Ignore:
Timestamp:
Jul 16, 2012, 7:30:03 AM (7 years ago)
Author:
julian.reschke@…
Message:

Move imported ABNF rules to appendix sections

File:
1 edited

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  • draft-ietf-httpbis/latest/p4-conditional.html

    r1803 r1805  
    481481      <link rel="Chapter" href="#rfc.section.9" title="9 References">
    482482      <link rel="Appendix" title="A Changes from RFC 2616" href="#rfc.section.A">
    483       <link rel="Appendix" title="B Collected ABNF" href="#rfc.section.B">
    484       <link rel="Appendix" title="C Change Log (to be removed by RFC Editor before publication)" href="#rfc.section.C">
     483      <link rel="Appendix" title="B Imported ABNF" href="#rfc.section.B">
     484      <link rel="Appendix" title="C Collected ABNF" href="#rfc.section.C">
     485      <link rel="Appendix" title="D Change Log (to be removed by RFC Editor before publication)" href="#rfc.section.D">
    485486      <link href="p3-payload.html" rel="prev">
    486487      <link href="p5-range.html" rel="next">
    … …  
    542543      <p>The current issues list is at &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/report/3">http://tools.ietf.org/wg/httpbis/trac/report/3</a>&gt; and related documents (including fancy diffs) can be found at &lt;<a href="http://tools.ietf.org/wg/httpbis/">http://tools.ietf.org/wg/httpbis/</a>&gt;.
    543544      </p> 
    544       <p>The changes in this draft are summarized in <a href="#changes.since.19" title="Since draft-ietf-httpbis-p4-conditional-19">Appendix&nbsp;C.1</a>.
     545      <p>The changes in this draft are summarized in <a href="#changes.since.19" title="Since draft-ietf-httpbis-p4-conditional-19">Appendix&nbsp;D.1</a>.
    545546      </p>
    546547      <h1><a id="rfc.status" href="#rfc.status">Status of This Memo</a></h1>
    … …  
    620621         <li><a href="#rfc.authors">Authors' Addresses</a></li>
    621622         <li>A.&nbsp;&nbsp;&nbsp;<a href="#changes.from.rfc.2616">Changes from RFC 2616</a></li>
    622          <li>B.&nbsp;&nbsp;&nbsp;<a href="#collected.abnf">Collected ABNF</a></li>
    623          <li>C.&nbsp;&nbsp;&nbsp;<a href="#change.log">Change Log (to be removed by RFC Editor before publication)</a><ul>
    624                <li>C.1&nbsp;&nbsp;&nbsp;<a href="#changes.since.19">Since draft-ietf-httpbis-p4-conditional-19</a></li>
     623         <li>B.&nbsp;&nbsp;&nbsp;<a href="#imported.abnf">Imported ABNF</a></li>
     624         <li>C.&nbsp;&nbsp;&nbsp;<a href="#collected.abnf">Collected ABNF</a></li>
     625         <li>D.&nbsp;&nbsp;&nbsp;<a href="#change.log">Change Log (to be removed by RFC Editor before publication)</a><ul>
     626               <li>D.1&nbsp;&nbsp;&nbsp;<a href="#changes.since.19">Since draft-ietf-httpbis-p4-conditional-19</a></li>
    625627            </ul>
    626628         </li>
    … …  
    672674      </p>
    673675      <h2 id="rfc.section.1.2"><a href="#rfc.section.1.2">1.2</a>&nbsp;<a id="notation" href="#notation">Syntax Notation</a></h2>
    674       <p id="rfc.section.1.2.p.1">This specification uses the Augmented Backus-Naur Form (ABNF) notation of <a href="#RFC5234" id="rfc.xref.RFC5234.1"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a> with the list rule extension defined in <a href="p1-messaging.html#notation" title="Syntax Notation">Section 1.2</a> of <a href="#Part1" id="rfc.xref.Part1.3"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>. <a href="#collected.abnf" title="Collected ABNF">Appendix&nbsp;B</a> shows the collected ABNF with the list rule expanded.
