</a>, <a href="#rfc.xref.Part4.3">3.2</a>, <a href="#rfc.xref.Part4.4">3.2</a>, <a href="#rfc.xref.Part4.5">3.3</a>, <a href="#rfc.xref.Part4.6">4.1</a>, <a href="#rfc.xref.Part4.7">4.1</a>, <a href="#rfc.xref.Part4.8">4.1</a>, <a href="#rfc.xref.Part4.9">4.4.2</a>, <a href="#rfc.xref.Part4.10">4.5</a>, <a href="#rfc.xref.Part4.11">9.1</a>, <a href="#rfc.xref.Part4.12">9.1</a>, <a href="#Part4"><b>15.1</b></a>, <a href="#rfc.xref.Part4.13">E.2</a><ul>
    5036                         <li><em>Section 2.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.12">9.1</a></li>
    5037                         <li><em>Section 2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.5">3.3</a>, <a href="#rfc.xref.Part4.9">4.4.2</a>, <a href="#rfc.xref.Part4.11">9.1</a></li>
     5030                  <li><em>Part4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3.2</a>, <a href="#rfc.xref.Part4.2">3.2</a>, <a href="#rfc.xref.Part4.3">3.2</a>, <a href="#rfc.xref.Part4.4">3.2</a>, <a href="#rfc.xref.Part4.5">3.3</a>, <a href="#rfc.xref.Part4.6">4.1</a>, <a href="#rfc.xref.Part4.7">4.1</a>, <a href="#rfc.xref.Part4.8">4.1</a>, <a href="#rfc.xref.Part4.9">4.4.2</a>, <a href="#rfc.xref.Part4.10">4.5</a>, <a href="#rfc.xref.Part4.11">8.1</a>, <a href="#rfc.xref.Part4.12">8.1</a>, <a href="#Part4"><b>14.1</b></a>, <a href="#rfc.xref.Part4.13">E.2</a><ul>
     5031                        <li><em>Section 2.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.12">8.1</a></li>
     5032                        <li><em>Section 2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.5">3.3</a>, <a href="#rfc.xref.Part4.9">4.4.2</a>, <a href="#rfc.xref.Part4.11">8.1</a></li>
    50385033                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3.2</a></li>
    50395034                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.3">3.2</a></li>
     
    50455040                     </ul>
    50465041                  </li>
    5047                   <li><em>Part5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">2.3.2</a>, <a href="#rfc.xref.Part5.2">3.2</a>, <a href="#rfc.xref.Part5.3">3.2</a>, <a href="#rfc.xref.Part5.4">3.3</a>, <a href="#rfc.xref.Part5.5">4.1</a>, <a href="#rfc.xref.Part5.6">4.1</a>, <a href="#rfc.xref.Part5.7">4.1</a>, <a href="#rfc.xref.Part5.8">8.1</a>, <a href="#Part5"><b>15.1</b></a><ul>
     5042                  <li><em>Part5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">2.3.2</a>, <a href="#rfc.xref.Part5.2">3.2</a>, <a href="#rfc.xref.Part5.3">3.2</a>, <a href="#rfc.xref.Part5.4">3.3</a>, <a href="#rfc.xref.Part5.5">4.1</a>, <a href="#rfc.xref.Part5.6">4.1</a>, <a href="#rfc.xref.Part5.7">4.1</a>, <a href="#rfc.xref.Part5.8">7.1</a>, <a href="#Part5"><b>14.1</b></a><ul>
    50485043                        <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.5">4.1</a></li>
    50495044                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.6">4.1</a></li>
    50505045                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.7">4.1</a></li>
    50515046                        <li><em>Section 5.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.4">3.3</a></li>
    5052                         <li><em>Section 5.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.8">8.1</a></li>
     5047                        <li><em>Section 5.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.8">7.1</a></li>
    50535048                        <li><em>Section 5.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.2">3.2</a></li>
    50545049                        <li><em>Section 5.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">2.3.2</a>, <a href="#rfc.xref.Part5.3">3.2</a></li>
    50555050                     </ul>
    50565051                  </li>
    5057                   <li><em>Part6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.1">2.2.1</a>, <a href="#rfc.xref.Part6.2">2.3.2</a>, <a href="#rfc.xref.Part6.3">2.3.3</a>, <a href="#rfc.xref.Part6.4">2.3.4</a>, <a href="#rfc.xref.Part6.5">2.3.5</a>, <a href="#rfc.xref.Part6.6">2.3.6</a>, <a href="#rfc.xref.Part6.7">3.1</a>, <a href="#rfc.xref.Part6.8">3.3</a>, <a href="#rfc.xref.Part6.9">3.3</a>, <a href="#rfc.xref.Part6.10">4.2.1</a>, <a href="#rfc.xref.Part6.11">4.4.1</a>, <a href="#rfc.xref.Part6.12">4.4.4</a>, <a href="#rfc.xref.Part6.13">4.4.4</a>, <a href="#rfc.xref.Part6.14">4.4.4</a>, <a href="#rfc.xref.Part6.15">4.5.1</a>, <a href="#rfc.xref.Part6.16">4.5.2</a>, <a href="#rfc.xref.Part6.17">4.6.9</a>, <a href="#rfc.xref.Part6.18">9.1</a>, <a href="#rfc.xref.Part6.19">10.1</a>, <a href="#Part6"><b>15.1</b></a><ul>
     5052                  <li><em>Part6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.1">2.2.1</a>, <a href="#rfc.xref.Part6.2">2.3.2</a>, <a href="#rfc.xref.Part6.3">2.3.3</a>, <a href="#rfc.xref.Part6.4">2.3.4</a>, <a href="#rfc.xref.Part6.5">2.3.5</a>, <a href="#rfc.xref.Part6.6">2.3.6</a>, <a href="#rfc.xref.Part6.7">3.1</a>, <a href="#rfc.xref.Part6.8">3.3</a>, <a href="#rfc.xref.Part6.9">3.3</a>, <a href="#rfc.xref.Part6.10">4.2.1</a>, <a href="#rfc.xref.Part6.11">4.4.1</a>, <a href="#rfc.xref.Part6.12">4.4.4</a>, <a href="#rfc.xref.Part6.13">4.4.4</a>, <a href="#rfc.xref.Part6.14">4.4.4</a>, <a href="#rfc.xref.Part6.15">4.5.1</a>, <a href="#rfc.xref.Part6.16">4.5.2</a>, <a href="#rfc.xref.Part6.17">4.6.9</a>, <a href="#rfc.xref.Part6.18">8.1</a>, <a href="#rfc.xref.Part6.19">9.1</a>, <a href="#Part6"><b>14.1</b></a><ul>
    50585053                        <li><em>Section 2.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.4">2.3.4</a></li>
    50595054                        <li><em>Section 2.3.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.11">4.4.1</a>, <a href="#rfc.xref.Part6.14">4.4.4</a>, <a href="#rfc.xref.Part6.15">4.5.1</a>, <a href="#rfc.xref.Part6.16">4.5.2</a>, <a href="#rfc.xref.Part6.17">4.6.9</a></li>
     
