Ignore:
Timestamp:
Mar 11, 2011, 5:43:45 AM (9 years ago)
Author:
julian.reschke@…
Message:

remove unused ABNF imports (see #276)

File:
1 edited

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  • draft-ietf-httpbis/latest/p2-semantics.html

    r1165 r1167  
    741741      <div id="rfc.figure.u.2"></div><pre class="inline">  <a href="#abnf.dependencies" class="smpl">absolute-URI</a>  = &lt;absolute-URI, defined in <a href="#Part1" id="rfc.xref.Part1.9"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.6</a>&gt;
    742742  <a href="#abnf.dependencies" class="smpl">comment</a>       = &lt;comment, defined in <a href="#Part1" id="rfc.xref.Part1.10"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a>&gt;
    743   <a href="#abnf.dependencies" class="smpl">Host</a>          = &lt;Host, defined in <a href="#Part1" id="rfc.xref.Part1.11"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.6</a>&gt;
    744   <a href="#abnf.dependencies" class="smpl">HTTP-date</a>     = &lt;HTTP-date, defined in <a href="#Part1" id="rfc.xref.Part1.12"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#date.time.formats.full.date" title="Date/Time Formats: Full Date">Section 6.1</a>&gt;
    745   <a href="#abnf.dependencies" class="smpl">partial-URI</a>   = &lt;partial-URI, defined in <a href="#Part1" id="rfc.xref.Part1.13"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.6</a>&gt;
    746   <a href="#abnf.dependencies" class="smpl">product</a>       = &lt;product, defined in <a href="#Part1" id="rfc.xref.Part1.14"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 6.3</a>&gt;
    747   <a href="#abnf.dependencies" class="smpl">TE</a>            = &lt;TE, defined in <a href="#Part1" id="rfc.xref.Part1.15"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#header.te" title="TE">Section 9.5</a>&gt;
    748   <a href="#abnf.dependencies" class="smpl">URI-reference</a> = &lt;URI-reference, defined in <a href="#Part1" id="rfc.xref.Part1.16"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.6</a>&gt;
    749 </pre><div id="rfc.figure.u.3"></div><pre class="inline">  <a href="#abnf.dependencies" class="smpl">Accept</a>        = &lt;Accept, defined in <a href="#Part3" id="rfc.xref.Part3.1"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>, <a href="p3-payload.html#header.accept" title="Accept">Section 6.1</a>&gt;
    750   <a href="#abnf.dependencies" class="smpl">Accept-Charset</a> =
    751              &lt;Accept-Charset, defined in <a href="#Part3" id="rfc.xref.Part3.2"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>, <a href="p3-payload.html#header.accept-charset" title="Accept-Charset">Section 6.2</a>&gt;
    752   <a href="#abnf.dependencies" class="smpl">Accept-Encoding</a> =
    753              &lt;Accept-Encoding, defined in <a href="#Part3" id="rfc.xref.Part3.3"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>, <a href="p3-payload.html#header.accept-encoding" title="Accept-Encoding">Section 6.3</a>&gt;
    754   <a href="#abnf.dependencies" class="smpl">Accept-Language</a> =
    755              &lt;Accept-Language, defined in <a href="#Part3" id="rfc.xref.Part3.4"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>, <a href="p3-payload.html#header.accept-language" title="Accept-Language">Section 6.4</a>&gt;
    756 </pre><div id="rfc.figure.u.4"></div><pre class="inline">  <a href="#abnf.dependencies" class="smpl">ETag</a>          = &lt;ETag, defined in <a href="#Part4" id="rfc.xref.Part4.1"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>, <a href="p4-conditional.html#header.etag" title="ETag">Section 6.1</a>&gt;
    757   <a href="#abnf.dependencies" class="smpl">If-Match</a>      = &lt;If-Match, defined in <a href="#Part4" id="rfc.xref.Part4.2"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>, <a href="p4-conditional.html#header.if-match" title="If-Match">Section 6.2</a>&gt;
    758   <a href="#abnf.dependencies" class="smpl">If-Modified-Since</a> =
    759              &lt;If-Modified-Since, defined in <a href="#Part4" id="rfc.xref.Part4.3"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>, <a href="p4-conditional.html#header.if-modified-since" title="If-Modified-Since">Section 6.3</a>&gt;
    760   <a href="#abnf.dependencies" class="smpl">If-None-Match</a> = &lt;If-None-Match, defined in <a href="#Part4" id="rfc.xref.Part4.4"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>, <a href="p4-conditional.html#header.if-none-match" title="If-None-Match">Section 6.4</a>&gt;
    761   <a href="#abnf.dependencies" class="smpl">If-Unmodified-Since</a> =
    762              &lt;If-Unmodified-Since, defined in <a href="#Part4" id="rfc.xref.Part4.5"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>, <a href="p4-conditional.html#header.if-unmodified-since" title="If-Unmodified-Since">Section 6.5</a>&gt;
    763 </pre><div id="rfc.figure.u.5"></div><pre class="inline">  <a href="#abnf.dependencies" class="smpl">Accept-Ranges</a> = &lt;Accept-Ranges, defined in <a href="#Part5" id="rfc.xref.Part5.1"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>, <a href="p5-range.html#header.accept-ranges" title="Accept-Ranges">Section 5.1</a>&gt;
    764   <a href="#abnf.dependencies" class="smpl">If-Range</a>      = &lt;If-Range, defined in <a href="#Part5" id="rfc.xref.Part5.2"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>, <a href="p5-range.html#header.if-range" title="If-Range">Section 5.3</a>&gt;
    765   <a href="#abnf.dependencies" class="smpl">Range</a>         = &lt;Range, defined in <a href="#Part5" id="rfc.xref.Part5.3"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>, <a href="p5-range.html#header.range" title="Range">Section 5.4</a>&gt;
    766 </pre><div id="rfc.figure.u.6"></div><pre class="inline">  <a href="#abnf.dependencies" class="smpl">Age</a>           = &lt;Age, defined in <a href="#Part6" id="rfc.xref.Part6.1"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>, <a href="p6-cache.html#header.age" title="Age">Section 3.1</a>&gt;
    767   <a href="#abnf.dependencies" class="smpl">Vary</a>          = &lt;Vary, defined in <a href="#Part6" id="rfc.xref.Part6.2"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>, <a href="p6-cache.html#header.vary" title="Vary">Section 3.5</a>&gt;
    768 </pre><div id="rfc.figure.u.7"></div><pre class="inline">  <a href="#abnf.dependencies" class="smpl">Authorization</a> = &lt;Authorization, defined in <a href="#Part7" id="rfc.xref.Part7.1"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>, <a href="p7-auth.html#header.authorization" title="Authorization">Section 4.1</a>&gt;
    769   <a href="#abnf.dependencies" class="smpl">Proxy-Authenticate</a> =
    770              &lt;Proxy-Authenticate, defined in <a href="#Part7" id="rfc.xref.Part7.2"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>, <a href="p7-auth.html#header.proxy-authenticate" title="Proxy-Authenticate">Section 4.2</a>&gt;
    771   <a href="#abnf.dependencies" class="smpl">Proxy-Authorization</a> =
    772              &lt;Proxy-Authorization, defined in <a href="#Part7" id="rfc.xref.Part7.3"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>, <a href="p7-auth.html#header.proxy-authorization" title="Proxy-Authorization">Section 4.3</a>&gt;
    773   <a href="#abnf.dependencies" class="smpl">WWW-Authenticate</a> =
    774              &lt;WWW-Authenticate, defined in <a href="#Part7" id="rfc.xref.Part7.4"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>, <a href="p7-auth.html#header.www-authenticate" title="WWW-Authenticate">Section 4.4</a>&gt;
     743  <a href="#abnf.dependencies" class="smpl">HTTP-date</a>     = &lt;HTTP-date, defined in <a href="#Part1" id="rfc.xref.Part1.11"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#date.time.formats.full.date" title="Date/Time Formats: Full Date">Section 6.1</a>&gt;
     744  <a href="#abnf.dependencies" class="smpl">partial-URI</a>   = &lt;partial-URI, defined in <a href="#Part1" id="rfc.xref.Part1.12"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.6</a>&gt;
     745  <a href="#abnf.dependencies" class="smpl">product</a>       = &lt;product, defined in <a href="#Part1" id="rfc.xref.Part1.13"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 6.3</a>&gt;
     746  <a href="#abnf.dependencies" class="smpl">URI-reference</a> = &lt;URI-reference, defined in <a href="#Part1" id="rfc.xref.Part1.14"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, <a href="p1-messaging.html#uri" title="Uniform Resource Identifiers">Section 2.6</a>&gt;
    775747</pre><h1 id="rfc.section.2"><a href="#rfc.section.2">2.</a>&nbsp;<a id="method" href="#method">Method</a></h1>
    776       <p id="rfc.section.2.p.1">The Method token indicates the request method to be performed on the target resource (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.17"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). The method is case-sensitive.
    777       </p>
    778       <div id="rfc.figure.u.8"></div><pre class="inline"><span id="rfc.iref.g.1"></span>  <a href="#method" class="smpl">Method</a>         = <a href="#core.rules" class="smpl">token</a>
     748      <p id="rfc.section.2.p.1">The Method token indicates the request method to be performed on the target resource (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.15"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). The method is case-sensitive.
     749      </p>
     750      <div id="rfc.figure.u.3"></div><pre class="inline"><span id="rfc.iref.g.1"></span>  <a href="#method" class="smpl">Method</a>         = <a href="#core.rules" class="smpl">token</a>
    779751</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;9.1</a>). The status code of the response always notifies the client whether a method is currently allowed on a resource, since the
    780752         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
     
    853825         to a single application, so that this is clear.
    854826      </p>
    855       <p id="rfc.section.2.2.1.p.3">Due to the parsing rules defined in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.18"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, definitions of HTTP methods cannot prohibit the presence of a message-body on either the request or the response message
     827      <p id="rfc.section.2.2.1.p.3">Due to the parsing rules defined in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.16"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, definitions of HTTP methods cannot prohibit the presence of a message-body on either the request or the response message
    856828         (with responses to HEAD requests being the single exception). Definitions of new methods cannot change this rule, but they
    857829         can specify that only zero-length bodies (as opposed to absent bodies) are allowed.
    858830      </p>
    859       <p id="rfc.section.2.2.1.p.4">New method definitions need to indicate whether they are safe (<a href="#safe.methods" title="Safe Methods">Section&nbsp;7.1.1</a>) and whether they are idempotent (<a href="#idempotent.methods" title="Idempotent Methods">Section&nbsp;7.1.2</a>). They also need to state whether they can be cached (<a href="#Part6" id="rfc.xref.Part6.3"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>); in particular what conditions a cache may store the response, and under what conditions such a stored response may be used
     831      <p id="rfc.section.2.2.1.p.4">New method definitions need to indicate whether they are safe (<a href="#safe.methods" title="Safe Methods">Section&nbsp;7.1.1</a>) and whether they are idempotent (<a href="#idempotent.methods" title="Idempotent Methods">Section&nbsp;7.1.2</a>). They also need to state whether they can be cached (<a href="#Part6" id="rfc.xref.Part6.1"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>); in particular what conditions a cache may store the response, and under what conditions such a stored response may be used
    860832         to satisfy a subsequent request.
    861833      </p>
     
    876848               <tr>
    877849                  <td class="left">Accept</td>
    878                   <td class="left"><a href="p3-payload.html#header.accept" title="Accept">Section 6.1</a> of <a href="#Part3" id="rfc.xref.Part3.5"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a></td>
     850                  <td class="left"><a href="p3-payload.html#header.accept" title="Accept">Section 6.1</a> of <a href="#Part3" id="rfc.xref.Part3.1"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a></td>
    879851               </tr>
    880852               <tr>
    881853                  <td class="left">Accept-Charset</td>
    882                   <td class="left"><a href="p3-payload.html#header.accept-charset" title="Accept-Charset">Section 6.2</a> of <a href="#Part3" id="rfc.xref.Part3.6"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a></td>
     854                  <td class="left"><a href="p3-payload.html#header.accept-charset" title="Accept-Charset">Section 6.2</a> of <a href="#Part3" id="rfc.xref.Part3.2"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a></td>
    883855               </tr>
    884856               <tr>
    885857                  <td class="left">Accept-Encoding</td>
    886                   <td class="left"><a href="p3-payload.html#header.accept-encoding" title="Accept-Encoding">Section 6.3</a> of <a href="#Part3" id="rfc.xref.Part3.7"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a></td>
     858                  <td class="left"><a href="p3-payload.html#header.accept-encoding" title="Accept-Encoding">Section 6.3</a> of <a href="#Part3" id="rfc.xref.Part3.3"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a></td>
    887859               </tr>
    888860               <tr>
    889861                  <td class="left">Accept-Language</td>
    890                   <td class="left"><a href="p3-payload.html#header.accept-language" title="Accept-Language">Section 6.4</a> of <a href="#Part3" id="rfc.xref.Part3.8"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a></td>
     862                  <td class="left"><a href="p3-payload.html#header.accept-language" title="Accept-Language">Section 6.4</a> of <a href="#Part3" id="rfc.xref.Part3.4"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a></td>
    891863               </tr>
    892864               <tr>
    893865                  <td class="left">Authorization</td>
    894                   <td class="left"><a href="p7-auth.html#header.authorization" title="Authorization">Section 4.1</a> of <a href="#Part7" id="rfc.xref.Part7.5"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
     866                  <td class="left"><a href="p7-auth.html#header.authorization" title="Authorization">Section 4.1</a> of <a href="#Part7" id="rfc.xref.Part7.1"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
    895867               </tr>
    896868               <tr>
     