    675       </p>
    676       <p id="rfc.section.1.2.p.2">The following core rules are included by reference, as defined in <a href="#RFC5234" id="rfc.xref.RFC5234.2"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a>, <a href="http://tools.ietf.org/html/rfc5234#appendix-B.1">Appendix B.1</a>: ALPHA (letters), CR (carriage return), CRLF (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double quote), HEXDIG
    677          (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any 8-bit sequence of data), SP (space), and VCHAR (any visible US-ASCII
    678          character).
    679       </p>
    680       <p id="rfc.section.1.2.p.3">The ABNF rules below are defined in <a href="#Part1" id="rfc.xref.Part1.4"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a> and <a href="#Part2" id="rfc.xref.Part2.2"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>:
    681       </p>
    682       <div id="rfc.figure.u.1"></div><pre class="inline">  <a href="#notation" class="smpl">OWS</a>           = &lt;OWS, defined in <a href="#Part1" id="rfc.xref.Part1.5"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>, <a href="p1-messaging.html#whitespace" title="Whitespace">Section 3.2.1</a>&gt;
    683   <a href="#notation" class="smpl">obs-text</a>      = &lt;obs-text, defined in <a href="#Part1" id="rfc.xref.Part1.6"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>, <a href="p1-messaging.html#field.components" title="Field value components">Section 3.2.4</a>&gt;
    684   <a href="#notation" class="smpl">HTTP-date</a>     = &lt;HTTP-date, defined in <a href="#Part2" id="rfc.xref.Part2.3"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>, <a href="p2-semantics.html#http.date" title="Date/Time Formats">Section 5.1</a>&gt;
    685 </pre><div id="rfc.iref.m.1"></div>
     676      <p id="rfc.section.1.2.p.1">This specification uses the Augmented Backus-Naur Form (ABNF) notation of <a href="#RFC5234" id="rfc.xref.RFC5234.1"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a> with the list rule extension defined in <a href="p1-messaging.html#notation" title="Syntax Notation">Section 1.2</a> of <a href="#Part1" id="rfc.xref.Part1.3"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>. <a href="#imported.abnf" title="Imported ABNF">Appendix&nbsp;B</a> describes rules imported from other documents. <a href="#collected.abnf" title="Collected ABNF">Appendix&nbsp;C</a> shows the collected ABNF with the list rule expanded.
     677      </p>
     678      <div id="rfc.iref.m.1"></div>
    686679      <div id="rfc.iref.v.1"></div>
    687680      <h1 id="rfc.section.2"><a href="#rfc.section.2">2.</a>&nbsp;<a id="validators" href="#validators">Validators</a></h1>
    … …  
    740733         was last modified.
    741734      </p>
    742       <div id="rfc.figure.u.2"></div><pre class="inline"><span id="rfc.iref.g.1"></span>  <a href="#header.last-modified" class="smpl">Last-Modified</a> = <a href="#notation" class="smpl">HTTP-date</a>
     735      <div id="rfc.figure.u.1"></div><pre class="inline"><span id="rfc.iref.g.1"></span>  <a href="#header.last-modified" class="smpl">Last-Modified</a> = <a href="#imported.abnf" class="smpl">HTTP-date</a>
    743736</pre><p id="rfc.section.2.2.p.3">An example of its use is</p>
    744       <div id="rfc.figure.u.3"></div><pre class="text">  Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT
     737      <div id="rfc.figure.u.2"></div><pre class="text">  Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT
    745738</pre><h3 id="rfc.section.2.2.1"><a href="#rfc.section.2.2.1">2.2.1</a>&nbsp;<a id="lastmod.generation" href="#lastmod.generation">Generation</a></h3>
    746739      <p id="rfc.section.2.2.1.p.1">Origin servers <em class="bcp14">SHOULD</em> send Last-Modified for any selected representation for which a last modification date can be reasonably and consistently determined,
    … …  
    802795         same time, or both. An entity-tag consists of an opaque quoted string, possibly prefixed by a weakness indicator.
