source: draft-ietf-httpbis/diffs/draft-ietf-httpbis-p4-conditional-08-from-7.diff.html @ 1391

Last change on this file since 1391 was 719, checked in by julian.reschke@…, 10 years ago

Prepare for -08 drafts

  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/html; charset=iso-8859-1
File size: 127.6 KB
Line 
1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
2<!-- Generated by rfcdiff 1.35: rfcdiff  --> 
3<!-- <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional" > -->
4<html> 
5<head> 
6  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> 
7  <meta http-equiv="Content-Style-Type" content="text/css" /> 
8  <title>Diff: draft-ietf-httpbis-p4-conditional-07.txt - draft-ietf-httpbis-p4-conditional-08.txt</title> 
9  <style type="text/css"> 
10    body    { margin: 0.4ex; margin-right: auto; } 
11    tr      { } 
12    td      { white-space: pre; font-family: monospace; vertical-align: top; font-size: 0.86em;} 
13    th      { font-size: 0.86em; } 
14    .small  { font-size: 0.6em; font-style: italic; font-family: Verdana, Helvetica, sans-serif; } 
15    .left   { background-color: #EEE; } 
16    .right  { background-color: #FFF; } 
17    .diff   { background-color: #CCF; } 
18    .lblock { background-color: #BFB; } 
19    .rblock { background-color: #FF8; } 
20    .insert { background-color: #8FF; } 
21    .delete { background-color: #ACF; } 
22    .void   { background-color: #FFB; } 
23    .cont   { background-color: #EEE; } 
24    .linebr { background-color: #AAA; } 
25    .lineno { color: red; background-color: #FFF; font-size: 0.7em; text-align: right; padding: 0 2px; } 
26    .elipsis{ background-color: #AAA; } 
27    .left .cont { background-color: #DDD; } 
28    .right .cont { background-color: #EEE; } 
29    .lblock .cont { background-color: #9D9; } 
30    .rblock .cont { background-color: #DD6; } 
31    .insert .cont { background-color: #0DD; } 
32    .delete .cont { background-color: #8AD; } 
33    .stats, .stats td, .stats th { background-color: #EEE; padding: 2px 0; } 
34  </style> 
35</head> 
36<body > 
37  <table border="0" cellpadding="0" cellspacing="0"> 
38  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p4-conditional-07.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p4-conditional-08.txt&nbsp;</th><th></th></tr> 
39      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
40      <tr><td class="lineno" valign="top"></td><td class="left">HTTPbis Working Group                                   R. Fielding, Ed.</td><td> </td><td class="right">HTTPbis Working Group                                   R. Fielding, Ed.</td><td class="lineno" valign="top"></td></tr>
41      <tr><td class="lineno" valign="top"></td><td class="left">Internet-Draft                                              Day Software</td><td> </td><td class="right">Internet-Draft                                              Day Software</td><td class="lineno" valign="top"></td></tr>
42      <tr><td class="lineno" valign="top"></td><td class="left">Obsoletes: 2616 (if approved)                                  J. Gettys</td><td> </td><td class="right">Obsoletes: 2616 (if approved)                                  J. Gettys</td><td class="lineno" valign="top"></td></tr>
43      <tr><td class="lineno" valign="top"></td><td class="left">Intended status: Standards Track                    One Laptop per Child</td><td> </td><td class="right">Intended status: Standards Track                    One Laptop per Child</td><td class="lineno" valign="top"></td></tr>
44      <tr><td><a name="diff0001" /></td></tr>
45      <tr><td class="lineno" valign="top"></td><td class="lblock">Expires: <span class="delete">January 14, 2010</span>                                       J. Mogul</td><td> </td><td class="rblock">Expires: <span class="insert">April 29, 2010  </span>                                       J. Mogul</td><td class="lineno" valign="top"></td></tr>
46      <tr><td class="lineno" valign="top"></td><td class="left">                                                                      HP</td><td> </td><td class="right">                                                                      HP</td><td class="lineno" valign="top"></td></tr>
47      <tr><td class="lineno" valign="top"></td><td class="left">                                                              H. Frystyk</td><td> </td><td class="right">                                                              H. Frystyk</td><td class="lineno" valign="top"></td></tr>
48      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
49      <tr><td class="lineno" valign="top"></td><td class="left">                                                             L. Masinter</td><td> </td><td class="right">                                                             L. Masinter</td><td class="lineno" valign="top"></td></tr>
50      <tr><td class="lineno" valign="top"></td><td class="left">                                                           Adobe Systems</td><td> </td><td class="right">                                                           Adobe Systems</td><td class="lineno" valign="top"></td></tr>
51      <tr><td class="lineno" valign="top"></td><td class="left">                                                                P. Leach</td><td> </td><td class="right">                                                                P. Leach</td><td class="lineno" valign="top"></td></tr>
52      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
53      <tr><td class="lineno" valign="top"></td><td class="left">                                                          T. Berners-Lee</td><td> </td><td class="right">                                                          T. Berners-Lee</td><td class="lineno" valign="top"></td></tr>