    904876               <tr>
    905877                  <td class="left">Host</td>
    906                   <td class="left"><a href="p1-messaging.html#header.host" title="Host">Section 9.4</a> of <a href="#Part1" id="rfc.xref.Part1.19"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a></td>
     878                  <td class="left"><a href="p1-messaging.html#header.host" title="Host">Section 9.4</a> of <a href="#Part1" id="rfc.xref.Part1.17"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a></td>
    907879               </tr>
    908880               <tr>
    909881                  <td class="left">If-Match</td>
    910                   <td class="left"><a href="p4-conditional.html#header.if-match" title="If-Match">Section 6.2</a> of <a href="#Part4" id="rfc.xref.Part4.6"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
     882                  <td class="left"><a href="p4-conditional.html#header.if-match" title="If-Match">Section 6.2</a> of <a href="#Part4" id="rfc.xref.Part4.1"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
    911883               </tr>
    912884               <tr>
    913885                  <td class="left">If-Modified-Since</td>
    914                   <td class="left"><a href="p4-conditional.html#header.if-modified-since" title="If-Modified-Since">Section 6.3</a> of <a href="#Part4" id="rfc.xref.Part4.7"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
     886                  <td class="left"><a href="p4-conditional.html#header.if-modified-since" title="If-Modified-Since">Section 6.3</a> of <a href="#Part4" id="rfc.xref.Part4.2"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
    915887               </tr>
    916888               <tr>
    917889                  <td class="left">If-None-Match</td>
    918                   <td class="left"><a href="p4-conditional.html#header.if-none-match" title="If-None-Match">Section 6.4</a> of <a href="#Part4" id="rfc.xref.Part4.8"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
     890                  <td class="left"><a href="p4-conditional.html#header.if-none-match" title="If-None-Match">Section 6.4</a> of <a href="#Part4" id="rfc.xref.Part4.3"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
    919891               </tr>
    920892               <tr>
    921893                  <td class="left">If-Range</td>
    922                   <td class="left"><a href="p5-range.html#header.if-range" title="If-Range">Section 5.3</a> of <a href="#Part5" id="rfc.xref.Part5.4"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
     894                  <td class="left"><a href="p5-range.html#header.if-range" title="If-Range">Section 5.3</a> of <a href="#Part5" id="rfc.xref.Part5.1"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
    923895               </tr>
    924896               <tr>
    925897                  <td class="left">If-Unmodified-Since</td>
    926                   <td class="left"><a href="p4-conditional.html#header.if-unmodified-since" title="If-Unmodified-Since">Section 6.5</a> of <a href="#Part4" id="rfc.xref.Part4.9"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
     898                  <td class="left"><a href="p4-conditional.html#header.if-unmodified-since" title="If-Unmodified-Since">Section 6.5</a> of <a href="#Part4" id="rfc.xref.Part4.4"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
    927899               </tr>
    928900               <tr>
     
    932904               <tr>
    933905                  <td class="left">Proxy-Authorization</td>
    934                   <td class="left"><a href="p7-auth.html#header.proxy-authorization" title="Proxy-Authorization">Section 4.3</a> of <a href="#Part7" id="rfc.xref.Part7.6"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
     906                  <td class="left"><a href="p7-auth.html#header.proxy-authorization" title="Proxy-Authorization">Section 4.3</a> of <a href="#Part7" id="rfc.xref.Part7.2"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
    935907               </tr>
    936908               <tr>
    937909                  <td class="left">Range</td>
    938                   <td class="left"><a href="p5-range.html#header.range" title="Range">Section 5.4</a> of <a href="#Part5" id="rfc.xref.Part5.5"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
     910                  <td class="left"><a href="p5-range.html#header.range" title="Range">Section 5.4</a> of <a href="#Part5" id="rfc.xref.Part5.2"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
    939911               </tr>
    940912               <tr>
     
    944916               <tr>
    945917                  <td class="left">TE</td>
    946                   <td class="left"><a href="p1-messaging.html#header.te" title="TE">Section 9.5</a> of <a href="#Part1" id="rfc.xref.Part1.20"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a></td>
     918                  <td class="left"><a href="p1-messaging.html#header.te" title="TE">Section 9.5</a> of <a href="#Part1" id="rfc.xref.Part1.18"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a></td>
    947919               </tr>
    948920               <tr>
     
    958930         client does not need to examine or display the Reason-Phrase.
    959931      </p>
    960       <div id="rfc.figure.u.9"></div><pre class="inline"><span id="rfc.iref.g.2"></span><span id="rfc.iref.g.3"></span><span id="rfc.iref.g.4"></span>  <a href="#status.code.and.reason.phrase" class="smpl">Status-Code</a>    = 3<a href="#notation" class="smpl">DIGIT</a>
     932      <div id="rfc.figure.u.4"></div><pre class="inline"><span id="rfc.iref.g.2"></span><span id="rfc.iref.g.3"></span><span id="rfc.iref.g.4"></span>  <a href="#status.code.and.reason.phrase" class="smpl">Status-Code</a>    = 3<a href="#notation" class="smpl">DIGIT</a>
    961933  <a href="#status.code.and.reason.phrase" class="smpl">Reason-Phrase</a>  = *( <a href="#notation" class="smpl">WSP</a> / <a href="#notation" class="smpl">VCHAR</a> / <a href="#core.rules" class="smpl">obs-text</a> )
    962934</pre><p id="rfc.section.4.p.4">HTTP status codes are extensible. HTTP applications are not required to understand the meaning of all registered status codes,
     
    967939      </p>
    968940      <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>
    969       <p id="rfc.section.4.1.p.1">The status codes listed below are defined in <a href="#status.codes" title="Status Code Definitions">Section&nbsp;8</a> of this specification, <a href="p4-conditional.html#status.code.definitions" title="Status Code Definitions">Section 3</a> of <a href="#Part4" id="rfc.xref.Part4.10"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>, <a href="p5-range.html#status.code.definitions" title="Status Code Definitions">Section 3</a> of <a href="#Part5" id="rfc.xref.Part5.6"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>, and <a href="p7-auth.html#status.code.definitions" title="Status Code Definitions">Section 3</a> of <a href="#Part7" id="rfc.xref.Part7.7"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>. The reason phrases listed here are only recommendations — they can be replaced by local equivalents without affecting the
     941      <p id="rfc.section.4.1.p.1">The status codes listed below are defined in <a href="#status.codes" title="Status Code Definitions">Section&nbsp;8</a> of this specification, <a href="p4-conditional.html#status.code.definitions" title="Status Code Definitions">Section 3</a> of <a href="#Part4" id="rfc.xref.Part4.5"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>, <a href="p5-range.html#status.code.definitions" title="Status Code Definitions">Section 3</a> of <a href="#Part5" id="rfc.xref.Part5.3"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>, and <a href="p7-auth.html#status.code.definitions" title="Status Code Definitions">Section 3</a> of <a href="#Part7" id="rfc.xref.Part7.3"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>. The reason phrases listed here are only recommendations — they can be replaced by local equivalents without affecting the
    970942         protocol.
    971943      </p>
     
    1023995                  <td class="left">206</td>
    1024996                  <td class="left">Partial Content</td>
    1025                   <td class="left"><a href="p5-range.html#status.206" title="206 Partial Content">Section 3.1</a> of <a href="#Part5" id="rfc.xref.Part5.7"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
     997                  <td class="left"><a href="p5-range.html#status.206" title="206 Partial Content">Section 3.1</a> of <a href="#Part5" id="rfc.xref.Part5.4"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
    1026998               </tr>
    1027999               <tr>
     
    10481020                  <td class="left">304</td>
    10491021                  <td class="left">Not Modified</td>
    1050                   <td class="left"><a href="p4-conditional.html#status.304" title="304 Not Modified">Section 3.1</a> of <a href="#Part4" id="rfc.xref.Part4.11"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
     1022                  <td class="left"><a href="p4-conditional.html#status.304" title="304 Not Modified">Section 3.1</a> of <a href="#Part4" id="rfc.xref.Part4.6"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
    10511023               </tr>
    10521024               <tr>
     
    10681040                  <td class="left">401</td>
    10691041                  <td class="left">Unauthorized</td>
    1070                   <td class="left"><a href="p7-auth.html#status.401" title="401 Unauthorized">Section 3.1</a> of <a href="#Part7" id="rfc.xref.Part7.8"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
     1042                  <td class="left"><a href="p7-auth.html#status.401" title="401 Unauthorized">Section 3.1</a> of <a href="#Part7" id="rfc.xref.Part7.4"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
    10711043               </tr>
    10721044               <tr>
     
    10981070                  <td class="left">407</td>
    10991071                  <td class="left">Proxy Authentication Required</td>
    1100                   <td class="left"><a href="p7-auth.html#status.407" title="407 Proxy Authentication Required">Section 3.2</a> of <a href="#Part7" id="rfc.xref.Part7.9"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
     1072                  <td class="left"><a href="p7-auth.html#status.407" title="407 Proxy Authentication Required">Section 3.2</a> of <a href="#Part7" id="rfc.xref.Part7.5"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
    11011073               </tr>
    11021074               <tr>
     
    11231095                  <td class="left">412</td>
    11241096                  <td class="left">Precondition Failed</td>
    1125                   <td class="left"><a href="p4-conditional.html#status.412" title="412 Precondition Failed">Section 3.2</a> of <a href="#Part4" id="rfc.xref.Part4.12"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
     1097                  <td class="left"><a href="p4-conditional.html#status.412" title="412 Precondition Failed">Section 3.2</a> of <a href="#Part4" id="rfc.xref.Part4.7"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
    11261098               </tr>
    11271099               <tr>
     
    11431115                  <td class="left">416</td>
    11441116                  <td class="left">Requested range not satisfiable</td>
    1145                   <td class="left"><a href="p5-range.html#status.416" title="416 Requested Range Not Satisfiable">Section 3.2</a> of <a href="#Part5" id="rfc.xref.Part5.8"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
     1117                  <td class="left"><a href="p5-range.html#status.416" title="416 Requested Range Not Satisfiable">Section 3.2</a> of <a href="#Part5" id="rfc.xref.Part5.5"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
    11461118               </tr>
    11471119               <tr>
     
    12101182         a zero-length response body. They can require the presence of one or more particular HTTP response header(s).
    12111183      </p>
    1212       <p id="rfc.section.4.2.1.p.5">Likewise, their definitions can specify that caches are allowed to use heuristics to determine their freshness (see <a href="#Part6" id="rfc.xref.Part6.4"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>; by default, it is not allowed), and can define how to determine the resource which they carry a representation for (see <a href="#identifying.response.associated.with.representation" title="Identifying the Resource Associated with a Representation">Section&nbsp;6.1</a>; by default, it is anonymous).
     1184      <p id="rfc.section.4.2.1.p.5">Likewise, their definitions can specify that caches are allowed to use heuristics to determine their freshness (see <a href="#Part6" id="rfc.xref.Part6.2"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>; by default, it is not allowed), and can define how to determine the resource which they carry a representation for (see <a href="#identifying.response.associated.with.representation" title="Identifying the Resource Associated with a Representation">Section&nbsp;6.1</a>; by default, it is anonymous).
    12131185      </p>
    12141186      <h1 id="rfc.section.5"><a href="#rfc.section.5">5.</a>&nbsp;<a id="response.header.fields" href="#response.header.fields">Response Header Fields</a></h1>
    12151187      <p id="rfc.section.5.p.1">The response header fields allow the server to pass additional information about the response which cannot be placed in the
    1216          Status-Line. These header fields give information about the server and about further access to the target resource (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.21"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     1188         Status-Line. These header fields give information about the server and about further access to the target resource (<a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.19"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    12171189      </p>
    12181190      <div id="rfc.table.u.4">
     