    50625057                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.8">3.3</a></li>
    50635058                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.12">4.4.4</a></li>
    5064                         <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.18">9.1</a></li>
    5065                         <li><em>Section 3.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.9">3.3</a>, <a href="#rfc.xref.Part6.19">10.1</a></li>
     5059                        <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.18">8.1</a></li>
     5060                        <li><em>Section 3.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.9">3.3</a>, <a href="#rfc.xref.Part6.19">9.1</a></li>
    50665061                        <li><em>Section 3.6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.13">4.4.4</a></li>
    50675062                     </ul>
    50685063                  </li>
    5069                   <li><em>Part7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.1">3.2</a>, <a href="#rfc.xref.Part7.2">3.2</a>, <a href="#rfc.xref.Part7.3">3.3</a>, <a href="#rfc.xref.Part7.4">3.3</a>, <a href="#rfc.xref.Part7.5">4.1</a>, <a href="#rfc.xref.Part7.6">4.1</a>, <a href="#rfc.xref.Part7.7">4.1</a>, <a href="#Part7"><b>15.1</b></a><ul>
     5064                  <li><em>Part7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.1">3.2</a>, <a href="#rfc.xref.Part7.2">3.2</a>, <a href="#rfc.xref.Part7.3">3.3</a>, <a href="#rfc.xref.Part7.4">3.3</a>, <a href="#rfc.xref.Part7.5">4.1</a>, <a href="#rfc.xref.Part7.6">4.1</a>, <a href="#rfc.xref.Part7.7">4.1</a>, <a href="#Part7"><b>14.1</b></a><ul>
    50705065                        <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.5">4.1</a></li>
    50715066                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.6">4.1</a></li>
     
    50775072                     </ul>
    50785073                  </li>
    5079                   <li>payload&nbsp;&nbsp;<a href="#rfc.iref.p.3">8</a></li>
    5080                   <li>POST method&nbsp;&nbsp;<a href="#rfc.iref.p.1"><b>2.3.4</b></a>, <a href="#rfc.xref.POST.1">12.1</a>, <a href="#rfc.xref.POST.2">C</a></li>
    5081                   <li>PUT method&nbsp;&nbsp;<a href="#rfc.iref.p.2"><b>2.3.5</b></a>, <a href="#rfc.xref.PUT.1">12.1</a>, <a href="#rfc.xref.PUT.2">C</a></li>
     5074                  <li>payload&nbsp;&nbsp;<a href="#rfc.iref.p.3">7</a></li>
     5075                  <li>POST method&nbsp;&nbsp;<a href="#rfc.iref.p.1"><b>2.3.4</b></a>, <a href="#rfc.xref.POST.1">11.1</a>, <a href="#rfc.xref.POST.2">C</a></li>
     5076                  <li>PUT method&nbsp;&nbsp;<a href="#rfc.iref.p.2"><b>2.3.5</b></a>, <a href="#rfc.xref.PUT.1">11.1</a>, <a href="#rfc.xref.PUT.2">C</a></li>
    50825077               </ul>
    50835078            </li>
    50845079            <li><a id="rfc.index.R" href="#rfc.index.R"><b>R</b></a><ul>
    5085                   <li>Referer header field&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">3.2</a>, <a href="#rfc.iref.r.2"><b>11.7</b></a>, <a href="#rfc.xref.header.referer.2">12.3</a>, <a href="#rfc.xref.header.referer.3">C</a></li>
    5086                   <li>representation&nbsp;&nbsp;<a href="#rfc.iref.r.1">9</a></li>
    5087                   <li>Retry-After header field&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">3.3</a>, <a href="#rfc.xref.header.retry-after.2">4.7.4</a>, <a href="#rfc.iref.r.3"><b>11.8</b></a>, <a href="#rfc.xref.header.retry-after.3">12.3</a></li>
    5088                   <li><em>RFC1123</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1123.1">6.1</a>, <a href="#rfc.xref.RFC1123.2">6.1</a>, <a href="#RFC1123"><b>15.2</b></a><ul>
     5080                  <li>Referer header field&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">3.2</a>, <a href="#rfc.iref.r.2"><b>10.7</b></a>, <a href="#rfc.xref.header.referer.2">11.3</a>, <a href="#rfc.xref.header.referer.3">C</a></li>
     5081                  <li>representation&nbsp;&nbsp;<a href="#rfc.iref.r.1">8</a></li>
     5082                  <li>Retry-After header field&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">3.3</a>, <a href="#rfc.xref.header.retry-after.2">4.7.4</a>, <a href="#rfc.iref.r.3"><b>10.8</b></a>, <a href="#rfc.xref.header.retry-after.3">11.3</a></li>
     5083                  <li><em>RFC1123</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1123.1">6.1</a>, <a href="#rfc.xref.RFC1123.2">6.1</a>, <a href="#RFC1123"><b>14.2</b></a><ul>
    50895084                        <li><em>Section 5.2.14</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1123.2">6.1</a></li>
    50905085                     </ul>
    50915086                  </li>
    5092                   <li><em>RFC1945</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1945.1">4.5</a>, <a href="#RFC1945"><b>15.2</b></a>, <a href="#rfc.xref.RFC1945.2">B</a><ul>
     5087                  <li><em>RFC1945</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1945.1">4.5</a>, <a href="#RFC1945"><b>14.2</b></a>, <a href="#rfc.xref.RFC1945.2">B</a><ul>
    50935088                        <li><em>Section 9.3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1945.1">4.5</a></li>
    50945089                     </ul>
    50955090                  </li>
    5096                   <li><em>RFC1950</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1950.1">12.4</a>, <a href="#RFC1950"><b>15.1</b></a></li>
    5097                   <li><em>RFC1951</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1951.1">12.4</a>, <a href="#RFC1951"><b>15.1</b></a></li>