54      <tr><td class="lineno" valign="top"></td><td class="left">                                                                 W3C/MIT</td><td> </td><td class="right">                                                                 W3C/MIT</td><td class="lineno" valign="top"></td></tr>
55      <tr><td class="lineno" valign="top"></td><td class="left">                                                           Y. Lafon, Ed.</td><td> </td><td class="right">                                                           Y. Lafon, Ed.</td><td class="lineno" valign="top"></td></tr>
56      <tr><td class="lineno" valign="top"></td><td class="left">                                                                     W3C</td><td> </td><td class="right">                                                                     W3C</td><td class="lineno" valign="top"></td></tr>
57      <tr><td class="lineno" valign="top"></td><td class="left">                                                         J. Reschke, Ed.</td><td> </td><td class="right">                                                         J. Reschke, Ed.</td><td class="lineno" valign="top"></td></tr>
58      <tr><td class="lineno" valign="top"></td><td class="left">                                                              greenbytes</td><td> </td><td class="right">                                                              greenbytes</td><td class="lineno" valign="top"></td></tr>
59      <tr><td><a name="diff0002" /></td></tr>
60      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                        <span class="delete">   July 13</span>, 2009</td><td> </td><td class="rblock">                                                        <span class="insert">October 26</span>, 2009</td><td class="lineno" valign="top"></td></tr>
61      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
62      <tr><td class="lineno" valign="top"></td><td class="left">                 HTTP/1.1, part 4: Conditional Requests</td><td> </td><td class="right">                 HTTP/1.1, part 4: Conditional Requests</td><td class="lineno" valign="top"></td></tr>
63      <tr><td><a name="diff0003" /></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="lblock">                  draft-ietf-httpbis-p4-conditional-0<span class="delete">7</span></td><td> </td><td class="rblock">                  draft-ietf-httpbis-p4-conditional-0<span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
65      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
66      <tr><td class="lineno" valign="top"></td><td class="left">Status of this Memo</td><td> </td><td class="right">Status of this Memo</td><td class="lineno" valign="top"></td></tr>
67      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
68      <tr><td class="lineno" valign="top"></td><td class="left">   This Internet-Draft is submitted to IETF in full conformance with the</td><td> </td><td class="right">   This Internet-Draft is submitted to IETF in full conformance with the</td><td class="lineno" valign="top"></td></tr>
69      <tr><td class="lineno" valign="top"></td><td class="left">   provisions of BCP 78 and BCP 79.  This document may contain material</td><td> </td><td class="right">   provisions of BCP 78 and BCP 79.  This document may contain material</td><td class="lineno" valign="top"></td></tr>
70      <tr><td class="lineno" valign="top"></td><td class="left">   from IETF Documents or IETF Contributions published or made publicly</td><td> </td><td class="right">   from IETF Documents or IETF Contributions published or made publicly</td><td class="lineno" valign="top"></td></tr>
71      <tr><td class="lineno" valign="top"></td><td class="left">   available before November 10, 2008.  The person(s) controlling the</td><td> </td><td class="right">   available before November 10, 2008.  The person(s) controlling the</td><td class="lineno" valign="top"></td></tr>
72      <tr><td class="lineno" valign="top"></td><td class="left">   copyright in some of this material may not have granted the IETF</td><td> </td><td class="right">   copyright in some of this material may not have granted the IETF</td><td class="lineno" valign="top"></td></tr>
73      <tr><td class="lineno" valign="top"></td><td class="left">   Trust the right to allow modifications of such material outside the</td><td> </td><td class="right">   Trust the right to allow modifications of such material outside the</td><td class="lineno" valign="top"></td></tr>
74      <tr><td class="lineno" valign="top"></td><td class="left">   IETF Standards Process.  Without obtaining an adequate license from</td><td> </td><td class="right">   IETF Standards Process.  Without obtaining an adequate license from</td><td class="lineno" valign="top"></td></tr>
75      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
76      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 2, line 10</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 2, line 10</em></th><td></td></tr>
77      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are draft documents valid for a maximum of six months</td><td> </td><td class="right">   Internet-Drafts are draft documents valid for a maximum of six months</td><td class="lineno" valign="top"></td></tr>
78      <tr><td class="lineno" valign="top"></td><td class="left">   and may be updated, replaced, or obsoleted by other documents at any</td><td> </td><td class="right">   and may be updated, replaced, or obsoleted by other documents at any</td><td class="lineno" valign="top"></td></tr>
79      <tr><td class="lineno" valign="top"></td><td class="left">   time.  It is inappropriate to use Internet-Drafts as reference</td><td> </td><td class="right">   time.  It is inappropriate to use Internet-Drafts as reference</td><td class="lineno" valign="top"></td></tr>
