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Timestamp:
Jul 3, 2012, 11:26:11 AM (7 years ago)
Author:
julian.reschke@…
Message:

Work-in-progress: hyperlink status codes definitions (for those defined in parts 4, 5, and 7)

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1 edited

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

    r1707 r1708  
    13801380         Transfer-Encoding, Content-Length, etc.) only indicate what their values would have been if the request method had been GET.
    13811381         Successful (2xx) responses to CONNECT switch to tunnel mode instead of having a message body. All 1xx (Informational), 204
    1382          (No Content), and 304 (Not Modified) responses <em class="bcp14">MUST NOT</em> include a message body. All other responses do include a message body, although the body <em class="bcp14">MAY</em> be of zero length.
     1382         (No Content), and <a href="p4-conditional.html#status.304" class="smpl">304 (Not Modified)</a> responses <em class="bcp14">MUST NOT</em> include a message body. All other responses do include a message body, although the body <em class="bcp14">MAY</em> be of zero length. (See <a href="p2-semantics.html#status.codes" title="Status Codes">Section 4</a> of <a href="#Part2" id="rfc.xref.Part2.9"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> and <a href="p4-conditional.html#status.304" title="304 Not Modified">Section 4.1</a> of <a href="#Part4" id="rfc.xref.Part4.1"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>.)
    13831383      </p>
    13841384      <div id="rfc.iref.t.4"></div>
     
    14061406      <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.
    14071407      </p>
    1408       <p id="rfc.section.3.3.1.p.7">Unlike Content-Encoding (<a href="p2-semantics.html#content.codings" title="Content Codings">Section 5.4</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.
    1409       </p>
    1410       <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
    1411          indicate that the origin server would have applied a transfer coding to the message body if the request had been an unconditional
    1412          GET. This indication is not required, however, because any recipient on the response chain (including the origin server) can
    1413          remove transfer codings when they are not needed.
     1408      <p id="rfc.section.3.3.1.p.7">Unlike Content-Encoding (<a href="p2-semantics.html#content.codings" title="Content Codings">Section 5.4</a> of <a href="#Part2" id="rfc.xref.Part2.10"><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.
     1409      </p>
     1410      <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 <a href="p4-conditional.html#status.304" class="smpl">304 (Not Modified)</a> response (<a href="p4-conditional.html#status.304" title="304 Not Modified">Section 4.1</a> of <a href="#Part4" id="rfc.xref.Part4.2"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>) to a GET request, neither of which includes a message body, to indicate that the origin server would have applied a transfer
     1411         coding to the message body if the request had been an unconditional GET. This indication is not required, however, because
     1412         any recipient on the response chain (including the origin server) can remove transfer codings when they are not needed.
    14141413      </p>
    14151414      <p id="rfc.section.3.3.1.p.9">Transfer-Encoding was added in HTTP/1.1. It is generally assumed that implementations advertising only HTTP/1.0 support will
     
    14311430      <div id="rfc.figure.u.36"></div><pre class="text">  Content-Length: 3495
    14321431</pre><p id="rfc.section.3.3.2.p.5">In the case of a response to a HEAD request, Content-Length indicates the size of the payload body (without any potential
    1433          transfer-coding) that would have been sent had the request been a GET. In the case of a 304 (Not Modified) response to a GET
    1434          request, Content-Length indicates the size of the payload body (without any potential transfer-coding) that would have been
    1435          sent in a 200 (OK) response.
     1432         transfer-coding) that would have been sent had the request been a GET. In the case of a <a href="p4-conditional.html#status.304" class="smpl">304 (Not Modified)</a> response (<a href="p4-conditional.html#status.304" title="304 Not Modified">Section 4.1</a> of <a href="#Part4" id="rfc.xref.Part4.3"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>) to a GET request, Content-Length indicates the size of the payload body (without any potential transfer-coding) that would
     1433         have been sent in a 200 (OK) response.
    14361434      </p>
    14371435      <p id="rfc.section.3.3.2.p.6">HTTP's use of Content-Length is significantly different from how it is used in MIME, where it is an optional field used only
     
    17131711      </p>
    17141712      <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>
    1715       <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 8</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
     1713      <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 8</a> of <a href="#Part2" id="rfc.xref.Part2.11"><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
    17161714         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
    17171715         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.
     
    17551753      </p>
    17561754      <p id="rfc.section.5.1.p.2">HTTP communication is initiated by a user agent for some purpose. The purpose is a combination of request semantics, which
    1757          are defined in <a href="#Part2" id="rfc.xref.Part2.11"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, and a target resource upon which to apply those semantics. A URI reference (<a href="#uri" title="Uniform Resource Identifiers">Section&nbsp;2.7</a>) is typically used as an identifier for the "target resource", which a user agent would resolve to its absolute form in order
     1755         are defined in <a href="#Part2" id="rfc.xref.Part2.12"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, and a target resource upon which to apply those semantics. A URI reference (<a href="#uri" title="Uniform Resource Identifiers">Section&nbsp;2.7</a>) is typically used as an identifier for the "target resource", which a user agent would resolve to its absolute form in order
    17581756         to obtain the "target URI". The target URI excludes the reference's fragment identifier component, if any, since fragment
    17591757         identifiers are reserved for client-side processing (<a href="#RFC3986" id="rfc.xref.RFC3986.18"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-3.5">Section 3.5</a>).
     