    5098                   <li><em>RFC1952</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1952.1">12.4</a>, <a href="#RFC1952"><b>15.1</b></a></li>
    5099                   <li><em>RFC2045</em>&nbsp;&nbsp;<a href="#RFC2045"><b>15.1</b></a>, <a href="#rfc.xref.RFC2045.1">A</a>, <a href="#rfc.xref.RFC2045.2">A.1</a></li>
    5100                   <li><em>RFC2046</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2046.1">7.3</a>, <a href="#rfc.xref.RFC2046.2">7.3.2</a>, <a href="#rfc.xref.RFC2046.3">9.2</a>, <a href="#RFC2046"><b>15.1</b></a>, <a href="#rfc.xref.RFC2046.4">A.2</a><ul>
    5101                         <li><em>Section 4.5.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2046.3">9.2</a></li>
    5102                         <li><em>Section 5.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2046.2">7.3.2</a></li>
     5091                  <li><em>RFC1950</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1950.1">11.4</a>, <a href="#RFC1950"><b>14.1</b></a></li>
     5092                  <li><em>RFC1951</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1951.1">11.4</a>, <a href="#RFC1951"><b>14.1</b></a></li>
     5093                  <li><em>RFC1952</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC1952.1">11.4</a>, <a href="#RFC1952"><b>14.1</b></a></li>
     5094                  <li><em>RFC2045</em>&nbsp;&nbsp;<a href="#RFC2045"><b>14.1</b></a>, <a href="#rfc.xref.RFC2045.1">A</a>, <a href="#rfc.xref.RFC2045.2">A.1</a></li>
     5095                  <li><em>RFC2046</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2046.1">6.5</a>, <a href="#rfc.xref.RFC2046.2">6.5.2</a>, <a href="#rfc.xref.RFC2046.3">8.2</a>, <a href="#RFC2046"><b>14.1</b></a>, <a href="#rfc.xref.RFC2046.4">A.2</a><ul>
     5096                        <li><em>Section 4.5.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2046.3">8.2</a></li>
     5097                        <li><em>Section 5.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2046.2">6.5.2</a></li>
    51035098                     </ul>
    51045099                  </li>
    5105                   <li><em>RFC2049</em>&nbsp;&nbsp;<a href="#RFC2049"><b>15.2</b></a>, <a href="#rfc.xref.RFC2049.1">A.2</a><ul>
     5100                  <li><em>RFC2049</em>&nbsp;&nbsp;<a href="#RFC2049"><b>14.2</b></a>, <a href="#rfc.xref.RFC2049.1">A.2</a><ul>
    51065101                        <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2049.1">A.2</a></li>
    51075102                     </ul>
    51085103                  </li>
    5109                   <li><em>RFC2068</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2068.1">4.5</a>, <a href="#rfc.xref.RFC2068.2">4.5</a>, <a href="#RFC2068"><b>15.2</b></a>, <a href="#rfc.xref.RFC2068.3">B</a><ul>
     5104                  <li><em>RFC2068</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2068.1">4.5</a>, <a href="#rfc.xref.RFC2068.2">4.5</a>, <a href="#RFC2068"><b>14.2</b></a>, <a href="#rfc.xref.RFC2068.3">B</a><ul>
    51105105                        <li><em>Section 10.3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2068.2">4.5</a></li>
    51115106                        <li><em>Section 10.3.4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2068.1">4.5</a></li>
    51125107                     </ul>
    51135108                  </li>
    5114                   <li><em>RFC2076</em>&nbsp;&nbsp;<a href="#RFC2076"><b>15.2</b></a>, <a href="#rfc.xref.RFC2076.1">B</a></li>
    5115                   <li><em>RFC2119</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2119.1">1.2</a>, <a href="#RFC2119"><b>15.1</b></a></li>
    5116                   <li><em>RFC2277</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2277.1">7.1</a>, <a href="#RFC2277"><b>15.2</b></a></li>
    5117                   <li><em>RFC2295</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2295.1">10</a>, <a href="#RFC2295"><b>15.1</b></a></li>
    5118                   <li><em>RFC2388</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2388.1">7.3.2</a>, <a href="#RFC2388"><b>15.2</b></a></li>
    5119                   <li><em>RFC2557</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2557.1">11.17</a>, <a href="#RFC2557"><b>15.2</b></a>, <a href="#rfc.xref.RFC2557.2">A.7</a><ul>
    5120                         <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2557.1">11.17</a></li>
     5109                  <li><em>RFC2076</em>&nbsp;&nbsp;<a href="#RFC2076"><b>14.2</b></a>, <a href="#rfc.xref.RFC2076.1">B</a></li>
     5110                  <li><em>RFC2119</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2119.1">1.2</a>, <a href="#RFC2119"><b>14.1</b></a></li>
     5111                  <li><em>RFC2277</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2277.1">6.3</a>, <a href="#RFC2277"><b>14.2</b></a></li>
     5112                  <li><em>RFC2295</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2295.1">9</a>, <a href="#RFC2295"><b>14.1</b></a></li>
     5113                  <li><em>RFC2388</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2388.1">6.5.2</a>, <a href="#RFC2388"><b>14.2</b></a></li>
     5114                  <li><em>RFC2557</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2557.1">10.17</a>, <a href="#RFC2557"><b>14.2</b></a>, <a href="#rfc.xref.RFC2557.2">A.7</a><ul>
     5115                        <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2557.1">10.17</a></li>
    51215116                     </ul>
    51225117                  </li>
    5123                   <li><em>RFC2616</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2616.1">1</a>, <a href="#rfc.xref.RFC2616.2">4.5</a>, <a href="#rfc.xref.RFC2616.3">11.14</a>, <a href="#RFC2616"><b>15.2</b></a>, <a href="#rfc.xref.RFC2616.4">E.1</a><ul>