    803796      </p>
    804       <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><span id="rfc.iref.g.5"></span><span id="rfc.iref.g.6"></span>  <a href="#header.etag" class="smpl">ETag</a>       = <a href="#header.etag" class="smpl">entity-tag</a>
     797      <div id="rfc.figure.u.3"></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><span id="rfc.iref.g.5"></span><span id="rfc.iref.g.6"></span>  <a href="#header.etag" class="smpl">ETag</a>       = <a href="#header.etag" class="smpl">entity-tag</a>
    805798
    806799  <a href="#header.etag" class="smpl">entity-tag</a> = [ <a href="#header.etag" class="smpl">weak</a> ] <a href="#header.etag" class="smpl">opaque-tag</a>
    807800  <a href="#header.etag" class="smpl">weak</a>       = %x57.2F ; "W/", case-sensitive
    808   <a href="#header.etag" class="smpl">opaque-tag</a> = <a href="#notation" class="smpl">DQUOTE</a> *<a href="#header.etag" class="smpl">etagc</a> <a href="#notation" class="smpl">DQUOTE</a>
    809   <a href="#header.etag" class="smpl">etagc</a>      = %x21 / %x23-7E / <a href="#notation" class="smpl">obs-text</a>
    810              ; <a href="#notation" class="smpl">VCHAR</a> except double quotes, plus obs-text
     801  <a href="#header.etag" class="smpl">opaque-tag</a> = <a href="#imported.abnf" class="smpl">DQUOTE</a> *<a href="#header.etag" class="smpl">etagc</a> <a href="#imported.abnf" class="smpl">DQUOTE</a>
     802  <a href="#header.etag" class="smpl">etagc</a>      = %x21 / %x23-7E / <a href="#imported.abnf" class="smpl">obs-text</a>
     803             ; <a href="#imported.abnf" class="smpl">VCHAR</a> except double quotes, plus obs-text
    811804</pre><div class="note" id="rfc.section.2.3.p.3">
    812805         <p> <b>Note:</b> Previously, opaque-tag was defined to be a quoted-string (<a href="#RFC2616" id="rfc.xref.RFC2616.1"><cite title="Hypertext Transfer Protocol -- HTTP/1.1">[RFC2616]</cite></a>, <a href="http://tools.ietf.org/html/rfc2616#section-3.11">Section 3.11</a>), thus some recipients might perform backslash unescaping. Servers therefore ought to avoid backslash characters in entity
    … …  
    818811         not consistently maintained.
    819812      </p>
    820       <div id="rfc.figure.u.5"></div>
     813      <div id="rfc.figure.u.4"></div>
    821814      <p>Examples:</p>  <pre class="text">  ETag: "xyzzy"
    822815  ETag: W/"xyzzy"
    … …  
    890883      </div>
    891884      <h3 id="rfc.section.2.3.3"><a href="#rfc.section.2.3.3">2.3.3</a>&nbsp;<a id="example.entity.tag.vs.conneg" href="#example.entity.tag.vs.conneg">Example: Entity-tags varying on Content-Negotiated Resources</a></h3>
    892       <p id="rfc.section.2.3.3.p.1">Consider a resource that is subject to content negotiation (<a href="p2-semantics.html#content.negotiation" title="Content Negotiation">Section 8</a> of <a href="#Part2" id="rfc.xref.Part2.4"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>), and where the representations returned upon a GET request vary based on the <a href="p2-semantics.html#header.accept-encoding" class="smpl">Accept-Encoding</a> request header field (<a href="p2-semantics.html#header.accept-encoding" title="Accept-Encoding">Section 9.3</a> of <a href="#Part2" id="rfc.xref.Part2.5"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>):
    893       </p>
    894       <div id="rfc.figure.u.6"></div>
     885      <p id="rfc.section.2.3.3.p.1">Consider a resource that is subject to content negotiation (<a href="p2-semantics.html#content.negotiation" title="Content Negotiation">Section 8</a> of <a href="#Part2" id="rfc.xref.Part2.2"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>), and where the representations returned upon a GET request vary based on the <a href="p2-semantics.html#header.accept-encoding" class="smpl">Accept-Encoding</a> request header field (<a href="p2-semantics.html#header.accept-encoding" title="Accept-Encoding">Section 9.3</a> of <a href="#Part2" id="rfc.xref.Part2.3"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>):
     886      </p>
     887      <div id="rfc.figure.u.5"></div>
    895888      <p>&gt;&gt; Request:</p><pre class="text2">GET /index HTTP/1.1
    896889Host: www.example.com
    … …  
    898891
    899892</pre><p id="rfc.section.2.3.3.p.3">In this case, the response might or might not use the gzip content coding. If it does not, the response might look like:</p>
    900       <div id="rfc.figure.u.7"></div>
     893      <div id="rfc.figure.u.6"></div>
    901894      <p>&gt;&gt; Response:</p><pre class="text">HTTP/1.1 200 OK
    902895Date: Thu, 26 Mar 2010 00:05:00 GMT
    … …  
    912905Hello World!