    12271199               <tr>
    12281200                  <td class="left">Accept-Ranges</td>
    1229                   <td class="left"><a href="p5-range.html#header.accept-ranges" title="Accept-Ranges">Section 5.1</a> of <a href="#Part5" id="rfc.xref.Part5.9"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
     1201                  <td class="left"><a href="p5-range.html#header.accept-ranges" title="Accept-Ranges">Section 5.1</a> of <a href="#Part5" id="rfc.xref.Part5.6"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a></td>
    12301202               </tr>
    12311203               <tr>
    12321204                  <td class="left">Age</td>
    1233                   <td class="left"><a href="p6-cache.html#header.age" title="Age">Section 3.1</a> of <a href="#Part6" id="rfc.xref.Part6.5"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a></td>
     1205                  <td class="left"><a href="p6-cache.html#header.age" title="Age">Section 3.1</a> of <a href="#Part6" id="rfc.xref.Part6.3"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a></td>
    12341206               </tr>
    12351207               <tr>
     
    12391211               <tr>
    12401212                  <td class="left">ETag</td>
    1241                   <td class="left"><a href="p4-conditional.html#header.etag" title="ETag">Section 6.1</a> of <a href="#Part4" id="rfc.xref.Part4.13"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
     1213                  <td class="left"><a href="p4-conditional.html#header.etag" title="ETag">Section 6.1</a> of <a href="#Part4" id="rfc.xref.Part4.8"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a></td>
    12421214               </tr>
    12431215               <tr>
     
    12471219               <tr>
    12481220                  <td class="left">Proxy-Authenticate</td>
    1249                   <td class="left"><a href="p7-auth.html#header.proxy-authenticate" title="Proxy-Authenticate">Section 4.2</a> of <a href="#Part7" id="rfc.xref.Part7.10"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
     1221                  <td class="left"><a href="p7-auth.html#header.proxy-authenticate" title="Proxy-Authenticate">Section 4.2</a> of <a href="#Part7" id="rfc.xref.Part7.6"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
    12501222               </tr>
    12511223               <tr>
     
    12591231               <tr>
    12601232                  <td class="left">Vary</td>
    1261                   <td class="left"><a href="p6-cache.html#header.vary" title="Vary">Section 3.5</a> of <a href="#Part6" id="rfc.xref.Part6.6"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a></td>
     1233                  <td class="left"><a href="p6-cache.html#header.vary" title="Vary">Section 3.5</a> of <a href="#Part6" id="rfc.xref.Part6.4"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a></td>
    12621234               </tr>
    12631235               <tr>
    12641236                  <td class="left">WWW-Authenticate</td>
    1265                   <td class="left"><a href="p7-auth.html#header.www-authenticate" title="WWW-Authenticate">Section 4.4</a> of <a href="#Part7" id="rfc.xref.Part7.11"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
     1237                  <td class="left"><a href="p7-auth.html#header.www-authenticate" title="WWW-Authenticate">Section 4.4</a> of <a href="#Part7" id="rfc.xref.Part7.7"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a></td>
    12661238               </tr>
    12671239            </tbody>
     
    12711243      <p id="rfc.section.6.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
    12721244         of metadata (representation header fields) and data (representation body). When a complete or partial representation is enclosed
    1273          in an HTTP message, it is referred to as the payload of the message. HTTP representations are defined in <a href="#Part3" id="rfc.xref.Part3.9"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>.
    1274       </p>
    1275       <p id="rfc.section.6.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.Part1.22"><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
     1245         in an HTTP message, it is referred to as the payload of the message. HTTP representations are defined in <a href="#Part3" id="rfc.xref.Part3.5"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>.
     1246      </p>
     1247      <p id="rfc.section.6.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.Part1.20"><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
    12761248         to ensure safe and proper transfer of the message.
    12771249      </p>
     
    12791251      <p id="rfc.section.6.1.p.1">It is sometimes necessary to determine an identifier for the resource associated with a representation.</p>
    12801252      <p id="rfc.section.6.1.p.2">An HTTP request representation, when present, is always associated with an anonymous (i.e., unidentified) resource.</p>
    1281       <p id="rfc.section.6.1.p.3">In the common case, an HTTP response is a representation of the target resource (see <a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.23"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). However, this is not always the case. To determine the URI of the resource a response is associated with, the following
     1253      <p id="rfc.section.6.1.p.3">In the common case, an HTTP response is a representation of the target resource (see <a href="p1-messaging.html#effective.request.uri" title="Effective Request URI">Section 4.3</a> of <a href="#Part1" id="rfc.xref.Part1.21"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). However, this is not always the case. To determine the URI of the resource a response is associated with, the following
    12821254         rules are used (with the first applicable one being selected):
    12831255      </p>
     
    12871259         </li>
    12881260         <li>If the response status code is 204, 206, or 304 and the request method was GET or HEAD, the response payload is a partial
    1289             representation of the target resource (see <a href="p6-cache.html#combining.responses" title="Combining Responses">Section 2.8</a> of <a href="#Part6" id="rfc.xref.Part6.7"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
     1261            representation of the target resource (see <a href="p6-cache.html#combining.responses" title="Combining Responses">Section 2.8</a> of <a href="#Part6" id="rfc.xref.Part6.5"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
    12901262         </li>
    12911263         <li>If the response has a Content-Location header field, and that URI is the same as the effective request URI, the response payload
     
    13651337      </p>
    13661338      <p id="rfc.section.7.3.p.4">The semantics of the GET method change to a "partial GET" if the request message includes a Range header field. A partial
    1367          GET requests that only part of the representation be transferred, as described in <a href="p5-range.html#header.range" title="Range">Section 5.4</a> of <a href="#Part5" id="rfc.xref.Part5.10"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>. The partial GET request is intended to reduce unnecessary network usage by allowing partially-retrieved representations
     1339         GET requests that only part of the representation be transferred, as described in <a href="p5-range.html#header.range" title="Range">Section 5.4</a> of <a href="#Part5" id="rfc.xref.Part5.7"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>. The partial GET request is intended to reduce unnecessary network usage by allowing partially-retrieved representations
    13681340         to be completed without transferring data already held by the client.
    13691341      </p>
    1370       <p id="rfc.section.7.3.p.5">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.Part6.8"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
     1342      <p id="rfc.section.7.3.p.5">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.Part6.6"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
    13711343      </p>
    13721344      <p id="rfc.section.7.3.p.6">See <a href="#encoding.sensitive.information.in.uris" title="Encoding Sensitive Information in URIs">Section&nbsp;11.2</a> for security considerations when used for forms.
     
    13791351         hypertext links for validity, accessibility, and recent modification.
    13801352      </p>
    1381       <p id="rfc.section.7.4.p.2">The response to a HEAD request is cacheable and <em class="bcp14">MAY</em> be used to satisfy a subsequent HEAD request; see <a href="#Part6" id="rfc.xref.Part6.9"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>. It also <em class="bcp14">MAY</em> be used to update a previously cached representation from that resource; if the new field values indicate that the cached
     1353      <p id="rfc.section.7.4.p.2">The response to a HEAD request is cacheable and <em class="bcp14">MAY</em> be used to satisfy a subsequent HEAD request; see <a href="#Part6" id="rfc.xref.Part6.7"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>. It also <em class="bcp14">MAY</em> be used to update a previously cached representation from that resource; if the new field values indicate that the cached
    13821354         representation differs from the current representation (as would be indicated by a change in Content-Length, Content-MD5,
    13831355         ETag or Last-Modified), then the cache <em class="bcp14">MUST</em> treat the cache entry as stale.
     
    14051377         a Location header field (see <a href="#header.location" id="rfc.xref.header.location.2" title="Location">Section&nbsp;9.4</a>).
    14061378      </p>
    1407       <p id="rfc.section.7.5.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.Part6.10"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>). A cached POST response with a Content-Location header field (see <a href="p3-payload.html#header.content-location" title="Content-Location">Section 6.7</a> of <a href="#Part3" id="rfc.xref.Part3.10"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>) whose value is the effective Request URI <em class="bcp14">MAY</em> be used to satisfy subsequent GET and HEAD requests.
     1379      <p id="rfc.section.7.5.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.Part6.8"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>). A cached POST response with a Content-Location header field (see <a href="p3-payload.html#header.content-location" title="Content-Location">Section 6.7</a> of <a href="#Part3" id="rfc.xref.Part3.6"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>) whose value is the effective Request URI <em class="bcp14">MAY</em> be used to satisfy subsequent GET and HEAD requests.
    14081380      </p>
    14091381      <p id="rfc.section.7.5.p.6">Note that POST caching is not widely implemented. However, the 303 (See Other) response can be used to direct the user agent
     
    14681440      </p>
    14691441      <p id="rfc.section.7.6.p.11">Responses to the PUT method are not cacheable. If a PUT request passes through a cache that has one or more stored responses
    1470          for the effective request URI, those stored responses will be invalidated (see <a href="p6-cache.html#invalidation.after.updates.or.deletions" title="Request Methods that Invalidate">Section 2.5</a> of <a href="#Part6" id="rfc.xref.Part6.11"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
     1442         for the effective request URI, those stored responses will be invalidated (see <a href="p6-cache.html#invalidation.after.updates.or.deletions" title="Request Methods that Invalidate">Section 2.5</a> of <a href="#Part6" id="rfc.xref.Part6.9"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
    14711443      </p>
    14721444      <div id="rfc.iref.d.1"></div>
     
    14821454      </p>
    14831455      <p id="rfc.section.7.7.p.3">Responses to the DELETE method are not cacheable. If a DELETE request passes through a cache that has one or more stored responses
    1484          for the effective request URI, those stored responses will be invalidated (see <a href="p6-cache.html#invalidation.after.updates.or.deletions" title="Request Methods that Invalidate">Section 2.5</a> of <a href="#Part6" id="rfc.xref.Part6.12"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
     1456         for the effective request URI, those stored responses will be invalidated (see <a href="p6-cache.html#invalidation.after.updates.or.deletions" title="Request Methods that Invalidate">Section 2.5</a> of <a href="#Part6" id="rfc.xref.Part6.10"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>).
    14851457      </p>
    14861458      <h2 id="rfc.section.7.8"><a href="#rfc.section.7.8">7.8</a>&nbsp;<a id="TRACE" href="#TRACE">TRACE</a></h2>
     
    14911463      </p>
    14921464      <p id="rfc.section.7.8.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
    1493          or diagnostic information. The value of the Via header field (<a href="p1-messaging.html#header.via" title="Via">Section 9.9</a> of <a href="#Part1" id="rfc.xref.Part1.24"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) is of particular interest, since it acts as a trace of the request chain. Use of the Max-Forwards header field allows the
     1465         or diagnostic information. The value of the Via header field (<a href="p1-messaging.html#header.via" title="Via">Section 9.9</a> of <a href="#Part1" id="rfc.xref.Part1.22"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) is of particular interest, since it acts as a trace of the request chain. Use of the Max-Forwards header field allows the
    14941466         client to limit the length of the request chain, which is useful for testing a chain of proxies forwarding messages in an
    14951467         infinite loop.
    14961468      </p>
    1497       <p id="rfc.section.7.8.p.3">If the request is valid, the response <em class="bcp14">SHOULD</em> have a Content-Type of "message/http" (see <a href="p1-messaging.html#internet.media.type.message.http" title="Internet Media Type message/http">Section 10.3.1</a> of <a href="#Part1" id="rfc.xref.Part1.25"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and contain a message-body that encloses a copy of the entire request message. Responses to the TRACE method are not cacheable.
     1469      <p id="rfc.section.7.8.p.3">If the request is valid, the response <em class="bcp14">SHOULD</em> have a Content-Type of "message/http" (see <a href="p1-messaging.html#internet.media.type.message.http" title="Internet Media Type message/http">Section 10.3.1</a> of <a href="#Part1" id="rfc.xref.Part1.23"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and contain a message-body that encloses a copy of the entire request message. Responses to the TRACE method are not cacheable.
    14981470      </p>
    14991471      <div id="rfc.iref.c.1"></div>
     
    15031475         forwarding of packets until the connection is closed.
    15041476      </p>
    1505       <p id="rfc.section.7.9.p.2">When using CONNECT, the request-target <em class="bcp14">MUST</em> use the authority form (<a href="p1-messaging.html#request-target" title="request-target">Section 4.1.2</a> of <a href="#Part1" id="rfc.xref.Part1.26"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>); i.e., the request-target consists of only the host name and port number of the tunnel destination, separated by a colon.
     1477      <p id="rfc.section.7.9.p.2">When using CONNECT, the request-target <em class="bcp14">MUST</em> use the authority form (<a href="p1-messaging.html#request-target" title="request-target">Section 4.1.2</a> of <a href="#Part1" id="rfc.xref.Part1.24"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>); i.e., the request-target consists of only the host name and port number of the tunnel destination, separated by a colon.
    15061478         For example,
    15071479      </p>
    1508       <div id="rfc.figure.u.10"></div><pre class="text2">CONNECT server.example.com:80 HTTP/1.1
     1480      <div id="rfc.figure.u.5"></div><pre class="text2">CONNECT server.example.com:80 HTTP/1.1
    15091481Host: server.example.com:80
    15101482
     