     5118                  <li><em>RFC2616</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2616.1">1</a>, <a href="#rfc.xref.RFC2616.2">4.5</a>, <a href="#rfc.xref.RFC2616.3">10.14</a>, <a href="#RFC2616"><b>14.2</b></a>, <a href="#rfc.xref.RFC2616.4">E.1</a><ul>
    51245119                        <li><em>Section 10.3.8</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2616.2">4.5</a></li>
    5125                         <li><em>Section 14.4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2616.3">11.14</a></li>
     5120                        <li><em>Section 14.4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2616.3">10.14</a></li>
    51265121                     </ul>
    51275122                  </li>
    5128                   <li><em>RFC2817</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2817.1">12.2</a>, <a href="#RFC2817"><b>15.2</b></a>, <a href="#rfc.xref.RFC2817.2">C</a>, <a href="#rfc.xref.RFC2817.3">C</a>, <a href="#rfc.xref.RFC2817.4">C</a><ul>
    5129                         <li><em>Section 7.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2817.1">12.2</a>, <a href="#rfc.xref.RFC2817.3">C</a></li>
     5123                  <li><em>RFC2817</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2817.1">11.2</a>, <a href="#RFC2817"><b>14.2</b></a>, <a href="#rfc.xref.RFC2817.2">C</a>, <a href="#rfc.xref.RFC2817.3">C</a>, <a href="#rfc.xref.RFC2817.4">C</a><ul>
     5124                        <li><em>Section 7.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC2817.1">11.2</a>, <a href="#rfc.xref.RFC2817.3">C</a></li>
    51305125                     </ul>
    51315126                  </li>
    5132                   <li><em>RFC3629</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3629.1">7.1</a>, <a href="#RFC3629"><b>15.2</b></a></li>
    5133                   <li><em>RFC3864</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3864.1">3.1</a>, <a href="#rfc.xref.RFC3864.2">3.1</a>, <a href="#rfc.xref.RFC3864.3">12.3</a>, <a href="#RFC3864"><b>15.2</b></a><ul>
     5127                  <li><em>RFC3629</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3629.1">6.3</a>, <a href="#RFC3629"><b>14.2</b></a></li>
     5128                  <li><em>RFC3864</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3864.1">3.1</a>, <a href="#rfc.xref.RFC3864.2">3.1</a>, <a href="#rfc.xref.RFC3864.3">11.3</a>, <a href="#RFC3864"><b>14.2</b></a><ul>
    51345129                        <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3864.2">3.1</a></li>
    51355130                     </ul>
    51365131                  </li>
    5137                   <li><em>RFC3986</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.1">11.5</a>, <a href="#rfc.xref.RFC3986.2">11.5</a>, <a href="#RFC3986"><b>15.1</b></a><ul>
    5138                         <li><em>Section 4.2</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.1">11.5</a></li>
    5139                         <li><em>Section 5</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.2">11.5</a></li>
     5132                  <li><em>RFC3986</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.1">10.5</a>, <a href="#rfc.xref.RFC3986.2">10.5</a>, <a href="#RFC3986"><b>14.1</b></a><ul>
     5133                        <li><em>Section 4.2</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.1">10.5</a></li>
     5134                        <li><em>Section 5</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3986.2">10.5</a></li>
    51405135                     </ul>
    51415136                  </li>
    5142                   <li><em>RFC4288</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4288.1">7.3</a>, <a href="#RFC4288"><b>15.1</b></a></li>
    5143                   <li><em>RFC4647</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.1">11.14</a>, <a href="#rfc.xref.RFC4647.2">11.14</a>, <a href="#rfc.xref.RFC4647.3">11.14</a>, <a href="#rfc.xref.RFC4647.4">11.14</a>, <a href="#RFC4647"><b>15.1</b></a><ul>
    5144                         <li><em>Section 2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.1">11.14</a></li>
    5145                         <li><em>Section 2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.2">11.14</a></li>
    5146                         <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.3">11.14</a></li>
    5147                         <li><em>Section 3.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.4">11.14</a></li>
     5137                  <li><em>RFC4288</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4288.1">6.5</a>, <a href="#RFC4288"><b>14.1</b></a></li>
     5138                  <li><em>RFC4647</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.1">10.14</a>, <a href="#rfc.xref.RFC4647.2">10.14</a>, <a href="#rfc.xref.RFC4647.3">10.14</a>, <a href="#rfc.xref.RFC4647.4">10.14</a>, <a href="#RFC4647"><b>14.1</b></a><ul>
     5139                        <li><em>Section 2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.1">10.14</a></li>
     5140                        <li><em>Section 2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.2">10.14</a></li>
     5141                        <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.3">10.14</a></li>
     5142                        <li><em>Section 3.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4647.4">10.14</a></li>
    51485143                     </ul>
    51495144                  </li>
    5150                   <li><em>RFC5226</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5226.1">2.2</a>, <a href="#rfc.xref.RFC5226.2">4.2</a>, <a href="#rfc.xref.RFC5226.3">7.2.1</a>, <a href="#RFC5226"><b>15.2</b></a><ul>