    913906</span></pre><p id="rfc.section.2.3.3.p.5">An alternative representation that does use gzip content coding would be:</p>
    914       <div id="rfc.figure.u.8"></div>
     907      <div id="rfc.figure.u.7"></div>
    915908      <p>&gt;&gt; Response:</p><pre class="text">HTTP/1.1 200 OK
    916909Date: Thu, 26 Mar 2010 00:05:00 GMT
    … …  
    924917         <p> <b>Note:</b> Content codings are a property of the representation, so therefore an entity-tag of an encoded representation has to be distinct
    925918            from an unencoded representation to prevent conflicts during cache updates and range requests. In contrast, transfer codings
    926             (<a href="p1-messaging.html#transfer.codings" title="Transfer Codings">Section 4</a> of <a href="#Part1" id="rfc.xref.Part1.7"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>) apply only during message transfer and do not require distinct entity-tags.
     919            (<a href="p1-messaging.html#transfer.codings" title="Transfer Codings">Section 4</a> of <a href="#Part1" id="rfc.xref.Part1.4"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>) apply only during message transfer and do not require distinct entity-tags.
    927920         </p>
    928921      </div>
    … …  
    982975         field-value of "*" places the precondition on the existence of any current representation for the target resource.
    983976      </p>
    984       <div id="rfc.figure.u.9"></div><pre class="inline"><span id="rfc.iref.g.7"></span>  <a href="#header.if-match" class="smpl">If-Match</a> = "*" / 1#<a href="#header.etag" class="smpl">entity-tag</a>
     977      <div id="rfc.figure.u.8"></div><pre class="inline"><span id="rfc.iref.g.7"></span>  <a href="#header.if-match" class="smpl">If-Match</a> = "*" / 1#<a href="#header.etag" class="smpl">entity-tag</a>
    985978</pre><p id="rfc.section.3.1.p.4">The If-Match condition is met if and only if any of the entity-tags listed in the If-Match field value match the entity-tag
    986979         of the selected representation for the target resource (as per <a href="#entity.tag.comparison" title="Comparison">Section&nbsp;2.3.2</a>), or if "*" is given and any current representation exists for the target resource.
    … …  
    996989      </p>
    997990      <p id="rfc.section.3.1.p.9">Examples:</p>
    998       <div id="rfc.figure.u.10"></div><pre class="text">  If-Match: "xyzzy"
     991      <div id="rfc.figure.u.9"></div><pre class="text">  If-Match: "xyzzy"
    999992  If-Match: "xyzzy", "r2d2xxxx", "c3piozzzz"
    1000993  If-Match: *
    … …  
    10151008         for the target resource.
    10161009      </p>
    1017       <div id="rfc.figure.u.11"></div><pre class="inline"><span id="rfc.iref.g.8"></span>  <a href="#header.if-none-match" class="smpl">If-None-Match</a> = "*" / 1#<a href="#header.etag" class="smpl">entity-tag</a>
     1010      <div id="rfc.figure.u.10"></div><pre class="inline"><span id="rfc.iref.g.8"></span>  <a href="#header.if-none-match" class="smpl">If-None-Match</a> = "*" / 1#<a href="#header.etag" class="smpl">entity-tag</a>
    10181011</pre><p id="rfc.section.3.2.p.5">The If-None-Match condition is met if and only if none of the entity-tags listed in the If-None-Match field value match the
    10191012         entity-tag of the selected representation for the target resource (as per <a href="#entity.tag.comparison" title="Comparison">Section&nbsp;2.3.2</a>), or if "*" is given and no current representation exists for that resource.
    … …  
    10281021      </p>
    10291022      <p id="rfc.section.3.2.p.9">Examples:</p>
    1030       <div id="rfc.figure.u.12"></div><pre class="text">  If-None-Match: "xyzzy"
     1023      <div id="rfc.figure.u.11"></div><pre class="text">  If-None-Match: "xyzzy"
    10311024  If-None-Match: W/"xyzzy"
    10321025  If-None-Match: "xyzzy", "r2d2xxxx", "c3piozzzz"
    … …  
    10401033         method; instead, respond as detailed below.