    15131485      </p>
    15141486      <p id="rfc.section.7.9.p.5">For example, proxy authentication might be used to establish the authority to create a tunnel:</p>
    1515       <div id="rfc.figure.u.11"></div><pre class="text2">CONNECT server.example.com:80 HTTP/1.1
     1487      <div id="rfc.figure.u.6"></div><pre class="text2">CONNECT server.example.com:80 HTTP/1.1
    15161488Host: server.example.com:80
    15171489Proxy-Authorization: basic aGVsbG86d29ybGQ=
     
    15541526      <p id="rfc.section.8.1.1.p.1">The client <em class="bcp14">SHOULD</em> continue with its request. This interim response is used to inform the client that the initial part of the request has been
    15551527         received and has not yet been rejected by the server. The client <em class="bcp14">SHOULD</em> continue by sending the remainder of the request or, if the request has already been completed, ignore this response. The
    1556          server <em class="bcp14">MUST</em> send a final response after the request has been completed. See <a href="p1-messaging.html#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section 7.2.3</a> of <a href="#Part1" id="rfc.xref.Part1.27"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for detailed discussion of the use and handling of this status code.
     1528         server <em class="bcp14">MUST</em> send a final response after the request has been completed. See <a href="p1-messaging.html#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section 7.2.3</a> of <a href="#Part1" id="rfc.xref.Part1.25"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for detailed discussion of the use and handling of this status code.
    15571529      </p>
    15581530      <div id="rfc.iref.23"></div>
    15591531      <div id="rfc.iref.s.3"></div>
    15601532      <h3 id="rfc.section.8.1.2"><a href="#rfc.section.8.1.2">8.1.2</a>&nbsp;<a id="status.101" href="#status.101">101 Switching Protocols</a></h3>
    1561       <p id="rfc.section.8.1.2.p.1">The server understands and is willing to comply with the client's request, via the Upgrade message header field (<a href="p1-messaging.html#header.upgrade" title="Upgrade">Section 9.8</a> of <a href="#Part1" id="rfc.xref.Part1.28"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>), for a change in the application protocol being used on this connection. The server will switch protocols to those defined
     1533      <p id="rfc.section.8.1.2.p.1">The server understands and is willing to comply with the client's request, via the Upgrade message header field (<a href="p1-messaging.html#header.upgrade" title="Upgrade">Section 9.8</a> of <a href="#Part1" id="rfc.xref.Part1.26"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>), for a change in the application protocol being used on this connection. The server will switch protocols to those defined
    15621534         by the response's Upgrade header field immediately after the empty line which terminates the 101 response.
    15631535      </p>
     
    15821554         <dd>a representation containing the request message as received by the end server.</dd>
    15831555      </dl>
    1584       <p id="rfc.section.8.2.1.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.13"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 200 responses.
     1556      <p id="rfc.section.8.2.1.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.11"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 200 responses.
    15851557      </p>
    15861558      <div id="rfc.iref.25"></div>
     
    15941566      </p>
    15951567      <p id="rfc.section.8.2.2.p.2">A 201 response <em class="bcp14">MAY</em> contain an ETag response header field indicating the current value of the entity-tag for the representation of the resource
    1596          just created (see <a href="p4-conditional.html#header.etag" title="ETag">Section 6.1</a> of <a href="#Part4" id="rfc.xref.Part4.14"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>).
     1568         just created (see <a href="p4-conditional.html#header.etag" title="ETag">Section 6.1</a> of <a href="#Part4" id="rfc.xref.Part4.9"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>).
    15971569      </p>
    15981570      <div id="rfc.iref.26"></div>
     
    16161588         when the response would otherwise be 200 (OK).
    16171589      </p>
    1618       <p id="rfc.section.8.2.4.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.14"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 203 responses.
     1590      <p id="rfc.section.8.2.4.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.12"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 203 responses.
    16191591      </p>
    16201592      <div id="rfc.iref.28"></div>
     
    16391611         another input action.
    16401612      </p>
    1641       <p id="rfc.section.8.2.6.p.2">The message-body included with the response <em class="bcp14">MUST</em> be empty. Note that receivers still need to parse the response according to the algorithm defined in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.29"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>.
     1613      <p id="rfc.section.8.2.6.p.2">The message-body included with the response <em class="bcp14">MUST</em> be empty. Note that receivers still need to parse the response according to the algorithm defined in <a href="p1-messaging.html#message.body" title="Message Body">Section 3.3</a> of <a href="#Part1" id="rfc.xref.Part1.27"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>.
    16421614      </p>
    16431615      <div id="rfc.iref.30"></div>
     
    16451617      <h3 id="rfc.section.8.2.7"><a href="#rfc.section.8.2.7">8.2.7</a>&nbsp;<a id="status.206" href="#status.206">206 Partial Content</a></h3>
    16461618      <p id="rfc.section.8.2.7.p.1">The server has fulfilled the partial GET request for the resource and the enclosed payload is a partial representation as
    1647          defined in <a href="p5-range.html#status.206" title="206 Partial Content">Section 3.1</a> of <a href="#Part5" id="rfc.xref.Part5.11"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>.
    1648       </p>
    1649       <p id="rfc.section.8.2.7.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.15"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 206 responses.
     1619         defined in <a href="p5-range.html#status.206" title="206 Partial Content">Section 3.1</a> of <a href="#Part5" id="rfc.xref.Part5.8"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>.
     1620      </p>
     1621      <p id="rfc.section.8.2.7.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.13"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 206 responses.
    16501622      </p>
    16511623      <h2 id="rfc.section.8.3"><a href="#rfc.section.8.3">8.3</a>&nbsp;<a id="status.3xx" href="#status.3xx">Redirection 3xx</a></h2>
     
    16621634      <h3 id="rfc.section.8.3.1"><a href="#rfc.section.8.3.1">8.3.1</a>&nbsp;<a id="status.300" href="#status.300">300 Multiple Choices</a></h3>
    16631635      <p id="rfc.section.8.3.1.p.1">The target resource has more than one representation, each with its own specific location, and agent-driven negotiation information
    1664          (<a href="p3-payload.html#content.negotiation" title="Content Negotiation">Section 5</a> of <a href="#Part3" id="rfc.xref.Part3.11"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>) is being provided so that the user (or user agent) can select a preferred representation by redirecting its request to that
     1636         (<a href="p3-payload.html#content.negotiation" title="Content Negotiation">Section 5</a> of <a href="#Part3" id="rfc.xref.Part3.7"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>) is being provided so that the user (or user agent) can select a preferred representation by redirecting its request to that
    16651637         location.
    16661638      </p>
     
    16711643      <p id="rfc.section.8.3.1.p.3">If the server has a preferred choice of representation, it <em class="bcp14">SHOULD</em> include the specific URI for that representation in the Location field; user agents <em class="bcp14">MAY</em> use the Location field value for automatic redirection.
    16721644      </p>
    1673       <p id="rfc.section.8.3.1.p.4">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.16"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 300 responses.
     1645      <p id="rfc.section.8.3.1.p.4">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.14"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 300 responses.
    16741646      </p>
    16751647      <div id="rfc.iref.32"></div>
     
    16791651         request URI to one or more of the new references returned by the server, where possible.
    16801652      </p>
    1681       <p id="rfc.section.8.3.2.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.17"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 301 responses.
     1653      <p id="rfc.section.8.3.2.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.15"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 301 responses.
    16821654      </p>
    16831655      <p id="rfc.section.8.3.2.p.3">The new permanent URI <em class="bcp14">SHOULD</em> be given by the Location field in the response. Unless the request method was HEAD, the representation of the response <em class="bcp14">SHOULD</em> contain a short hypertext note with a hyperlink to the new URI(s).
     
    17311703      <h3 id="rfc.section.8.3.5"><a href="#rfc.section.8.3.5">8.3.5</a>&nbsp;<a id="status.304" href="#status.304">304 Not Modified</a></h3>
    17321704      <p id="rfc.section.8.3.5.p.1">The response to the request has not been modified since the conditions indicated by the client's conditional GET request,
    1733          as defined in <a href="p4-conditional.html#status.304" title="304 Not Modified">Section 3.1</a> of <a href="#Part4" id="rfc.xref.Part4.15"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>.
     1705         as defined in <a href="p4-conditional.html#status.304" title="304 Not Modified">Section 3.1</a> of <a href="#Part4" id="rfc.xref.Part4.10"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>.
    17341706      </p>
    17351707      <div id="rfc.iref.36"></div>
     
    17711743      <div id="rfc.iref.s.20"></div>
    17721744      <h3 id="rfc.section.8.4.2"><a href="#rfc.section.8.4.2">8.4.2</a>&nbsp;<a id="status.401" href="#status.401">401 Unauthorized</a></h3>
    1773       <p id="rfc.section.8.4.2.p.1">The request requires user authentication (see <a href="p7-auth.html#status.401" title="401 Unauthorized">Section 3.1</a> of <a href="#Part7" id="rfc.xref.Part7.12"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>).
     1745      <p id="rfc.section.8.4.2.p.1">The request requires user authentication (see <a href="p7-auth.html#status.401" title="401 Unauthorized">Section 3.1</a> of <a href="#Part7" id="rfc.xref.Part7.8"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>).
    17741746      </p>
    17751747      <div id="rfc.iref.41"></div>
     
    18181790      <div id="rfc.iref.s.26"></div>
    18191791      <h3 id="rfc.section.8.4.8"><a href="#rfc.section.8.4.8">8.4.8</a>&nbsp;<a id="status.407" href="#status.407">407 Proxy Authentication Required</a></h3>
    1820       <p id="rfc.section.8.4.8.p.1">This code is similar to 401 (Unauthorized), but indicates that the client must first authenticate itself with the proxy (see <a href="p7-auth.html#status.407" title="407 Proxy Authentication Required">Section 3.2</a> of <a href="#Part7" id="rfc.xref.Part7.13"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>).
     1792      <p id="rfc.section.8.4.8.p.1">This code is similar to 401 (Unauthorized), but indicates that the client must first authenticate itself with the proxy (see <a href="p7-auth.html#status.407" title="407 Proxy Authentication Required">Section 3.2</a> of <a href="#Part7" id="rfc.xref.Part7.9"><cite title="HTTP/1.1, part 7: Authentication">[Part7]</cite></a>).
    18211793      </p>
    18221794      <div id="rfc.iref.47"></div>
     
    18511823         — that is left to the discretion of the server owner.
    18521824      </p>
    1853       <p id="rfc.section.8.4.11.p.3">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.18"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 410 responses.
     1825      <p id="rfc.section.8.4.11.p.3">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 2.3.1.1</a> of <a href="#Part6" id="rfc.xref.Part6.16"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>) to determine freshness for 410 responses.
    18541826      </p>
    18551827      <div id="rfc.iref.50"></div>
     
    18631835      <h3 id="rfc.section.8.4.13"><a href="#rfc.section.8.4.13">8.4.13</a>&nbsp;<a id="status.412" href="#status.412">412 Precondition Failed</a></h3>
    18641836      <p id="rfc.section.8.4.13.p.1">The precondition given in one or more of the header fields evaluated to false when it was tested on the server, as defined
    1865          in <a href="p4-conditional.html#status.412" title="412 Precondition Failed">Section 3.2</a> of <a href="#Part4" id="rfc.xref.Part4.16"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>.
     1837         in <a href="p4-conditional.html#status.412" title="412 Precondition Failed">Section 3.2</a> of <a href="#Part4" id="rfc.xref.Part4.11"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>.
    18661838      </p>
    18671839      <div id="rfc.iref.52"></div>
     
    18911863      <div id="rfc.iref.s.35"></div>
    18921864      <h3 id="rfc.section.8.4.17"><a href="#rfc.section.8.4.17">8.4.17</a>&nbsp;<a id="status.416" href="#status.416">416 Requested Range Not Satisfiable</a></h3>
    1893       <p id="rfc.section.8.4.17.p.1">The request included a Range header field (<a href="p5-range.html#header.range" title="Range">Section 5.4</a> of <a href="#Part5" id="rfc.xref.Part5.12"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>) and none of the range-specifier values in this field overlap the current extent of the selected resource. See <a href="p5-range.html#status.416" title="416 Requested Range Not Satisfiable">Section 3.2</a> of <a href="#Part5" id="rfc.xref.Part5.13"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>.
     1865      <p id="rfc.section.8.4.17.p.1">The request included a Range header field (<a href="p5-range.html#header.range" title="Range">Section 5.4</a> of <a href="#Part5" id="rfc.xref.Part5.9"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>) and none of the range-specifier values in this field overlap the current extent of the selected resource. See <a href="p5-range.html#status.416" title="416 Requested Range Not Satisfiable">Section 3.2</a> of <a href="#Part5" id="rfc.xref.Part5.10"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>.
    18941866      </p>
    18951867      <div id="rfc.iref.56"></div>
     