    5151                         <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5226.1">2.2</a>, <a href="#rfc.xref.RFC5226.2">4.2</a>, <a href="#rfc.xref.RFC5226.3">7.2.1</a></li>
     5145                  <li><em>RFC5226</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5226.1">2.2</a>, <a href="#rfc.xref.RFC5226.2">4.2</a>, <a href="#rfc.xref.RFC5226.3">6.4.1</a>, <a href="#RFC5226"><b>14.2</b></a><ul>
     5146                        <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5226.1">2.2</a>, <a href="#rfc.xref.RFC5226.2">4.2</a>, <a href="#rfc.xref.RFC5226.3">6.4.1</a></li>
    51525147                     </ul>
    51535148                  </li>
    5154                   <li><em>RFC5234</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.1">1.3</a>, <a href="#rfc.xref.RFC5234.2">1.3</a>, <a href="#rfc.xref.RFC5234.3">3.1</a>, <a href="#RFC5234"><b>15.1</b></a><ul>
     5149                  <li><em>RFC5234</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.1">1.3</a>, <a href="#rfc.xref.RFC5234.2">1.3</a>, <a href="#rfc.xref.RFC5234.3">3.1</a>, <a href="#RFC5234"><b>14.1</b></a><ul>
    51555150                        <li><em>Appendix B.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.2">1.3</a></li>
    51565151                     </ul>
    51575152                  </li>
    5158                   <li><em>RFC5322</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.1">6.1</a>, <a href="#rfc.xref.RFC5322.2">11.2</a>, <a href="#rfc.xref.RFC5322.3">11.4</a>, <a href="#rfc.xref.RFC5322.4">11.4</a>, <a href="#RFC5322"><b>15.2</b></a>, <a href="#rfc.xref.RFC5322.5">A</a><ul>
     5153                  <li><em>RFC5322</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.1">6.1</a>, <a href="#rfc.xref.RFC5322.2">10.2</a>, <a href="#rfc.xref.RFC5322.3">10.4</a>, <a href="#rfc.xref.RFC5322.4">10.4</a>, <a href="#RFC5322"><b>14.2</b></a>, <a href="#rfc.xref.RFC5322.5">A</a><ul>
    51595154                        <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.1">6.1</a></li>
    5160                         <li><em>Section 3.4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.3">11.4</a>, <a href="#rfc.xref.RFC5322.4">11.4</a></li>
    5161                         <li><em>Section 3.6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.2">11.2</a></li>
     5155                        <li><em>Section 3.4</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.3">10.4</a>, <a href="#rfc.xref.RFC5322.4">10.4</a></li>
     5156                        <li><em>Section 3.6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5322.2">10.2</a></li>
    51625157                     </ul>
    51635158                  </li>
    5164                   <li><em>RFC5646</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5646.1">7.4</a>, <a href="#rfc.xref.RFC5646.2">7.4</a>, <a href="#rfc.xref.RFC5646.3">7.4</a>, <a href="#RFC5646"><b>15.1</b></a><ul>
    5165                         <li><em>Section 2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5646.2">7.4</a></li>
     5159                  <li><em>RFC5646</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5646.1">6.6</a>, <a href="#rfc.xref.RFC5646.2">6.6</a>, <a href="#rfc.xref.RFC5646.3">6.6</a>, <a href="#RFC5646"><b>14.1</b></a><ul>
     5160                        <li><em>Section 2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5646.2">6.6</a></li>
    51665161                     </ul>
    51675162                  </li>
    5168                   <li><em>RFC5789</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5789.1">2.3.5</a>, <a href="#RFC5789"><b>15.2</b></a></li>
    5169                   <li><em>RFC5987</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5987.1">3.1</a>, <a href="#RFC5987"><b>15.2</b></a></li>
    5170                   <li><em>RFC6151</em>&nbsp;&nbsp;<a href="#RFC6151"><b>15.2</b></a>, <a href="#rfc.xref.RFC6151.1">C</a></li>
    5171                   <li><em>RFC6266</em>&nbsp;&nbsp;<a href="#RFC6266"><b>15.2</b></a>, <a href="#rfc.xref.RFC6266.1">B</a>, <a href="#rfc.xref.RFC6266.2">C</a></li>
     5163                  <li><em>RFC5789</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5789.1">2.3.5</a>, <a href="#RFC5789"><b>14.2</b></a></li>
     5164                  <li><em>RFC5987</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5987.1">3.1</a>, <a href="#RFC5987"><b>14.2</b></a></li>
     5165                  <li><em>RFC6151</em>&nbsp;&nbsp;<a href="#RFC6151"><b>14.2</b></a>, <a href="#rfc.xref.RFC6151.1">C</a></li>
     5166                  <li><em>RFC6266</em>&nbsp;&nbsp;<a href="#RFC6266"><b>14.2</b></a>, <a href="#rfc.xref.RFC6266.1">B</a>, <a href="#rfc.xref.RFC6266.2">C</a></li>
    51725167               </ul>
    51735168            </li>
     
    51755170                  <li>Safe Methods&nbsp;&nbsp;<a href="#rfc.iref.s.2"><b>2.1.1</b></a></li>
    51765171                  <li>selected representation&nbsp;&nbsp;<a href="#rfc.iref.s.1"><b>1.1</b></a></li>
    5177                   <li>Server header field&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">3.3</a>, <a href="#rfc.iref.s.39"><b>11.9</b></a>, <a href="#rfc.xref.header.server.2">12.3</a>, <a href="#rfc.xref.header.server.3">13.1</a>, <a href="#rfc.xref.header.server.4">C</a></li>
     5172                  <li>Server header field&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">3.3</a>, <a href="#rfc.iref.s.39"><b>10.9</b></a>, <a href="#rfc.xref.header.server.2">11.3</a>, <a href="#rfc.xref.header.server.3">12.1</a>, <a href="#rfc.xref.header.server.4">C</a></li>
    51785173                  <li>Status Codes&nbsp;&nbsp;
    51795174                     <ul>