    10411034      </p>
    1042       <div id="rfc.figure.u.13"></div><pre class="inline"><span id="rfc.iref.g.9"></span>  <a href="#header.if-modified-since" class="smpl">If-Modified-Since</a> = <a href="#notation" class="smpl">HTTP-date</a>
     1035      <div id="rfc.figure.u.12"></div><pre class="inline"><span id="rfc.iref.g.9"></span>  <a href="#header.if-modified-since" class="smpl">If-Modified-Since</a> = <a href="#imported.abnf" class="smpl">HTTP-date</a>
    10431036</pre><p id="rfc.section.3.3.p.3">An example of the field is:</p>
    1044       <div id="rfc.figure.u.14"></div><pre class="text">  If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT
     1037      <div id="rfc.figure.u.13"></div><pre class="text">  If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT
    10451038</pre><p id="rfc.section.3.3.p.5">A GET method with an If-Modified-Since header field and no <a href="p5-range.html#range.retrieval.requests" class="smpl">Range</a> header field requests that the selected representation be transferred only if it has been modified since the date given by
    10461039         the If-Modified-Since header field. The algorithm for determining this includes the following cases:
    … …  
    10801073         representation has been modified since the time specified in this field, then the server <em class="bcp14">MUST NOT</em> perform the requested operation and <em class="bcp14">MUST</em> instead respond with the <a href="#status.412" class="smpl">412 (Precondition Failed)</a> status code. If the selected representation has not been modified since the time specified in this field, the server <em class="bcp14">SHOULD</em> perform the request method as if the If-Unmodified-Since header field were not present.
    10811074      </p>
    1082       <div id="rfc.figure.u.15"></div><pre class="inline"><span id="rfc.iref.g.10"></span>  <a href="#header.if-unmodified-since" class="smpl">If-Unmodified-Since</a> = <a href="#notation" class="smpl">HTTP-date</a>
     1075      <div id="rfc.figure.u.14"></div><pre class="inline"><span id="rfc.iref.g.10"></span>  <a href="#header.if-unmodified-since" class="smpl">If-Unmodified-Since</a> = <a href="#imported.abnf" class="smpl">HTTP-date</a>
    10831076</pre><p id="rfc.section.3.4.p.3">An example of the field is:</p>
    1084       <div id="rfc.figure.u.16"></div><pre class="text">  If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT
     1077      <div id="rfc.figure.u.15"></div><pre class="text">  If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT
    10851078</pre><p id="rfc.section.3.4.p.5">If a request normally (i.e., in absence of the If-Unmodified-Since header field) would result in anything other than a <a href="p2-semantics.html#status.2xx" class="smpl">2xx (Successful)</a> or <a href="#status.412" class="smpl">412 (Precondition Failed)</a> status code, the If-Unmodified-Since header field <em class="bcp14">SHOULD</em> be ignored.
    10861079      </p>
    … …  
    10991092         as if it were the payload of a 200 response. The 304 response <em class="bcp14">MUST NOT</em> contain a message-body, and thus is always terminated by the first empty line after the header fields.
    11001093      </p>
    1101       <p id="rfc.section.4.1.p.2">A 304 response <em class="bcp14">MUST</em> include a <a href="p2-semantics.html#header.date" class="smpl">Date</a> header field (<a href="p2-semantics.html#header.date" title="Date">Section 9.10</a> of <a href="#Part2" id="rfc.xref.Part2.6"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>) unless the origin server does not have a clock that can provide a reasonable approximation of the current time. If a <a href="p2-semantics.html#status.200" class="smpl">200
     1094      <p id="rfc.section.4.1.p.2">A 304 response <em class="bcp14">MUST</em> include a <a href="p2-semantics.html#header.date" class="smpl">Date</a> header field (<a href="p2-semantics.html#header.date" title="Date">Section 9.10</a> of <a href="#Part2" id="rfc.xref.Part2.4"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>) unless the origin server does not have a clock that can provide a reasonable approximation of the current time. If a <a href="p2-semantics.html#status.200" class="smpl">200
    11021095            (OK)</a> response to the same request would have included any of the header fields <a href="p6-cache.html#header.cache-control" class="smpl">Cache-Control</a>, <a href="p2-semantics.html#header.content-location" class="smpl">Content-Location</a>, <a href="#header.etag" class="smpl">ETag</a>, <a href="p6-cache.html#header.expires" class="smpl">Expires</a>, or <a href="p6-cache.html#header.vary" class="smpl">Vary</a>, then those same header fields <em class="bcp14">MUST</em> be sent in a 304 response.