    19021874      <div id="rfc.iref.s.37"></div>
    19031875      <h3 id="rfc.section.8.4.19"><a href="#rfc.section.8.4.19">8.4.19</a>&nbsp;<a id="status.426" href="#status.426">426 Upgrade Required</a></h3>
    1904       <p id="rfc.section.8.4.19.p.1">The request can not be completed without a prior protocol upgrade. This response <em class="bcp14">MUST</em> include an Upgrade header field (<a href="p1-messaging.html#header.upgrade" title="Upgrade">Section 9.8</a> of <a href="#Part1" id="rfc.xref.Part1.30"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) specifying the required protocols.
    1905       </p>
    1906       <div id="rfc.figure.u.12"></div>
     1876      <p id="rfc.section.8.4.19.p.1">The request can not be completed without a prior protocol upgrade. This response <em class="bcp14">MUST</em> include an Upgrade header field (<a href="p1-messaging.html#header.upgrade" title="Upgrade">Section 9.8</a> of <a href="#Part1" id="rfc.xref.Part1.28"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) specifying the required protocols.
     1877      </p>
     1878      <div id="rfc.figure.u.7"></div>
    19071879      <p>Example:</p>  <pre class="text2">HTTP/1.1 426 Upgrade Required
    19081880Upgrade: HTTP/2.0
     
    19591931      <p id="rfc.section.8.5.6.p.1">The server does not support, or refuses to support, the protocol version that was used in the request message. The server
    19601932         is indicating that it is unable or unwilling to complete the request using the same major version as the client, as described
    1961          in <a href="p1-messaging.html#http.version" title="Protocol Versioning">Section 2.5</a> of <a href="#Part1" id="rfc.xref.Part1.31"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, other than with this error message. The response <em class="bcp14">SHOULD</em> contain a representation describing why that version is not supported and what other protocols are supported by that server.
     1933         in <a href="p1-messaging.html#http.version" title="Protocol Versioning">Section 2.5</a> of <a href="#Part1" id="rfc.xref.Part1.29"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>, other than with this error message. The response <em class="bcp14">SHOULD</em> contain a representation describing why that version is not supported and what other protocols are supported by that server.
    19621934      </p>
    19631935      <h1 id="rfc.section.9"><a href="#rfc.section.9">9.</a>&nbsp;<a id="header.fields" href="#header.fields">Header Field Definitions</a></h1>
     
    19691941         is strictly to inform the recipient of valid request methods associated with the resource.
    19701942      </p>
    1971       <div id="rfc.figure.u.13"></div><pre class="inline"><span id="rfc.iref.g.6"></span><span id="rfc.iref.g.7"></span>  <a href="#header.allow" class="smpl">Allow</a>   = "Allow" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.allow" class="smpl">Allow-v</a>
     1943      <div id="rfc.figure.u.8"></div><pre class="inline"><span id="rfc.iref.g.6"></span><span id="rfc.iref.g.7"></span>  <a href="#header.allow" class="smpl">Allow</a>   = "Allow" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.allow" class="smpl">Allow-v</a>
    19721944  <a href="#header.allow" class="smpl">Allow-v</a> = #<a href="#method" class="smpl">Method</a>
    19731945</pre><p id="rfc.section.9.1.p.3">Example of use:</p>
    1974       <div id="rfc.figure.u.14"></div><pre class="text">  Allow: GET, HEAD, PUT
     1946      <div id="rfc.figure.u.9"></div><pre class="text">  Allow: GET, HEAD, PUT
    19751947</pre><p id="rfc.section.9.1.p.5">The actual set of allowed methods is defined by the origin server at the time of each request.</p>
    19761948      <p id="rfc.section.9.1.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
     
    19811953      <h2 id="rfc.section.9.2"><a href="#rfc.section.9.2">9.2</a>&nbsp;<a id="header.expect" href="#header.expect">Expect</a></h2>
    19821954      <p id="rfc.section.9.2.p.1">The "Expect" header field is used to indicate that particular server behaviors are required by the client.</p>
    1983       <div id="rfc.figure.u.15"></div><pre class="inline"><span id="rfc.iref.g.8"></span><span id="rfc.iref.g.9"></span><span id="rfc.iref.g.10"></span><span id="rfc.iref.g.11"></span><span id="rfc.iref.g.12"></span>  <a href="#header.expect" class="smpl">Expect</a>       = "Expect" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.expect" class="smpl">Expect-v</a>
     1955      <div id="rfc.figure.u.10"></div><pre class="inline"><span id="rfc.iref.g.8"></span><span id="rfc.iref.g.9"></span><span id="rfc.iref.g.10"></span><span id="rfc.iref.g.11"></span><span id="rfc.iref.g.12"></span>  <a href="#header.expect" class="smpl">Expect</a>       = "Expect" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.expect" class="smpl">Expect-v</a>
    19841956  <a href="#header.expect" class="smpl">Expect-v</a>     = 1#<a href="#header.expect" class="smpl">expectation</a>
    19851957 
     
    20011973      </p>
    20021974      <p id="rfc.section.9.2.p.7">Many older HTTP/1.0 and HTTP/1.1 applications do not understand the Expect header field.</p>
    2003       <p id="rfc.section.9.2.p.8">See <a href="p1-messaging.html#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section 7.2.3</a> of <a href="#Part1" id="rfc.xref.Part1.32"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for the use of the 100 (Continue) status code.
     1975      <p id="rfc.section.9.2.p.8">See <a href="p1-messaging.html#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section 7.2.3</a> of <a href="#Part1" id="rfc.xref.Part1.30"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for the use of the 100 (Continue) status code.
    20041976      </p>
    20051977      <div id="rfc.iref.f.1"></div>
     
    20081980      <p id="rfc.section.9.3.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.RFC5322.1"><cite title="Internet Message Format">[RFC5322]</cite></a>:
    20091981      </p>
    2010       <div id="rfc.figure.u.16"></div><pre class="inline"><span id="rfc.iref.g.13"></span><span id="rfc.iref.g.14"></span>  <a href="#header.from" class="smpl">From</a>    = "From" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.from" class="smpl">From-v</a>
     1982      <div id="rfc.figure.u.11"></div><pre class="inline"><span id="rfc.iref.g.13"></span><span id="rfc.iref.g.14"></span>  <a href="#header.from" class="smpl">From</a>    = "From" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.from" class="smpl">From-v</a>
    20111983  <a href="#header.from" class="smpl">From-v</a>  = <a href="#header.from" class="smpl">mailbox</a>
    20121984 
    20131985  <a href="#header.from" class="smpl">mailbox</a> = &lt;mailbox, defined in <a href="#RFC5322" id="rfc.xref.RFC5322.2"><cite title="Internet Message Format">[RFC5322]</cite></a>, <a href="http://tools.ietf.org/html/rfc5322#section-3.4">Section 3.4</a>&gt;
    20141986</pre><p id="rfc.section.9.3.p.3">An example is:</p>
    2015       <div id="rfc.figure.u.17"></div><pre class="text">  From: webmaster@example.org
     1987      <div id="rfc.figure.u.12"></div><pre class="text">  From: webmaster@example.org
    20161988</pre><p id="rfc.section.9.3.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
    20171989         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
     
    20362008      <p id="rfc.section.9.4.p.3">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>).
    20372009      </p>
    2038       <div id="rfc.figure.u.18"></div><pre class="inline"><span id="rfc.iref.g.15"></span><span id="rfc.iref.g.16"></span>  <a href="#header.location" class="smpl">Location</a>       = "Location" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.location" class="smpl">Location-v</a>
     2010      <div id="rfc.figure.u.13"></div><pre class="inline"><span id="rfc.iref.g.15"></span><span id="rfc.iref.g.16"></span>  <a href="#header.location" class="smpl">Location</a>       = "Location" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.location" class="smpl">Location-v</a>
    20392011  <a href="#header.location" class="smpl">Location-v</a>     = <a href="#abnf.dependencies" class="smpl">URI-reference</a>
    2040 </pre><div id="rfc.figure.u.19"></div>
     2012</pre><div id="rfc.figure.u.14"></div>
    20412013      <p>Examples are:</p>  <pre class="text">  Location: http://www.example.org/pub/WWW/People.html#tim
    2042 </pre><div id="rfc.figure.u.20"></div><pre class="text">  Location: /index.html
     2014</pre><div id="rfc.figure.u.15"></div><pre class="text">  Location: /index.html
    20432015</pre><p id="rfc.section.9.4.p.7">There are circumstances in which a fragment identifier in a Location URI would not be appropriate: </p>
    20442016      <ul>
     
    20532025      </div>
    20542026      <div class="note" id="rfc.section.9.4.p.9">
    2055          <p> <b>Note:</b> The Content-Location header field (<a href="p3-payload.html#header.content-location" title="Content-Location">Section 6.7</a> of <a href="#Part3" id="rfc.xref.Part3.12"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>) differs from Location in that the Content-Location identifies the most specific resource corresponding to the enclosed representation.
     2027         <p> <b>Note:</b> The Content-Location header field (<a href="p3-payload.html#header.content-location" title="Content-Location">Section 6.7</a> of <a href="#Part3" id="rfc.xref.Part3.8"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>) differs from Location in that the Content-Location identifies the most specific resource corresponding to the enclosed representation.
    20562028            It is therefore possible for a response to contain header fields for both Location and Content-Location.
    20572029         </p>
     
    20632035         is attempting to trace a request which appears to be failing or looping in mid-chain.
    20642036      </p>
    2065       <div id="rfc.figure.u.21"></div><pre class="inline"><span id="rfc.iref.g.17"></span><span id="rfc.iref.g.18"></span>  <a href="#header.max-forwards" class="smpl">Max-Forwards</a>   = "Max-Forwards" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.max-forwards" class="smpl">Max-Forwards-v</a>
     2037      <div id="rfc.figure.u.16"></div><pre class="inline"><span id="rfc.iref.g.17"></span><span id="rfc.iref.g.18"></span>  <a href="#header.max-forwards" class="smpl">Max-Forwards</a>   = "Max-Forwards" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.max-forwards" class="smpl">Max-Forwards-v</a>
    20662038  <a href="#header.max-forwards" class="smpl">Max-Forwards-v</a> = 1*<a href="#notation" class="smpl">DIGIT</a>
    20672039</pre><p id="rfc.section.9.5.p.3">The Max-Forwards value is a decimal integer indicating the remaining number of times this request message can be forwarded.</p>
     
    20842056         non-HTTP URIs (e.g., FTP).
    20852057      </p>
    2086       <div id="rfc.figure.u.22"></div><pre class="inline"><span id="rfc.iref.g.19"></span><span id="rfc.iref.g.20"></span>  <a href="#header.referer" class="smpl">Referer</a>        = "Referer" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.referer" class="smpl">Referer-v</a>
     2058      <div id="rfc.figure.u.17"></div><pre class="inline"><span id="rfc.iref.g.19"></span><span id="rfc.iref.g.20"></span>  <a href="#header.referer" class="smpl">Referer</a>        = "Referer" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.referer" class="smpl">Referer-v</a>
    20872059  <a href="#header.referer" class="smpl">Referer-v</a>      = <a href="#abnf.dependencies" class="smpl">absolute-URI</a> / <a href="#abnf.dependencies" class="smpl">partial-URI</a>
    20882060</pre><p id="rfc.section.9.6.p.5">Example:</p>
    2089       <div id="rfc.figure.u.23"></div><pre class="text">  Referer: http://www.example.org/hypertext/Overview.html
     2061      <div id="rfc.figure.u.18"></div><pre class="text">  Referer: http://www.example.org/hypertext/Overview.html
    20902062</pre><p id="rfc.section.9.6.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;11.2</a> for security considerations.
    20912063      </p>
     
    20982070      </p>
    20992071      <p id="rfc.section.9.7.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>
    2100       <div id="rfc.figure.u.24"></div><pre class="inline"><span id="rfc.iref.g.21"></span><span id="rfc.iref.g.22"></span>  <a href="#header.retry-after" class="smpl">Retry-After</a>   = "Retry-After" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.retry-after" class="smpl">Retry-After-v</a>
     2072      <div id="rfc.figure.u.19"></div><pre class="inline"><span id="rfc.iref.g.21"></span><span id="rfc.iref.g.22"></span>  <a href="#header.retry-after" class="smpl">Retry-After</a>   = "Retry-After" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.retry-after" class="smpl">Retry-After-v</a>
    21012073  <a href="#header.retry-after" class="smpl">Retry-After-v</a> = <a href="#abnf.dependencies" class="smpl">HTTP-date</a> / <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>
    21022074</pre><div id="rule.delta-seconds">
    21032075         <p id="rfc.section.9.7.p.4">  Time spans are non-negative decimal integers, representing time in seconds.</p>
    21042076      </div>
    2105       <div id="rfc.figure.u.25"></div><pre class="inline"><span id="rfc.iref.g.23"></span>  <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>  = 1*<a href="#notation" class="smpl">DIGIT</a>
     2077      <div id="rfc.figure.u.20"></div><pre class="inline"><span id="rfc.iref.g.23"></span>  <a href="#rule.delta-seconds" class="smpl">delta-seconds</a>  = 1*<a href="#notation" class="smpl">DIGIT</a>
    21062078</pre><p id="rfc.section.9.7.p.6">Two examples of its use are</p>
    2107       <div id="rfc.figure.u.26"></div><pre class="text">  Retry-After: Fri, 31 Dec 1999 23:59:59 GMT
     2079      <div id="rfc.figure.u.21"></div><pre class="text">  Retry-After: Fri, 31 Dec 1999 23:59:59 GMT
    21082080  Retry-After: 120
    21092081</pre><p id="rfc.section.9.7.p.8">In the latter example, the delay is 2 minutes.</p>
     