    5180                         <li>100 Continue&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">4.1</a>, <a href="#rfc.iref.s.3"><b>4.3.1</b></a>, <a href="#rfc.xref.status.100.2">12.2</a></li>
    5181                         <li>101 Switching Protocols&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">4.1</a>, <a href="#rfc.iref.s.4"><b>4.3.2</b></a>, <a href="#rfc.xref.status.101.2">12.2</a></li>
    5182                         <li>200 OK&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">4.1</a>, <a href="#rfc.iref.s.5"><b>4.4.1</b></a>, <a href="#rfc.xref.status.200.2">12.2</a></li>
    5183                         <li>201 Created&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">4.1</a>, <a href="#rfc.iref.s.6"><b>4.4.2</b></a>, <a href="#rfc.xref.status.201.2">12.2</a></li>
    5184                         <li>202 Accepted&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">4.1</a>, <a href="#rfc.iref.s.7"><b>4.4.3</b></a>, <a href="#rfc.xref.status.202.2">12.2</a></li>
    5185                         <li>203 Non-Authoritative Information&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">4.1</a>, <a href="#rfc.iref.s.8"><b>4.4.4</b></a>, <a href="#rfc.xref.status.203.2">12.2</a>, <a href="#rfc.xref.status.203.3">C</a></li>
    5186                         <li>204 No Content&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">4.1</a>, <a href="#rfc.iref.s.9"><b>4.4.5</b></a>, <a href="#rfc.xref.status.204.2">12.2</a></li>
    5187                         <li>205 Reset Content&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">4.1</a>, <a href="#rfc.iref.s.10"><b>4.4.6</b></a>, <a href="#rfc.xref.status.205.2">12.2</a></li>
    5188                         <li>300 Multiple Choices&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">4.1</a>, <a href="#rfc.iref.s.11"><b>4.5.1</b></a>, <a href="#rfc.xref.status.300.2">12.2</a></li>
    5189                         <li>301 Moved Permanently&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">4.1</a>, <a href="#rfc.iref.s.12"><b>4.5.2</b></a>, <a href="#rfc.xref.status.301.2">12.2</a>, <a href="#rfc.xref.status.301.3">C</a></li>
    5190                         <li>302 Found&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">4.1</a>, <a href="#rfc.iref.s.13"><b>4.5.3</b></a>, <a href="#rfc.xref.status.302.2">12.2</a>, <a href="#rfc.xref.status.302.3">C</a></li>
    5191                         <li>303 See Other&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">4.1</a>, <a href="#rfc.iref.s.14"><b>4.5.4</b></a>, <a href="#rfc.xref.status.303.2">12.2</a></li>
    5192                         <li>305 Use Proxy&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">4.1</a>, <a href="#rfc.iref.s.15"><b>4.5.5</b></a>, <a href="#rfc.xref.status.305.2">12.2</a>, <a href="#rfc.xref.status.305.3">C</a></li>
    5193                         <li>306 (Unused)&nbsp;&nbsp;<a href="#rfc.iref.s.16"><b>4.5.6</b></a>, <a href="#rfc.xref.status.306.1">12.2</a></li>
    5194                         <li>307 Temporary Redirect&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">4.1</a>, <a href="#rfc.iref.s.17"><b>4.5.7</b></a>, <a href="#rfc.xref.status.307.2">12.2</a>, <a href="#rfc.xref.status.307.3">C</a></li>
    5195                         <li>400 Bad Request&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">4.1</a>, <a href="#rfc.iref.s.18"><b>4.6.1</b></a>, <a href="#rfc.xref.status.400.2">12.2</a></li>
    5196                         <li>402 Payment Required&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">4.1</a>, <a href="#rfc.iref.s.19"><b>4.6.2</b></a>, <a href="#rfc.xref.status.402.2">12.2</a></li>
    5197                         <li>403 Forbidden&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">4.1</a>, <a href="#rfc.iref.s.20"><b>4.6.3</b></a>, <a href="#rfc.xref.status.403.2">12.2</a></li>
    5198                         <li>404 Not Found&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">4.1</a>, <a href="#rfc.iref.s.21"><b>4.6.4</b></a>, <a href="#rfc.xref.status.404.2">12.2</a></li>
    5199                         <li>405 Method Not Allowed&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">4.1</a>, <a href="#rfc.iref.s.22"><b>4.6.5</b></a>, <a href="#rfc.xref.status.405.2">12.2</a></li>
    5200                         <li>406 Not Acceptable&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">4.1</a>, <a href="#rfc.iref.s.23"><b>4.6.6</b></a>, <a href="#rfc.xref.status.406.2">12.2</a></li>
    5201                         <li>408 Request Timeout&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">4.1</a>, <a href="#rfc.iref.s.24"><b>4.6.7</b></a>, <a href="#rfc.xref.status.408.2">12.2</a></li>
    5202                         <li>409 Conflict&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">4.1</a>, <a href="#rfc.iref.s.25"><b>4.6.8</b></a>, <a href="#rfc.xref.status.409.2">12.2</a></li>
    5203                         <li>410 Gone&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">4.1</a>, <a href="#rfc.iref.s.26"><b>4.6.9</b></a>, <a href="#rfc.xref.status.410.2">12.2</a></li>
    5204                         <li>411 Length Required&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">4.1</a>, <a href="#rfc.iref.s.27"><b>4.6.10</b></a>, <a href="#rfc.xref.status.411.2">12.2</a></li>
    5205                         <li>413 Request Representation Too Large&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">4.1</a>, <a href="#rfc.iref.s.28"><b>4.6.11</b></a>, <a href="#rfc.xref.status.413.2">12.2</a></li>
    5206                         <li>414 URI Too Long&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">4.1</a>, <a href="#rfc.iref.s.29"><b>4.6.12</b></a>, <a href="#rfc.xref.status.414.2">12.2</a></li>