    18141812      </p>
    18151813      <div id="authority-form">
    1816          <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,
     1814         <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.Part2.13"><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,
    18171815         </p>
    18181816      </div>
    18191817      <div id="rfc.figure.u.49"></div><pre class="text2">CONNECT www.example.com:80 HTTP/1.1
    18201818</pre><div id="asterisk-form">
    1821          <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,
     1819         <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.Part2.14"><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,
    18221820            the client <em class="bcp14">MUST</em> send only "*" (%x2A) as the request-target. For example,
    18231821         </p>
     
    19741972         </p>
    19751973      </div>
    1976       <p id="rfc.section.5.6.2.p.8">A non-transforming proxy <em class="bcp14">MUST</em> preserve the message payload (<a href="#Part2" id="rfc.xref.Part2.14"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>), though it <em class="bcp14">MAY</em> change the message body through application or removal of a transfer-coding (<a href="#transfer.codings" title="Transfer Codings">Section&nbsp;4</a>).
     1974      <p id="rfc.section.5.6.2.p.8">A non-transforming proxy <em class="bcp14">MUST</em> preserve the message payload (<a href="#Part2" id="rfc.xref.Part2.15"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>), though it <em class="bcp14">MAY</em> change the message body through application or removal of a transfer-coding (<a href="#transfer.codings" title="Transfer Codings">Section&nbsp;4</a>).
    19771975      </p>
    19781976      <h2 id="rfc.section.5.7"><a href="#rfc.section.5.7">5.7</a>&nbsp;<a id="associating.response.to.request" href="#associating.response.to.request">Associating a Response to a Request</a></h2>
     
    19801978         messages. Hence, it relies on the order of response arrival to correspond exactly to the order in which requests are made
    19811979         on the same connection. More than one response message per request only occurs when one or more informational responses (1xx,
    1982          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.
     1980         see <a href="p2-semantics.html#status.1xx" title="Informational 1xx">Section 4.3</a> of <a href="#Part2" id="rfc.xref.Part2.16"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) precede a final response to the same request.
    19831981      </p>
    19841982      <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.
     
    21282126      <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.
    21292127      </p>
    2130       <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
     2128      <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.Part2.17"><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
    21312129         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.
    21322130      </p>
     
    21582156      <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>
    21592157      <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
    2160          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
     2158         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.Part2.18"><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
    21612159         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.
    21622160      </p>
     
    21712169      </p>
    21722170      <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>
    2173       <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
     2171      <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.Part2.19"><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
    21742172         to accept the request (based on the request header fields) before the client sends the request body. In some cases, it might
    21752173         either be inappropriate or highly inefficient for the client to send the body if the server will reject the message without
     
    21782176      <p id="rfc.section.6.4.3.p.2">Requirements for HTTP/1.1 clients: </p>
    21792177      <ul>
    2180          <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 9.11</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.
    2181          </li>
    2182          <li>A client <em class="bcp14">MUST NOT</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="Expect">Section 9.11</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.
     2178         <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 9.11</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.
     2179         </li>
     2180         <li>A client <em class="bcp14">MUST NOT</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="Expect">Section 9.11</a> of <a href="#Part2" id="rfc.xref.Part2.21"><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.
    21832181         </li>
    21842182      </ul>
     
    22242222         <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
    22252223            an Expect header field with the "100-continue" expectation. This requirement overrides the general rule for forwarding of
    2226             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>).
     2224            1xx responses (see <a href="p2-semantics.html#status.1xx" title="Informational 1xx">Section 4.3</a> of <a href="#Part2" id="rfc.xref.Part2.22"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
    22272225         </li>
    22282226      </ul>
     
    22612259      </p>
    22622260      <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
    2263          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>).
     2261         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.Part2.23"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
    22642262      </p>
    22652263      <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
     
    25252523         <li>Pointer to specification text</li>
    25262524      </ul>
    2527       <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 5.4</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>.
     2525      <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 5.4</a> of <a href="#Part2" id="rfc.xref.Part2.24"><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>.
    25282526      </p>
    25292527      <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.
     
    26852683         that most implementations will choose substantially higher limits.
    26862684      </p>
    2687       <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>).
     2685      <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.Part2.25"><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.Part2.26"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>).
    26882686      </p>
    26892687      <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.
     