    21122084      <h2 id="rfc.section.9.8"><a href="#rfc.section.9.8">9.8</a>&nbsp;<a id="header.server" href="#header.server">Server</a></h2>
    21132085      <p id="rfc.section.9.8.p.1">The "Server" header field contains information about the software used by the origin server to handle the request.</p>
    2114       <p id="rfc.section.9.8.p.2">The field can contain multiple product tokens (<a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 6.3</a> of <a href="#Part1" id="rfc.xref.Part1.33"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.34"><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
     2086      <p id="rfc.section.9.8.p.2">The field can contain multiple product tokens (<a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 6.3</a> of <a href="#Part1" id="rfc.xref.Part1.31"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.32"><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
    21152087         identifying the application.
    21162088      </p>
    2117       <div id="rfc.figure.u.27"></div><pre class="inline"><span id="rfc.iref.g.24"></span><span id="rfc.iref.g.25"></span>  <a href="#header.server" class="smpl">Server</a>         = "Server" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.server" class="smpl">Server-v</a>
     2089      <div id="rfc.figure.u.22"></div><pre class="inline"><span id="rfc.iref.g.24"></span><span id="rfc.iref.g.25"></span>  <a href="#header.server" class="smpl">Server</a>         = "Server" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.server" class="smpl">Server-v</a>
    21182090  <a href="#header.server" class="smpl">Server-v</a>       = <a href="#abnf.dependencies" class="smpl">product</a>
    21192091                   *( <a href="#core.rules" class="smpl">RWS</a> ( <a href="#abnf.dependencies" class="smpl">product</a> / <a href="#abnf.dependencies" class="smpl">comment</a> ) )
    21202092</pre><p id="rfc.section.9.8.p.4">Example:</p>
    2121       <div id="rfc.figure.u.28"></div><pre class="text">  Server: CERN/3.0 libwww/2.17
    2122 </pre><p id="rfc.section.9.8.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 9.9</a> of <a href="#Part1" id="rfc.xref.Part1.35"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
     2093      <div id="rfc.figure.u.23"></div><pre class="text">  Server: CERN/3.0 libwww/2.17
     2094</pre><p id="rfc.section.9.8.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 9.9</a> of <a href="#Part1" id="rfc.xref.Part1.33"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>).
    21232095      </p>
    21242096      <div class="note" id="rfc.section.9.8.p.7">
     
    21362108         user agent limitations.
    21372109      </p>
    2138       <p id="rfc.section.9.9.p.3">The field can contain multiple product tokens (<a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 6.3</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>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.37"><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
     2110      <p id="rfc.section.9.9.p.3">The field can contain multiple product tokens (<a href="p1-messaging.html#product.tokens" title="Product Tokens">Section 6.3</a> of <a href="#Part1" id="rfc.xref.Part1.34"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) and comments (<a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.35"><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
    21392111         for identifying the application.
    21402112      </p>
     
    21472119         doing so makes the field value more difficult to parse.
    21482120      </p>
    2149       <div id="rfc.figure.u.29"></div><pre class="inline"><span id="rfc.iref.g.26"></span><span id="rfc.iref.g.27"></span>  <a href="#header.user-agent" class="smpl">User-Agent</a>     = "User-Agent" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.user-agent" class="smpl">User-Agent-v</a>
     2121      <div id="rfc.figure.u.24"></div><pre class="inline"><span id="rfc.iref.g.26"></span><span id="rfc.iref.g.27"></span>  <a href="#header.user-agent" class="smpl">User-Agent</a>     = "User-Agent" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.user-agent" class="smpl">User-Agent-v</a>
    21502122  <a href="#header.user-agent" class="smpl">User-Agent-v</a>   = <a href="#abnf.dependencies" class="smpl">product</a> *( <a href="#core.rules" class="smpl">RWS</a> ( <a href="#abnf.dependencies" class="smpl">product</a> / <a href="#abnf.dependencies" class="smpl">comment</a> ) )
    21512123</pre><p id="rfc.section.9.9.p.7">Example:</p>
    2152       <div id="rfc.figure.u.30"></div><pre class="text">  User-Agent: CERN-LineMode/2.15 libwww/2.17b3
     2124      <div id="rfc.figure.u.25"></div><pre class="text">  User-Agent: CERN-LineMode/2.15 libwww/2.17b3
    21532125</pre><h1 id="rfc.section.10"><a href="#rfc.section.10">10.</a>&nbsp;<a id="IANA.considerations" href="#IANA.considerations">IANA Considerations</a></h1>
    21542126      <h2 id="rfc.section.10.1"><a href="#rfc.section.10.1">10.1</a>&nbsp;<a id="method.registration" href="#method.registration">Method Registry</a></h2>
     
    27452717      </p>
    27462718      <p id="rfc.section.A.p.12">In the description of the Server header field, the Via field was described as a SHOULD. The requirement was and is stated
    2747          correctly in the description of the Via header field in <a href="p1-messaging.html#header.via" title="Via">Section 9.9</a> of <a href="#Part1" id="rfc.xref.Part1.38"><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;9.8</a>)
     2719         correctly in the description of the Via header field in <a href="p1-messaging.html#header.via" title="Via">Section 9.9</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>. (<a href="#header.server" id="rfc.xref.header.server.4" title="Server">Section&nbsp;9.8</a>)
    27482720      </p>
    27492721      <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a>&nbsp;<a id="collected.abnf" href="#collected.abnf">Collected ABNF</a></h1>
    2750       <div id="rfc.figure.u.31"></div> <pre class="inline"><a href="#abnf.dependencies" class="smpl">Accept</a> = &lt;Accept, defined in [Part3], Section 6.1&gt;
    2751 <a href="#abnf.dependencies" class="smpl">Accept-Charset</a> = &lt;Accept-Charset, defined in [Part3], Section 6.2&gt;
    2752 <a href="#abnf.dependencies" class="smpl">Accept-Encoding</a> = &lt;Accept-Encoding, defined in [Part3], Section 6.3&gt;
    2753 <a href="#abnf.dependencies" class="smpl">Accept-Language</a> = &lt;Accept-Language, defined in [Part3], Section 6.4&gt;
    2754 <a href="#abnf.dependencies" class="smpl">Accept-Ranges</a> = &lt;Accept-Ranges, defined in [Part5], Section 5.1&gt;
    2755 <a href="#abnf.dependencies" class="smpl">Age</a> = &lt;Age, defined in [Part6], Section 3.1&gt;
    2756 <a href="#header.allow" class="smpl">Allow</a> = "Allow:" OWS Allow-v
     2722      <div id="rfc.figure.u.26"></div> <pre class="inline"><a href="#header.allow" class="smpl">Allow</a> = "Allow:" OWS Allow-v
    27572723<a href="#header.allow" class="smpl">Allow-v</a> = [ ( "," / Method ) *( OWS "," [ OWS Method ] ) ]
    2758 <a href="#abnf.dependencies" class="smpl">Authorization</a> = &lt;Authorization, defined in [Part7], Section 4.1&gt;
    27592724
    2760 <a href="#abnf.dependencies" class="smpl">ETag</a> = &lt;ETag, defined in [Part4], Section 6.1&gt;
    27612725<a href="#header.expect" class="smpl">Expect</a> = "Expect:" OWS Expect-v
    27622726<a href="#header.expect" class="smpl">Expect-v</a> = *( "," OWS ) expectation *( OWS "," [ OWS expectation ] )
     
    27662730
    27672731<a href="#abnf.dependencies" class="smpl">HTTP-date</a> = &lt;HTTP-date, defined in [Part1], Section 6.1&gt;
    2768 <a href="#abnf.dependencies" class="smpl">Host</a> = &lt;Host, defined in [Part1], Section 2.6&gt;
    2769 
    2770 <a href="#abnf.dependencies" class="smpl">If-Match</a> = &lt;If-Match, defined in [Part4], Section 6.2&gt;
    2771 If-Modified-Since =
    2772  &lt;If-Modified-Since, defined in [Part4], Section 6.3&gt;
    2773 <a href="#abnf.dependencies" class="smpl">If-None-Match</a> = &lt;If-None-Match, defined in [Part4], Section 6.4&gt;
    2774 <a href="#abnf.dependencies" class="smpl">If-Range</a> = &lt;If-Range, defined in [Part5], Section 5.3&gt;
    2775 If-Unmodified-Since =
    2776  &lt;If-Unmodified-Since, defined in [Part4], Section 6.5&gt;
    27772732
    27782733<a href="#header.location" class="smpl">Location</a> = "Location:" OWS Location-v
     
    27852740<a href="#core.rules" class="smpl">OWS</a> = &lt;OWS, defined in [Part1], Section 1.2.2&gt;
    27862741
    2787 Proxy-Authenticate =
    2788  &lt;Proxy-Authenticate, defined in [Part7], Section 4.2&gt;
    2789 Proxy-Authorization =
    2790  &lt;Proxy-Authorization, defined in [Part7], Section 4.3&gt;
    2791 
    27922742<a href="#core.rules" class="smpl">RWS</a> = &lt;RWS, defined in [Part1], Section 1.2.2&gt;
    2793 <a href="#abnf.dependencies" class="smpl">Range</a> = &lt;Range, defined in [Part5], Section 5.4&gt;
    27942743<a href="#status.code.and.reason.phrase" class="smpl">Reason-Phrase</a> = *( WSP / VCHAR / obs-text )
    27952744<a href="#header.referer" class="smpl">Referer</a> = "Referer:" OWS Referer-v
     
    28022751<a href="#status.code.and.reason.phrase" class="smpl">Status-Code</a> = 3DIGIT
    28032752
    2804 <a href="#abnf.dependencies" class="smpl">TE</a> = &lt;TE, defined in [Part1], Section 9.5&gt;
    2805 
    28062753<a href="#abnf.dependencies" class="smpl">URI-reference</a> = &lt;URI-reference, defined in [Part1], Section 2.6&gt;
    28072754<a href="#header.user-agent" class="smpl">User-Agent</a> = "User-Agent:" OWS User-Agent-v
    28082755<a href="#header.user-agent" class="smpl">User-Agent-v</a> = product *( RWS ( product / comment ) )
    2809 
    2810 <a href="#abnf.dependencies" class="smpl">Vary</a> = &lt;Vary, defined in [Part6], Section 3.5&gt;
    2811 
    2812 WWW-Authenticate =
    2813  &lt;WWW-Authenticate, defined in [Part7], Section 4.4&gt;
    28142756
    28152757<a href="#abnf.dependencies" class="smpl">absolute-URI</a> = &lt;absolute-URI, defined in [Part1], Section 2.6&gt;
     
    28342776
    28352777<a href="#core.rules" class="smpl">token</a> = &lt;token, defined in [Part1], Section 1.2.2&gt;
    2836 </pre> <div id="rfc.figure.u.32"></div>
    2837       <p>ABNF diagnostics:</p><pre class="inline">; Accept defined but not used
    2838 ; Accept-Charset defined but not used
    2839 ; Accept-Encoding defined but not used
    2840 ; Accept-Language defined but not used
    2841 ; Accept-Ranges defined but not used
    2842 ; Age defined but not used
    2843 ; Allow defined but not used
    2844 ; Authorization defined but not used
    2845 ; ETag defined but not used
     2778</pre> <div id="rfc.figure.u.27"></div>
     2779      <p>ABNF diagnostics:</p><pre class="inline">; Allow defined but not used
    28462780; Expect defined but not used
    28472781; From defined but not used
    2848 ; Host defined but not used
    2849 ; If-Match defined but not used
    2850 ; If-Modified-Since defined but not used
    2851 ; If-None-Match defined but not used
    2852 ; If-Range defined but not used
    2853 ; If-Unmodified-Since defined but not used
    28542782; Location defined but not used
    28552783; Max-Forwards defined but not used
    2856 ; Proxy-Authenticate defined but not used
    2857 ; Proxy-Authorization defined but not used
    2858 ; Range defined but not used
    28592784; Reason-Phrase defined but not used
    28602785; Referer defined but not used
     