    5207                         <li>415 Unsupported Media Type&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">4.1</a>, <a href="#rfc.iref.s.30"><b>4.6.13</b></a>, <a href="#rfc.xref.status.415.2">12.2</a></li>
    5208                         <li>417 Expectation Failed&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">4.1</a>, <a href="#rfc.iref.s.31"><b>4.6.14</b></a>, <a href="#rfc.xref.status.417.2">12.2</a></li>
    5209                         <li>426 Upgrade Required&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">4.1</a>, <a href="#rfc.iref.s.32"><b>4.6.15</b></a>, <a href="#rfc.xref.status.426.2">12.2</a>, <a href="#rfc.xref.status.426.3">C</a></li>
    5210                         <li>500 Internal Server Error&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">4.1</a>, <a href="#rfc.iref.s.33"><b>4.7.1</b></a>, <a href="#rfc.xref.status.500.2">12.2</a></li>
    5211                         <li>501 Not Implemented&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">4.1</a>, <a href="#rfc.iref.s.34"><b>4.7.2</b></a>, <a href="#rfc.xref.status.501.2">12.2</a></li>
    5212                         <li>502 Bad Gateway&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">4.1</a>, <a href="#rfc.iref.s.35"><b>4.7.3</b></a>, <a href="#rfc.xref.status.502.2">12.2</a></li>
    5213                         <li>503 Service Unavailable&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">4.1</a>, <a href="#rfc.iref.s.36"><b>4.7.4</b></a>, <a href="#rfc.xref.status.503.2">12.2</a></li>
    5214                         <li>504 Gateway Timeout&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">4.1</a>, <a href="#rfc.iref.s.37"><b>4.7.5</b></a>, <a href="#rfc.xref.status.504.2">12.2</a></li>
    5215                         <li>505 HTTP Version Not Supported&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">4.1</a>, <a href="#rfc.iref.s.38"><b>4.7.6</b></a>, <a href="#rfc.xref.status.505.2">12.2</a></li>
     5175                        <li>100 Continue&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">4.1</a>, <a href="#rfc.iref.s.3"><b>4.3.1</b></a>, <a href="#rfc.xref.status.100.2">11.2</a></li>
     5176                        <li>101 Switching Protocols&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">4.1</a>, <a href="#rfc.iref.s.4"><b>4.3.2</b></a>, <a href="#rfc.xref.status.101.2">11.2</a></li>
     5177                        <li>200 OK&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">4.1</a>, <a href="#rfc.iref.s.5"><b>4.4.1</b></a>, <a href="#rfc.xref.status.200.2">11.2</a></li>
     5178                        <li>201 Created&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">4.1</a>, <a href="#rfc.iref.s.6"><b>4.4.2</b></a>, <a href="#rfc.xref.status.201.2">11.2</a></li>
     5179                        <li>202 Accepted&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">4.1</a>, <a href="#rfc.iref.s.7"><b>4.4.3</b></a>, <a href="#rfc.xref.status.202.2">11.2</a></li>
     5180                        <li>203 Non-Authoritative Information&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">4.1</a>, <a href="#rfc.iref.s.8"><b>4.4.4</b></a>, <a href="#rfc.xref.status.203.2">11.2</a>, <a href="#rfc.xref.status.203.3">C</a></li>
     5181                        <li>204 No Content&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">4.1</a>, <a href="#rfc.iref.s.9"><b>4.4.5</b></a>, <a href="#rfc.xref.status.204.2">11.2</a></li>
     5182                        <li>205 Reset Content&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">4.1</a>, <a href="#rfc.iref.s.10"><b>4.4.6</b></a>, <a href="#rfc.xref.status.205.2">11.2</a></li>
     5183                        <li>300 Multiple Choices&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">4.1</a>, <a href="#rfc.iref.s.11"><b>4.5.1</b></a>, <a href="#rfc.xref.status.300.2">11.2</a></li>
     5184                        <li>301 Moved Permanently&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">4.1</a>, <a href="#rfc.iref.s.12"><b>4.5.2</b></a>, <a href="#rfc.xref.status.301.2">11.2</a>, <a href="#rfc.xref.status.301.3">C</a></li>
     5185                        <li>302 Found&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">4.1</a>, <a href="#rfc.iref.s.13"><b>4.5.3</b></a>, <a href="#rfc.xref.status.302.2">11.2</a>, <a href="#rfc.xref.status.302.3">C</a></li>
     5186                        <li>303 See Other&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">4.1</a>, <a href="#rfc.iref.s.14"><b>4.5.4</b></a>, <a href="#rfc.xref.status.303.2">11.2</a></li>
     5187                        <li>305 Use Proxy&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">4.1</a>, <a href="#rfc.iref.s.15"><b>4.5.5</b></a>, <a href="#rfc.xref.status.305.2">11.2</a>, <a href="#rfc.xref.status.305.3">C</a></li>
     5188                        <li>306 (Unused)&nbsp;&nbsp;<a href="#rfc.iref.s.16"><b>4.5.6</b></a>, <a href="#rfc.xref.status.306.1">11.2</a></li>
     5189                        <li>307 Temporary Redirect&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">4.1</a>, <a href="#rfc.iref.s.17"><b>4.5.7</b></a>, <a href="#rfc.xref.status.307.2">11.2</a>, <a href="#rfc.xref.status.307.3">C</a></li>
     5190                        <li>400 Bad Request&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">4.1</a>, <a href="#rfc.iref.s.18"><b>4.6.1</b></a>, <a href="#rfc.xref.status.400.2">11.2</a></li>
     5191                        <li>402 Payment Required&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">4.1</a>, <a href="#rfc.iref.s.19"><b>4.6.2</b></a>, <a href="#rfc.xref.status.402.2">11.2</a></li>
     5192                        <li>403 Forbidden&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">4.1</a>, <a href="#rfc.iref.s.20"><b>4.6.3</b></a>, <a href="#rfc.xref.status.403.2">11.2</a></li>