    11031096      </p>
    … …  
    12581251      <p id="rfc.section.6.2.p.2">The change controller is: "IETF (iesg@ietf.org) - Internet Engineering Task Force".</p>
    12591252      <h1 id="rfc.section.7"><a href="#rfc.section.7">7.</a>&nbsp;<a id="security.considerations" href="#security.considerations">Security Considerations</a></h1>
    1260       <p id="rfc.section.7.p.1">No additional security considerations have been identified beyond those applicable to HTTP in general <a href="#Part1" id="rfc.xref.Part1.8"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>.
     1253      <p id="rfc.section.7.p.1">No additional security considerations have been identified beyond those applicable to HTTP in general <a href="#Part1" id="rfc.xref.Part1.5"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>.
    12611254      </p>
    12621255      <p id="rfc.section.7.p.2">The validators defined by this specification are not intended to ensure the validity of a representation, guard against malicious
    … …  
    12661259      </p>
    12671260      <h1 id="rfc.section.8"><a href="#rfc.section.8">8.</a>&nbsp;<a id="acks" href="#acks">Acknowledgments</a></h1>
    1268       <p id="rfc.section.8.p.1">See <a href="p1-messaging.html#acks" title="Acknowledgments">Section 9</a> of <a href="#Part1" id="rfc.xref.Part1.9"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>.
     1261      <p id="rfc.section.8.p.1">See <a href="p1-messaging.html#acks" title="Acknowledgments">Section 9</a> of <a href="#Part1" id="rfc.xref.Part1.6"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>.
    12691262      </p>
    12701263      <h1 id="rfc.references"><a id="rfc.section.9" href="#rfc.section.9">9.</a> References
    … …  
    13421335      <p id="rfc.section.A.p.3">Change ABNF productions for header fields to only define the field value. (<a href="#header.field.definitions" title="Precondition Header Fields">Section&nbsp;3</a>)
    13431336      </p>
    1344       <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a>&nbsp;<a id="collected.abnf" href="#collected.abnf">Collected ABNF</a></h1>
    1345       <div id="rfc.figure.u.17"></div> <pre class="inline"><a href="#header.etag" class="smpl">ETag</a> = entity-tag
    1346 
    1347 <a href="#notation" class="smpl">HTTP-date</a> = &lt;HTTP-date, defined in [Part2], Section 5.1&gt;
     1337      <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a>&nbsp;<a id="imported.abnf" href="#imported.abnf">Imported ABNF</a></h1>
     1338      <p id="rfc.section.B.p.1">The following core rules are included by reference, as defined in <a href="#RFC5234" id="rfc.xref.RFC5234.2"><cite title="Augmented BNF for Syntax Specifications: ABNF">[RFC5234]</cite></a>, <a href="http://tools.ietf.org/html/rfc5234#appendix-B.1">Appendix B.1</a>: ALPHA (letters), CR (carriage return), CRLF (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double quote), HEXDIG
     1339         (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any 8-bit sequence of data), SP (space), and VCHAR (any visible US-ASCII
     1340         character).