    28622787; Server defined but not used
    28632788; Status-Code defined but not used
    2864 ; TE defined but not used
    28652789; User-Agent defined but not used
    2866 ; Vary defined but not used
    2867 ; WWW-Authenticate defined but not used
    28682790</pre><h1 id="rfc.section.C"><a href="#rfc.section.C">C.</a>&nbsp;<a id="change.log" href="#change.log">Change Log (to be removed by RFC Editor before publication)</a></h1>
    28692791      <h2 id="rfc.section.C.1"><a href="#rfc.section.C.1">C.1</a>&nbsp;Since RFC 2616
     
    28942816      <p id="rfc.section.C.2.p.2">Other changes: </p>
    28952817      <ul>
    2896          <li>Move definitions of 304 and 412 condition codes to <a href="#Part4" id="rfc.xref.Part4.17"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>
     2818         <li>Move definitions of 304 and 412 condition codes to <a href="#Part4" id="rfc.xref.Part4.12"><cite title="HTTP/1.1, part 4: Conditional Requests">[Part4]</cite></a>
    28972819         </li>
    28982820      </ul>
     
    32673189            </li>
    32683190            <li><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul>
    3269                   <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">1.2.1</a>, <a href="#rfc.xref.Part1.4">1.2.1</a>, <a href="#rfc.xref.Part1.5">1.2.1</a>, <a href="#rfc.xref.Part1.6">1.2.1</a>, <a href="#rfc.xref.Part1.7">1.2.1</a>, <a href="#rfc.xref.Part1.8">1.2.1</a>, <a href="#rfc.xref.Part1.9">1.2.2</a>, <a href="#rfc.xref.Part1.10">1.2.2</a>, <a href="#rfc.xref.Part1.11">1.2.2</a>, <a href="#rfc.xref.Part1.12">1.2.2</a>, <a href="#rfc.xref.Part1.13">1.2.2</a>, <a href="#rfc.xref.Part1.14">1.2.2</a>, <a href="#rfc.xref.Part1.15">1.2.2</a>, <a href="#rfc.xref.Part1.16">1.2.2</a>, <a href="#rfc.xref.Part1.17">2</a>, <a href="#rfc.xref.Part1.18">2.2.1</a>, <a href="#rfc.xref.Part1.19">3</a>, <a href="#rfc.xref.Part1.20">3</a>, <a href="#rfc.xref.Part1.21">5</a>, <a href="#rfc.xref.Part1.22">6</a>, <a href="#rfc.xref.Part1.23">6.1</a>, <a href="#rfc.xref.Part1.24">7.8</a>, <a href="#rfc.xref.Part1.25">7.8</a>, <a href="#rfc.xref.Part1.26">7.9</a>, <a href="#rfc.xref.Part1.27">8.1.1</a>, <a href="#rfc.xref.Part1.28">8.1.2</a>, <a href="#rfc.xref.Part1.29">8.2.6</a>, <a href="#rfc.xref.Part1.30">8.4.19</a>, <a href="#rfc.xref.Part1.31">8.5.6</a>, <a href="#rfc.xref.Part1.32">9.2</a>, <a href="#rfc.xref.Part1.33">9.8</a>, <a href="#rfc.xref.Part1.34">9.8</a>, <a href="#rfc.xref.Part1.35">9.8</a>, <a href="#rfc.xref.Part1.36">9.9</a>, <a href="#rfc.xref.Part1.37">9.9</a>, <a href="#Part1"><b>13.1</b></a>, <a href="#rfc.xref.Part1.38">A</a><ul>
     3191                  <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">1.2.1</a>, <a href="#rfc.xref.Part1.4">1.2.1</a>, <a href="#rfc.xref.Part1.5">1.2.1</a>, <a href="#rfc.xref.Part1.6">1.2.1</a>, <a href="#rfc.xref.Part1.7">1.2.1</a>, <a href="#rfc.xref.Part1.8">1.2.1</a>, <a href="#rfc.xref.Part1.9">1.2.2</a>, <a href="#rfc.xref.Part1.10">1.2.2</a>, <a href="#rfc.xref.Part1.11">1.2.2</a>, <a href="#rfc.xref.Part1.12">1.2.2</a>, <a href="#rfc.xref.Part1.13">1.2.2</a>, <a href="#rfc.xref.Part1.14">1.2.2</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">3</a>, <a href="#rfc.xref.Part1.18">3</a>, <a href="#rfc.xref.Part1.19">5</a>, <a href="#rfc.xref.Part1.20">6</a>, <a href="#rfc.xref.Part1.21">6.1</a>, <a href="#rfc.xref.Part1.22">7.8</a>, <a href="#rfc.xref.Part1.23">7.8</a>, <a href="#rfc.xref.Part1.24">7.9</a>, <a href="#rfc.xref.Part1.25">8.1.1</a>, <a href="#rfc.xref.Part1.26">8.1.2</a>, <a href="#rfc.xref.Part1.27">8.2.6</a>, <a href="#rfc.xref.Part1.28">8.4.19</a>, <a href="#rfc.xref.Part1.29">8.5.6</a>, <a href="#rfc.xref.Part1.30">9.2</a>, <a href="#rfc.xref.Part1.31">9.8</a>, <a href="#rfc.xref.Part1.32">9.8</a>, <a href="#rfc.xref.Part1.33">9.8</a>, <a href="#rfc.xref.Part1.34">9.9</a>, <a href="#rfc.xref.Part1.35">9.9</a>, <a href="#Part1"><b>13.1</b></a>, <a href="#rfc.xref.Part1.36">A</a><ul>
    32703192                        <li><em>Section 1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.2">1.2</a></li>
    32713193                        <li><em>Section 1.2.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.3">1.2.1</a>, <a href="#rfc.xref.Part1.4">1.2.1</a>, <a href="#rfc.xref.Part1.5">1.2.1</a>, <a href="#rfc.xref.Part1.6">1.2.1</a>, <a href="#rfc.xref.Part1.7">1.2.1</a>, <a href="#rfc.xref.Part1.8">1.2.1</a></li>
    3272                         <li><em>Section 2.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.31">8.5.6</a></li>
    3273                         <li><em>Section 2.6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.9">1.2.2</a>, <a href="#rfc.xref.Part1.11">1.2.2</a>, <a href="#rfc.xref.Part1.13">1.2.2</a>, <a href="#rfc.xref.Part1.16">1.2.2</a></li>
    3274                         <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.10">1.2.2</a>, <a href="#rfc.xref.Part1.34">9.8</a>, <a href="#rfc.xref.Part1.37">9.9</a></li>
    3275                         <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.18">2.2.1</a>, <a href="#rfc.xref.Part1.22">6</a>, <a href="#rfc.xref.Part1.29">8.2.6</a></li>
    3276                         <li><em>Section 4.1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.26">7.9</a></li>
    3277                         <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.17">2</a>, <a href="#rfc.xref.Part1.21">5</a>, <a href="#rfc.xref.Part1.23">6.1</a></li>
    3278                         <li><em>Section 6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.12">1.2.2</a></li>
    3279                         <li><em>Section 6.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.14">1.2.2</a>, <a href="#rfc.xref.Part1.33">9.8</a>, <a href="#rfc.xref.Part1.36">9.9</a></li>
    3280                         <li><em>Section 7.2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.27">8.1.1</a>, <a href="#rfc.xref.Part1.32">9.2</a></li>
    3281                         <li><em>Section 9.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.19">3</a></li>
    3282                         <li><em>Section 9.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.15">1.2.2</a>, <a href="#rfc.xref.Part1.20">3</a></li>
    3283                         <li><em>Section 9.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.28">8.1.2</a>, <a href="#rfc.xref.Part1.30">8.4.19</a></li>
    3284                         <li><em>Section 9.9</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.24">7.8</a>, <a href="#rfc.xref.Part1.35">9.8</a>, <a href="#rfc.xref.Part1.38">A</a></li>
    3285                         <li><em>Section 10.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.25">7.8</a></li>
     3194                        <li><em>Section 2.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.29">8.5.6</a></li>
     3195                        <li><em>Section 2.6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.9">1.2.2</a>, <a href="#rfc.xref.Part1.12">1.2.2</a>, <a href="#rfc.xref.Part1.14">1.2.2</a></li>
     3196                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.10">1.2.2</a>, <a href="#rfc.xref.Part1.32">9.8</a>, <a href="#rfc.xref.Part1.35">9.9</a></li>
     3197                        <li><em>Section 3.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.16">2.2.1</a>, <a href="#rfc.xref.Part1.20">6</a>, <a href="#rfc.xref.Part1.27">8.2.6</a></li>
     3198                        <li><em>Section 4.1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.24">7.9</a></li>
     3199                        <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.15">2</a>, <a href="#rfc.xref.Part1.19">5</a>, <a href="#rfc.xref.Part1.21">6.1</a></li>
     3200                        <li><em>Section 6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.11">1.2.2</a></li>
     3201                        <li><em>Section 6.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.13">1.2.2</a>, <a href="#rfc.xref.Part1.31">9.8</a>, <a href="#rfc.xref.Part1.34">9.9</a></li>
     3202                        <li><em>Section 7.2.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.25">8.1.1</a>, <a href="#rfc.xref.Part1.30">9.2</a></li>
     3203                        <li><em>Section 9.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.17">3</a></li>
     3204                        <li><em>Section 9.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.18">3</a></li>
     3205                        <li><em>Section 9.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.26">8.1.2</a>, <a href="#rfc.xref.Part1.28">8.4.19</a></li>
     3206                        <li><em>Section 9.9</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.22">7.8</a>, <a href="#rfc.xref.Part1.33">9.8</a>, <a href="#rfc.xref.Part1.36">A</a></li>
     3207                        <li><em>Section 10.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.23">7.8</a></li>
    32863208                     </ul>
    32873209                  </li>
    3288                   <li><em>Part3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.1">1.2.2</a>, <a href="#rfc.xref.Part3.2">1.2.2</a>, <a href="#rfc.xref.Part3.3">1.2.2</a>, <a href="#rfc.xref.Part3.4">1.2.2</a>, <a href="#rfc.xref.Part3.5">3</a>, <a href="#rfc.xref.Part3.6">3</a>, <a href="#rfc.xref.Part3.7">3</a>, <a href="#rfc.xref.Part3.8">3</a>, <a href="#rfc.xref.Part3.9">6</a>, <a href="#rfc.xref.Part3.10">7.5</a>, <a href="#rfc.xref.Part3.11">8.3.1</a>, <a href="#rfc.xref.Part3.12">9.4</a>, <a href="#Part3"><b>13.1</b></a><ul>
    3289                         <li><em>Section 5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.11">8.3.1</a></li>
    3290                         <li><em>Section 6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.1">1.2.2</a>, <a href="#rfc.xref.Part3.5">3</a></li>
    3291                         <li><em>Section 6.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.2">1.2.2</a>, <a href="#rfc.xref.Part3.6">3</a></li>
    3292                         <li><em>Section 6.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.3">1.2.2</a>, <a href="#rfc.xref.Part3.7">3</a></li>
    3293                         <li><em>Section 6.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.4">1.2.2</a>, <a href="#rfc.xref.Part3.8">3</a></li>
    3294                         <li><em>Section 6.7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.10">7.5</a>, <a href="#rfc.xref.Part3.12">9.4</a></li>
     3210                  <li><em>Part3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.1">3</a>, <a href="#rfc.xref.Part3.2">3</a>, <a href="#rfc.xref.Part3.3">3</a>, <a href="#rfc.xref.Part3.4">3</a>, <a href="#rfc.xref.Part3.5">6</a>, <a href="#rfc.xref.Part3.6">7.5</a>, <a href="#rfc.xref.Part3.7">8.3.1</a>, <a href="#rfc.xref.Part3.8">9.4</a>, <a href="#Part3"><b>13.1</b></a><ul>
     3211                        <li><em>Section 5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.7">8.3.1</a></li>
     3212                        <li><em>Section 6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.1">3</a></li>
     3213                        <li><em>Section 6.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.2">3</a></li>
     3214                        <li><em>Section 6.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.3">3</a></li>
     3215                        <li><em>Section 6.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.4">3</a></li>
     3216                        <li><em>Section 6.7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part3.6">7.5</a>, <a href="#rfc.xref.Part3.8">9.4</a></li>
    32953217                     </ul>
    32963218                  </li>
    3297                   <li><em>Part4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">1.2.2</a>, <a href="#rfc.xref.Part4.2">1.2.2</a>, <a href="#rfc.xref.Part4.3">1.2.2</a>, <a href="#rfc.xref.Part4.4">1.2.2</a>, <a href="#rfc.xref.Part4.5">1.2.2</a>, <a href="#rfc.xref.Part4.6">3</a>, <a href="#rfc.xref.Part4.7">3</a>, <a href="#rfc.xref.Part4.8">3</a>, <a href="#rfc.xref.Part4.9">3</a>, <a href="#rfc.xref.Part4.10">4.1</a>, <a href="#rfc.xref.Part4.11">4.1</a>, <a href="#rfc.xref.Part4.12">4.1</a>, <a href="#rfc.xref.Part4.13">5</a>, <a href="#rfc.xref.Part4.14">8.2.2</a>, <a href="#rfc.xref.Part4.15">8.3.5</a>, <a href="#rfc.xref.Part4.16">8.4.13</a>, <a href="#Part4"><b>13.1</b></a>, <a href="#rfc.xref.Part4.17">C.2</a><ul>