     5193                        <li>404 Not Found&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">4.1</a>, <a href="#rfc.iref.s.21"><b>4.6.4</b></a>, <a href="#rfc.xref.status.404.2">11.2</a></li>
     5194                        <li>405 Method Not Allowed&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">4.1</a>, <a href="#rfc.iref.s.22"><b>4.6.5</b></a>, <a href="#rfc.xref.status.405.2">11.2</a></li>
     5195                        <li>406 Not Acceptable&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">4.1</a>, <a href="#rfc.iref.s.23"><b>4.6.6</b></a>, <a href="#rfc.xref.status.406.2">11.2</a></li>
     5196                        <li>408 Request Timeout&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">4.1</a>, <a href="#rfc.iref.s.24"><b>4.6.7</b></a>, <a href="#rfc.xref.status.408.2">11.2</a></li>
     5197                        <li>409 Conflict&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">4.1</a>, <a href="#rfc.iref.s.25"><b>4.6.8</b></a>, <a href="#rfc.xref.status.409.2">11.2</a></li>
     5198                        <li>410 Gone&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">4.1</a>, <a href="#rfc.iref.s.26"><b>4.6.9</b></a>, <a href="#rfc.xref.status.410.2">11.2</a></li>
     5199                        <li>411 Length Required&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">4.1</a>, <a href="#rfc.iref.s.27"><b>4.6.10</b></a>, <a href="#rfc.xref.status.411.2">11.2</a></li>
     5200                        <li>413 Request Representation Too Large&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">4.1</a>, <a href="#rfc.iref.s.28"><b>4.6.11</b></a>, <a href="#rfc.xref.status.413.2">11.2</a></li>
     5201                        <li>414 URI Too Long&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">4.1</a>, <a href="#rfc.iref.s.29"><b>4.6.12</b></a>, <a href="#rfc.xref.status.414.2">11.2</a></li>
     5202                        <li>415 Unsupported Media Type&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">4.1</a>, <a href="#rfc.iref.s.30"><b>4.6.13</b></a>, <a href="#rfc.xref.status.415.2">11.2</a></li>
     5203                        <li>417 Expectation Failed&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">4.1</a>, <a href="#rfc.iref.s.31"><b>4.6.14</b></a>, <a href="#rfc.xref.status.417.2">11.2</a></li>
     5204                        <li>426 Upgrade Required&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">4.1</a>, <a href="#rfc.iref.s.32"><b>4.6.15</b></a>, <a href="#rfc.xref.status.426.2">11.2</a>, <a href="#rfc.xref.status.426.3">C</a></li>
     5205                        <li>500 Internal Server Error&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">4.1</a>, <a href="#rfc.iref.s.33"><b>4.7.1</b></a>, <a href="#rfc.xref.status.500.2">11.2</a></li>
     5206                        <li>501 Not Implemented&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">4.1</a>, <a href="#rfc.iref.s.34"><b>4.7.2</b></a>, <a href="#rfc.xref.status.501.2">11.2</a></li>
     5207                        <li>502 Bad Gateway&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">4.1</a>, <a href="#rfc.iref.s.35"><b>4.7.3</b></a>, <a href="#rfc.xref.status.502.2">11.2</a></li>
     5208                        <li>503 Service Unavailable&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">4.1</a>, <a href="#rfc.iref.s.36"><b>4.7.4</b></a>, <a href="#rfc.xref.status.503.2">11.2</a></li>
     5209                        <li>504 Gateway Timeout&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">4.1</a>, <a href="#rfc.iref.s.37"><b>4.7.5</b></a>, <a href="#rfc.xref.status.504.2">11.2</a></li>
     5210                        <li>505 HTTP Version Not Supported&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">4.1</a>, <a href="#rfc.iref.s.38"><b>4.7.6</b></a>, <a href="#rfc.xref.status.505.2">11.2</a></li>
    52165211                     </ul>
    52175212                  </li>
     
    52195214            </li>
    52205215            <li><a id="rfc.index.T" href="#rfc.index.T"><b>T</b></a><ul>
    5221                   <li>TRACE method&nbsp;&nbsp;<a href="#rfc.iref.t.1"><b>2.3.7</b></a>, <a href="#rfc.xref.TRACE.1">11.6</a>, <a href="#rfc.xref.TRACE.2">12.1</a>, <a href="#rfc.xref.TRACE.3">13.1</a></li>
     5216                  <li>TRACE method&nbsp;&nbsp;<a href="#rfc.iref.t.1"><b>2.3.7</b></a>, <a href="#rfc.xref.TRACE.1">10.6</a>, <a href="#rfc.xref.TRACE.2">11.1</a>, <a href="#rfc.xref.TRACE.3">12.1</a></li>
    52225217               </ul>
    52235218            </li>
    52245219            <li><a id="rfc.index.U" href="#rfc.index.U"><b>U</b></a><ul>
    5225                   <li>User-Agent header field&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.2</a>, <a href="#rfc.xref.header.user-agent.2">10.1</a>, <a href="#rfc.iref.u.1"><b>11.10</b></a>, <a href="#rfc.xref.header.user-agent.3">12.3</a>, <a href="#rfc.xref.header.user-agent.4">13.1</a></li>
     5220                  <li>User-Agent header field&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.2</a>, <a href="#rfc.xref.header.user-agent.2">9.1</a>, <a href="#rfc.iref.u.1"><b>10.10</b></a>, <a href="#rfc.xref.header.user-agent.3">11.3</a>, <a href="#rfc.xref.header.user-agent.4">12.1</a></li>
    52265221               </ul>
    52275222            </li>
  • draft-ietf-httpbis/experiment/p2-semantics.xml

    r1627 r1629  
    23252325</t>
    23262326</section>
    2327 </section>
    2328 
    2329 <section title="Protocol Parameters" anchor="protocol.parameters">
    23302327
    23312328<section title="Character Encodings (charset)" anchor="character.sets">
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