     1341      </p>
     1342      <p id="rfc.section.B.p.2">The rules below are defined in <a href="#Part1" id="rfc.xref.Part1.7"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>:
     1343      </p>
     1344      <div id="rfc.figure.u.16"></div><pre class="inline">  <a href="#imported.abnf" class="smpl">OWS</a>           = &lt;OWS, defined in <a href="#Part1" id="rfc.xref.Part1.8"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>, <a href="p1-messaging.html#whitespace" title="Whitespace">Section 3.2.1</a>&gt;
     1345  <a href="#imported.abnf" class="smpl">obs-text</a>      = &lt;obs-text, defined in <a href="#Part1" id="rfc.xref.Part1.9"><cite title="HTTP/1.1, part 1: Message Routing and Syntax&#34;">[Part1]</cite></a>, <a href="p1-messaging.html#field.components" title="Field value components">Section 3.2.4</a>&gt;
     1346</pre><p id="rfc.section.B.p.4">The rules below are defined in other parts:</p>
     1347      <div id="rfc.figure.u.17"></div><pre class="inline">  <a href="#imported.abnf" class="smpl">HTTP-date</a>     = &lt;HTTP-date, defined in <a href="#Part2" id="rfc.xref.Part2.5"><cite title="HTTP/1.1, part 2: Semantics and Payloads">[Part2]</cite></a>, <a href="p2-semantics.html#http.date" title="Date/Time Formats">Section 5.1</a>&gt;
     1348</pre><h1 id="rfc.section.C"><a href="#rfc.section.C">C.</a>&nbsp;<a id="collected.abnf" href="#collected.abnf">Collected ABNF</a></h1>
     1349      <div id="rfc.figure.u.18"></div> <pre class="inline"><a href="#header.etag" class="smpl">ETag</a> = entity-tag
     1350
     1351<a href="#imported.abnf" class="smpl">HTTP-date</a> = &lt;HTTP-date, defined in [Part2], Section 5.1&gt;
    13481352
    13491353<a href="#header.if-match" class="smpl">If-Match</a> = "*" / ( *( "," OWS ) entity-tag *( OWS "," [ OWS
    … …  
    13561360<a href="#header.last-modified" class="smpl">Last-Modified</a> = HTTP-date
    13571361
    1358 <a href="#notation" class="smpl">OWS</a> = &lt;OWS, defined in [Part1], Section 3.2.1&gt;
     1362<a href="#imported.abnf" class="smpl">OWS</a> = &lt;OWS, defined in [Part1], Section 3.2.1&gt;
    13591363
    13601364<a href="#header.etag" class="smpl">entity-tag</a> = [ weak ] opaque-tag
    … …  
    13621366 / obs-text
    13631367
    1364 <a href="#notation" class="smpl">obs-text</a> = &lt;obs-text, defined in [Part1], Section 3.2.4&gt;
     1368<a href="#imported.abnf" class="smpl">obs-text</a> = &lt;obs-text, defined in [Part1], Section 3.2.4&gt;
    13651369<a href="#header.etag" class="smpl">opaque-tag</a> = DQUOTE *etagc DQUOTE
    13661370
    13671371<a href="#header.etag" class="smpl">weak</a> = %x57.2F ; W/
    1368 </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>
    1369       <p id="rfc.section.C.p.1">Changes up to the first Working Group Last Call draft are summarized in &lt;<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-19#appendix-C">http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-19#appendix-C</a>&gt;.
    1370       </p>
    1371       <h2 id="rfc.section.C.1"><a href="#rfc.section.C.1">C.1</a>&nbsp;<a id="changes.since.19" href="#changes.since.19">Since draft-ietf-httpbis-p4-conditional-19</a></h2>
    1372       <p id="rfc.section.C.1.p.1">Closed issues: </p>
     1372</pre> <h1 id="rfc.section.D"><a href="#rfc.section.D">D.</a>&nbsp;<a id="change.log" href="#change.log">Change Log (to be removed by RFC Editor before publication)</a></h1>
     1373      <p id="rfc.section.D.p.1">Changes up to the first Working Group Last Call draft are summarized in &lt;<a href="http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-19#appendix-C">http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-19#appendix-C</a>&gt;.