    27302728      <h2 id="rfc.references.1"><a href="#rfc.section.10.1" id="rfc.section.10.1">10.1</a> Normative References
    27312729      </h2>
    2732       <table>                   
     2730      <table>                     
    27332731         <tr>
    27342732            <td class="reference"><b id="ISO-8859-1">[ISO-8859-1]</b></td>
     
    27382736            <td class="reference"><b id="Part2">[Part2]</b></td>
    27392737            <td class="top"><a href="mailto:fielding@gbiv.com" title="Adobe Systems Incorporated">Fielding, R., Ed.</a>, <a href="mailto:ylafon@w3.org" title="World Wide Web Consortium">Lafon, Y., Ed.</a>, and <a href="mailto:julian.reschke@greenbytes.de" title="greenbytes GmbH">J. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p2-semantics-latest">HTTP/1.1, part 2: Message Semantics</a>”, Internet-Draft&nbsp;draft-ietf-httpbis-p2-semantics-latest (work in progress), July&nbsp;2012.
     2738            </td>
     2739         </tr>
     2740         <tr>
     2741            <td class="reference"><b id="Part4">[Part4]</b></td>
     2742            <td class="top"><a href="mailto:fielding@gbiv.com" title="Adobe Systems Incorporated">Fielding, R., Ed.</a>, <a href="mailto:ylafon@w3.org" title="World Wide Web Consortium">Lafon, Y., Ed.</a>, and <a href="mailto:julian.reschke@greenbytes.de" title="greenbytes GmbH">J. Reschke, Ed.</a>, “<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-latest">HTTP/1.1, part 4: Conditional Requests</a>”, Internet-Draft&nbsp;draft-ietf-httpbis-p4-conditional-latest (work in progress), July&nbsp;2012.
    27402743            </td>
    27412744         </tr>
     
    37423745            <li><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul>
    37433746                  <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>
    3744                   <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>
     3747                  <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</a>, <a href="#rfc.xref.Part2.10">3.3.1</a>, <a href="#rfc.xref.Part2.11">4.3.1</a>, <a href="#rfc.xref.Part2.12">5.1</a>, <a href="#rfc.xref.Part2.13">5.3</a>, <a href="#rfc.xref.Part2.14">5.3</a>, <a href="#rfc.xref.Part2.15">5.6.2</a>, <a href="#rfc.xref.Part2.16">5.7</a>, <a href="#rfc.xref.Part2.17">6.3.2.2</a>, <a href="#rfc.xref.Part2.18">6.3.4</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">6.4.3</a>, <a href="#rfc.xref.Part2.23">6.5</a>, <a href="#rfc.xref.Part2.24">7.4</a>, <a href="#rfc.xref.Part2.25">8.6</a>, <a href="#rfc.xref.Part2.26">8.6</a>, <a href="#Part2"><b>10.1</b></a><ul>
    37453748                        <li><em>Section 2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.4">3.1.1</a></li>
    3746                         <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>
    3747                         <li><em>Section 2.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.13">5.3</a></li>
    3748                         <li><em>Section 2.3.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.12">5.3</a></li>
     3749                        <li><em>Section 2.1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.17">6.3.2.2</a>, <a href="#rfc.xref.Part2.18">6.3.4</a></li>
     3750                        <li><em>Section 2.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.14">5.3</a></li>
     3751                        <li><em>Section 2.3.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.13">5.3</a></li>
    37493752                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.8">3.2</a></li>
    3750                         <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>
    3751                         <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>
    3752                         <li><em>Section 4.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.18">6.4.3</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>, <a href="#rfc.xref.Part2.9">3.3</a></li>
     3754                        <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.16">5.7</a>, <a href="#rfc.xref.Part2.22">6.4.3</a></li>
     3755                        <li><em>Section 4.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.19">6.4.3</a></li>
    37533756                        <li><em>Section 4.4.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.2">2.3</a></li>
    3754                         <li><em>Section 4.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.22">6.5</a></li>
    3755                         <li><em>Section 4.6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.25">8.6</a></li>
    3756                         <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>
    3757                         <li><em>Section 5.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.9">3.3.1</a>, <a href="#rfc.xref.Part2.23">7.4</a></li>
    3758                         <li><em>Section 8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.10">4.3.1</a></li>
     3757                        <li><em>Section 4.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.23">6.5</a></li>
     3758                        <li><em>Section 4.6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.26">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.Part2.25">8.6</a></li>
     3760                        <li><em>Section 5.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.10">3.3.1</a>, <a href="#rfc.xref.Part2.24">7.4</a></li>
     3761                        <li><em>Section 8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.11">4.3.1</a></li>
    37593762                        <li><em>Section 9.10</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.7">3.2</a></li>
    3760                         <li><em>Section 9.11</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>Section 9.11</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.20">6.4.3</a>, <a href="#rfc.xref.Part2.21">6.4.3</a></li>
    37613764                        <li><em>Appendix A</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">1</a></li>
     3765                     </ul>
     3766                  </li>
     3767                  <li><em>Part4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3.3</a>, <a href="#rfc.xref.Part4.2">3.3.1</a>, <a href="#rfc.xref.Part4.3">3.3.2</a>, <a href="#Part4"><b>10.1</b></a><ul>
     3768                        <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3.3</a>, <a href="#rfc.xref.Part4.2">3.3.1</a>, <a href="#rfc.xref.Part4.3">3.3.2</a></li>
    37623769                     </ul>
    37633770                  </li>
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