    3298                         <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.10">4.1</a></li>
    3299                         <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.11">4.1</a>, <a href="#rfc.xref.Part4.15">8.3.5</a></li>
    3300                         <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.12">4.1</a>, <a href="#rfc.xref.Part4.16">8.4.13</a></li>
    3301                         <li><em>Section 6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">1.2.2</a>, <a href="#rfc.xref.Part4.13">5</a>, <a href="#rfc.xref.Part4.14">8.2.2</a></li>
    3302                         <li><em>Section 6.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.2">1.2.2</a>, <a href="#rfc.xref.Part4.6">3</a></li>
    3303                         <li><em>Section 6.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.3">1.2.2</a>, <a href="#rfc.xref.Part4.7">3</a></li>
    3304                         <li><em>Section 6.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.4">1.2.2</a>, <a href="#rfc.xref.Part4.8">3</a></li>
    3305                         <li><em>Section 6.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.5">1.2.2</a>, <a href="#rfc.xref.Part4.9">3</a></li>
     3219                  <li><em>Part4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3</a>, <a href="#rfc.xref.Part4.2">3</a>, <a href="#rfc.xref.Part4.3">3</a>, <a href="#rfc.xref.Part4.4">3</a>, <a href="#rfc.xref.Part4.5">4.1</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">5</a>, <a href="#rfc.xref.Part4.9">8.2.2</a>, <a href="#rfc.xref.Part4.10">8.3.5</a>, <a href="#rfc.xref.Part4.11">8.4.13</a>, <a href="#Part4"><b>13.1</b></a>, <a href="#rfc.xref.Part4.12">C.2</a><ul>
     3220                        <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.5">4.1</a></li>
     3221                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.6">4.1</a>, <a href="#rfc.xref.Part4.10">8.3.5</a></li>
     3222                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.7">4.1</a>, <a href="#rfc.xref.Part4.11">8.4.13</a></li>
     3223                        <li><em>Section 6.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.8">5</a>, <a href="#rfc.xref.Part4.9">8.2.2</a></li>
     3224                        <li><em>Section 6.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.1">3</a></li>
     3225                        <li><em>Section 6.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.2">3</a></li>
     3226                        <li><em>Section 6.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.3">3</a></li>
     3227                        <li><em>Section 6.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part4.4">3</a></li>
    33063228                     </ul>
    33073229                  </li>
    3308                   <li><em>Part5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">1.2.2</a>, <a href="#rfc.xref.Part5.2">1.2.2</a>, <a href="#rfc.xref.Part5.3">1.2.2</a>, <a href="#rfc.xref.Part5.4">3</a>, <a href="#rfc.xref.Part5.5">3</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">4.1</a>, <a href="#rfc.xref.Part5.9">5</a>, <a href="#rfc.xref.Part5.10">7.3</a>, <a href="#rfc.xref.Part5.11">8.2.7</a>, <a href="#rfc.xref.Part5.12">8.4.17</a>, <a href="#rfc.xref.Part5.13">8.4.17</a>, <a href="#Part5"><b>13.1</b></a><ul>
    3309                         <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.6">4.1</a></li>
    3310                         <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.7">4.1</a>, <a href="#rfc.xref.Part5.11">8.2.7</a></li>
    3311                         <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.8">4.1</a>, <a href="#rfc.xref.Part5.13">8.4.17</a></li>
    3312                         <li><em>Section 5.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">1.2.2</a>, <a href="#rfc.xref.Part5.9">5</a></li>
    3313                         <li><em>Section 5.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.2">1.2.2</a>, <a href="#rfc.xref.Part5.4">3</a></li>
    3314                         <li><em>Section 5.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.3">1.2.2</a>, <a href="#rfc.xref.Part5.5">3</a>, <a href="#rfc.xref.Part5.10">7.3</a>, <a href="#rfc.xref.Part5.12">8.4.17</a></li>
     3230                  <li><em>Part5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">3</a>, <a href="#rfc.xref.Part5.2">3</a>, <a href="#rfc.xref.Part5.3">4.1</a>, <a href="#rfc.xref.Part5.4">4.1</a>, <a href="#rfc.xref.Part5.5">4.1</a>, <a href="#rfc.xref.Part5.6">5</a>, <a href="#rfc.xref.Part5.7">7.3</a>, <a href="#rfc.xref.Part5.8">8.2.7</a>, <a href="#rfc.xref.Part5.9">8.4.17</a>, <a href="#rfc.xref.Part5.10">8.4.17</a>, <a href="#Part5"><b>13.1</b></a><ul>
     3231                        <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.3">4.1</a></li>
     3232                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.4">4.1</a>, <a href="#rfc.xref.Part5.8">8.2.7</a></li>
     3233                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.5">4.1</a>, <a href="#rfc.xref.Part5.10">8.4.17</a></li>
     3234                        <li><em>Section 5.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.6">5</a></li>
     3235                        <li><em>Section 5.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.1">3</a></li>
     3236                        <li><em>Section 5.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part5.2">3</a>, <a href="#rfc.xref.Part5.7">7.3</a>, <a href="#rfc.xref.Part5.9">8.4.17</a></li>
    33153237                     </ul>
    33163238                  </li>
    3317                   <li><em>Part6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.1">1.2.2</a>, <a href="#rfc.xref.Part6.2">1.2.2</a>, <a href="#rfc.xref.Part6.3">2.2.1</a>, <a href="#rfc.xref.Part6.4">4.2.1</a>, <a href="#rfc.xref.Part6.5">5</a>, <a href="#rfc.xref.Part6.6">5</a>, <a href="#rfc.xref.Part6.7">6.1</a>, <a href="#rfc.xref.Part6.8">7.3</a>, <a href="#rfc.xref.Part6.9">7.4</a>, <a href="#rfc.xref.Part6.10">7.5</a>, <a href="#rfc.xref.Part6.11">7.6</a>, <a href="#rfc.xref.Part6.12">7.7</a>, <a href="#rfc.xref.Part6.13">8.2.1</a>, <a href="#rfc.xref.Part6.14">8.2.4</a>, <a href="#rfc.xref.Part6.15">8.2.7</a>, <a href="#rfc.xref.Part6.16">8.3.1</a>, <a href="#rfc.xref.Part6.17">8.3.2</a>, <a href="#rfc.xref.Part6.18">8.4.11</a>, <a href="#Part6"><b>13.1</b></a><ul>
    3318                         <li><em>Section 2.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.10">7.5</a></li>
    3319                         <li><em>Section 2.3.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.13">8.2.1</a>, <a href="#rfc.xref.Part6.14">8.2.4</a>, <a href="#rfc.xref.Part6.15">8.2.7</a>, <a href="#rfc.xref.Part6.16">8.3.1</a>, <a href="#rfc.xref.Part6.17">8.3.2</a>, <a href="#rfc.xref.Part6.18">8.4.11</a></li>
    3320                         <li><em>Section 2.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.11">7.6</a>, <a href="#rfc.xref.Part6.12">7.7</a></li>
    3321                         <li><em>Section 2.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.7">6.1</a></li>
    3322                         <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.1">1.2.2</a>, <a href="#rfc.xref.Part6.5">5</a></li>
    3323                         <li><em>Section 3.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.2">1.2.2</a>, <a href="#rfc.xref.Part6.6">5</a></li>
     3239                  <li><em>Part6</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.1">2.2.1</a>, <a href="#rfc.xref.Part6.2">4.2.1</a>, <a href="#rfc.xref.Part6.3">5</a>, <a href="#rfc.xref.Part6.4">5</a>, <a href="#rfc.xref.Part6.5">6.1</a>, <a href="#rfc.xref.Part6.6">7.3</a>, <a href="#rfc.xref.Part6.7">7.4</a>, <a href="#rfc.xref.Part6.8">7.5</a>, <a href="#rfc.xref.Part6.9">7.6</a>, <a href="#rfc.xref.Part6.10">7.7</a>, <a href="#rfc.xref.Part6.11">8.2.1</a>, <a href="#rfc.xref.Part6.12">8.2.4</a>, <a href="#rfc.xref.Part6.13">8.2.7</a>, <a href="#rfc.xref.Part6.14">8.3.1</a>, <a href="#rfc.xref.Part6.15">8.3.2</a>, <a href="#rfc.xref.Part6.16">8.4.11</a>, <a href="#Part6"><b>13.1</b></a><ul>
     3240                        <li><em>Section 2.3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.8">7.5</a></li>
     3241                        <li><em>Section 2.3.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.11">8.2.1</a>, <a href="#rfc.xref.Part6.12">8.2.4</a>, <a href="#rfc.xref.Part6.13">8.2.7</a>, <a href="#rfc.xref.Part6.14">8.3.1</a>, <a href="#rfc.xref.Part6.15">8.3.2</a>, <a href="#rfc.xref.Part6.16">8.4.11</a></li>
     3242                        <li><em>Section 2.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.9">7.6</a>, <a href="#rfc.xref.Part6.10">7.7</a></li>
     3243                        <li><em>Section 2.8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.5">6.1</a></li>
     3244                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.3">5</a></li>
     3245                        <li><em>Section 3.5</em>&nbsp;&nbsp;<a href="#rfc.xref.Part6.4">5</a></li>
    33243246                     </ul>
    33253247                  </li>
    3326                   <li><em>Part7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.1">1.2.2</a>, <a href="#rfc.xref.Part7.2">1.2.2</a>, <a href="#rfc.xref.Part7.3">1.2.2</a>, <a href="#rfc.xref.Part7.4">1.2.2</a>, <a href="#rfc.xref.Part7.5">3</a>, <a href="#rfc.xref.Part7.6">3</a>, <a href="#rfc.xref.Part7.7">4.1</a>, <a href="#rfc.xref.Part7.8">4.1</a>, <a href="#rfc.xref.Part7.9">4.1</a>, <a href="#rfc.xref.Part7.10">5</a>, <a href="#rfc.xref.Part7.11">5</a>, <a href="#rfc.xref.Part7.12">8.4.2</a>, <a href="#rfc.xref.Part7.13">8.4.8</a>, <a href="#Part7"><b>13.1</b></a><ul>
    3327                         <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.7">4.1</a></li>
    3328                         <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.8">4.1</a>, <a href="#rfc.xref.Part7.12">8.4.2</a></li>
    3329                         <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.9">4.1</a>, <a href="#rfc.xref.Part7.13">8.4.8</a></li>
    3330                         <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.1">1.2.2</a>, <a href="#rfc.xref.Part7.5">3</a></li>
    3331                         <li><em>Section 4.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.2">1.2.2</a>, <a href="#rfc.xref.Part7.10">5</a></li>
    3332                         <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.3">1.2.2</a>, <a href="#rfc.xref.Part7.6">3</a></li>
    3333                         <li><em>Section 4.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.4">1.2.2</a>, <a href="#rfc.xref.Part7.11">5</a></li>
     3248                  <li><em>Part7</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.1">3</a>, <a href="#rfc.xref.Part7.2">3</a>, <a href="#rfc.xref.Part7.3">4.1</a>, <a href="#rfc.xref.Part7.4">4.1</a>, <a href="#rfc.xref.Part7.5">4.1</a>, <a href="#rfc.xref.Part7.6">5</a>, <a href="#rfc.xref.Part7.7">5</a>, <a href="#rfc.xref.Part7.8">8.4.2</a>, <a href="#rfc.xref.Part7.9">8.4.8</a>, <a href="#Part7"><b>13.1</b></a><ul>
     3249                        <li><em>Section 3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.3">4.1</a></li>
     3250                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.4">4.1</a>, <a href="#rfc.xref.Part7.8">8.4.2</a></li>
     3251                        <li><em>Section 3.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.5">4.1</a>, <a href="#rfc.xref.Part7.9">8.4.8</a></li>
     3252                        <li><em>Section 4.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.1">3</a></li>
     3253                        <li><em>Section 4.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.6">5</a></li>
     3254                        <li><em>Section 4.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.2">3</a></li>
     3255                        <li><em>Section 4.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part7.7">5</a></li>
    33343256                     </ul>
    33353257                  </li>
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