     1374      </p>
     1375      <h2 id="rfc.section.D.1"><a href="#rfc.section.D.1">D.1</a>&nbsp;<a id="changes.since.19" href="#changes.since.19">Since draft-ietf-httpbis-p4-conditional-19</a></h2>
     1376      <p id="rfc.section.D.1.p.1">Closed issues: </p>
    13731377      <ul>
    13741378         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/241">http://tools.ietf.org/wg/httpbis/trac/ticket/241</a>&gt;: "Need to clarify eval order/interaction of conditional headers"
    … …  
    14501454            </li>
    14511455            <li><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul>
    1452                   <li><em>Part1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.1">1</a>, <a href="#rfc.xref.Part1.2">1.1</a>, <a href="#rfc.xref.Part1.3">1.2</a>, <a href="#rfc.xref.Part1.4">1.2</a>, <a href="#rfc.xref.Part1.5">1.2</a>, <a href="#rfc.xref.Part1.6">1.2</a>, <a href="#rfc.xref.Part1.7">2.3.3</a>, <a href="#rfc.xref.Part1.8">7</a>, <a href="#rfc.xref.Part1.9">8</a>, <a href="#Part1"><b>9.1</b></a><ul>
     1456                  <li><em>Part1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.1">1</a>, <a href="#rfc.xref.Part1.2">1.1</a>, <a href="#rfc.xref.Part1.3">1.2</a>, <a href="#rfc.xref.Part1.4">2.3.3</a>, <a href="#rfc.xref.Part1.5">7</a>, <a href="#rfc.xref.Part1.6">8</a>, <a href="#Part1"><b>9.1</b></a>, <a href="#rfc.xref.Part1.7">B</a>, <a href="#rfc.xref.Part1.8">B</a>, <a href="#rfc.xref.Part1.9">B</a><ul>
    14531457                        <li><em>Section 1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.3">1.2</a></li>
    14541458                        <li><em>Section 2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.2">1.1</a></li>
    1455                         <li><em>Section 3.2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.5">1.2</a></li>
    1456                         <li><em>Section 3.2.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.6">1.2</a></li>
    1457                         <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.7">2.3.3</a></li>
    1458                         <li><em>Section 9</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.9">8</a></li>
     1459                        <li><em>Section 3.2.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.8">B</a></li>
     1460                        <li><em>Section 3.2.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.9">B</a></li>
     1461                        <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.4">2.3.3</a></li>
     1462                        <li><em>Section 9</em>&nbsp;&nbsp;<a href="#rfc.xref.Part1.6">8</a></li>
    14591463                     </ul>
    14601464                  </li>
    1461                   <li><em>Part2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">1</a>, <a href="#rfc.xref.Part2.2">1.2</a>, <a href="#rfc.xref.Part2.3">1.2</a>, <a href="#rfc.xref.Part2.4">2.3.3</a>, <a href="#rfc.xref.Part2.5">2.3.3</a>, <a href="#rfc.xref.Part2.6">4.1</a>, <a href="#Part2"><b>9.1</b></a><ul>
    1462                         <li><em>Section 5.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.3">1.2</a></li>
    1463                         <li><em>Section 8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.4">2.3.3</a></li>
    1464                         <li><em>Section 9.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.5">2.3.3</a></li>
    1465                         <li><em>Section 9.10</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.6">4.1</a></li>
     1465                  <li><em>Part2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">1</a>, <a href="#rfc.xref.Part2.2">2.3.3</a>, <a href="#rfc.xref.Part2.3">2.3.3</a>, <a href="#rfc.xref.Part2.4">4.1</a>, <a href="#Part2"><b>9.1</b></a>, <a href="#rfc.xref.Part2.5">B</a><ul>
     1466                        <li><em>Section 5.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.5">B</a></li>
     1467                        <li><em>Section 8</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.2">2.3.3</a></li>
     1468                        <li><em>Section 9.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.3">2.3.3</a></li>
     1469                        <li><em>Section 9.10</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.4">4.1</a></li>
    14661470                     </ul>
    14671471                  </li>
    … …  
    14821486                  <li><em>RFC3864</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC3864.1">6.2</a>, <a href="#RFC3864"><b>9.2</b></a></li>
    14831487                  <li><em>RFC4918</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC4918.1">2</a>, <a href="#RFC4918"><b>9.2</b></a></li>
    1484                   <li><em>RFC5234</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.1">1.2</a>, <a href="#rfc.xref.RFC5234.2">1.2</a>, <a href="#RFC5234"><b>9.1</b></a><ul>
    1485                         <li><em>Appendix B.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.2">1.2</a></li>
     1488                  <li><em>RFC5234</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.1">1.2</a>, <a href="#RFC5234"><b>9.1</b></a>, <a href="#rfc.xref.RFC5234.2">B</a><ul>
     1489                        <li><em>Appendix B.1</em>&nbsp;&nbsp;<a href="#rfc.xref.RFC5234.2">B</a></li>
    14861490                     </ul>
    14871491                  </li>
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