80      <tr><td class="lineno" valign="top"></td><td class="left">   material or to cite them other than as "work in progress."</td><td> </td><td class="right">   material or to cite them other than as "work in progress."</td><td class="lineno" valign="top"></td></tr>
81      <tr><td class="lineno" valign="top"></td><td class="left">   The list of current Internet-Drafts can be accessed at</td><td> </td><td class="right">   The list of current Internet-Drafts can be accessed at</td><td class="lineno" valign="top"></td></tr>
82      <tr><td class="lineno" valign="top"></td><td class="left">   http://www.ietf.org/ietf/1id-abstracts.txt.</td><td> </td><td class="right">   http://www.ietf.org/ietf/1id-abstracts.txt.</td><td class="lineno" valign="top"></td></tr>
83      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
84      <tr><td class="lineno" valign="top"></td><td class="left">   The list of Internet-Draft Shadow Directories can be accessed at</td><td> </td><td class="right">   The list of Internet-Draft Shadow Directories can be accessed at</td><td class="lineno" valign="top"></td></tr>
85      <tr><td class="lineno" valign="top"></td><td class="left">   http://www.ietf.org/shadow.html.</td><td> </td><td class="right">   http://www.ietf.org/shadow.html.</td><td class="lineno" valign="top"></td></tr>
86      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
87      <tr><td><a name="diff0004" /></td></tr>
88      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on <span class="delete">January 14</span>, 2010.</td><td> </td><td class="rblock">   This Internet-Draft will expire on <span class="insert">April 29</span>, 2010.</td><td class="lineno" valign="top"></td></tr>
89      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
90      <tr><td class="lineno" valign="top"></td><td class="left">Copyright Notice</td><td> </td><td class="right">Copyright Notice</td><td class="lineno" valign="top"></td></tr>
91      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
92      <tr><td class="lineno" valign="top"></td><td class="left">   Copyright (c) 2009 IETF Trust and the persons identified as the</td><td> </td><td class="right">   Copyright (c) 2009 IETF Trust and the persons identified as the</td><td class="lineno" valign="top"></td></tr>
93      <tr><td class="lineno" valign="top"></td><td class="left">   document authors.  All rights reserved.</td><td> </td><td class="right">   document authors.  All rights reserved.</td><td class="lineno" valign="top"></td></tr>
94      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
95      <tr><td class="lineno" valign="top"></td><td class="left">   This document is subject to BCP 78 and the IETF Trust's Legal</td><td> </td><td class="right">   This document is subject to BCP 78 and the IETF Trust's Legal</td><td class="lineno" valign="top"></td></tr>
96      <tr><td class="lineno" valign="top"></td><td class="left">   Provisions Relating to IETF Documents in effect on the date of</td><td> </td><td class="right">   Provisions Relating to IETF Documents in effect on the date of</td><td class="lineno" valign="top"></td></tr>
97      <tr><td class="lineno" valign="top"></td><td class="left">   publication of this document (http://trustee.ietf.org/license-info).</td><td> </td><td class="right">   publication of this document (http://trustee.ietf.org/license-info).</td><td class="lineno" valign="top"></td></tr>
98      <tr><td class="lineno" valign="top"></td><td class="left">   Please review these documents carefully, as they describe your rights</td><td> </td><td class="right">   Please review these documents carefully, as they describe your rights</td><td class="lineno" valign="top"></td></tr>
99      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
100      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 2, line 42</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 2, line 42</em></th><td></td></tr>
101      <tr><td class="lineno" valign="top"></td><td class="left">   rules for constructing responses to those requests.</td><td> </td><td class="right">   rules for constructing responses to those requests.</td><td class="lineno" valign="top"></td></tr>
102      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
103      <tr><td class="lineno" valign="top"></td><td class="left">Editorial Note (To be removed by RFC Editor)</td><td> </td><td class="right">Editorial Note (To be removed by RFC Editor)</td><td class="lineno" valign="top"></td></tr>
104      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
105      <tr><td class="lineno" valign="top"></td><td class="left">   Discussion of this draft should take place on the HTTPBIS working</td><td> </td><td class="right">   Discussion of this draft should take place on the HTTPBIS working</td><td class="lineno" valign="top"></td></tr>
106      <tr><td class="lineno" valign="top"></td><td class="left">   group mailing list (ietf-http-wg@w3.org).  The current issues list is</td><td> </td><td class="right">   group mailing list (ietf-http-wg@w3.org).  The current issues list is</td><td class="lineno" valign="top"></td></tr>
107      <tr><td class="lineno" valign="top"></td><td class="left">   at &lt;http://tools.ietf.org/wg/httpbis/trac/report/11&gt; and related</td><td> </td><td class="right">   at &lt;http://tools.ietf.org/wg/httpbis/trac/report/11&gt; and related</td><td class="lineno" valign="top"></td></tr>
108      <tr><td class="lineno" valign="top"></td><td class="left">   documents (including fancy diffs) can be found at</td><td> </td><td class="right">   documents (including fancy diffs) can be found at</td><td class="lineno" valign="top"></td></tr>
109      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td> </td><td class="right">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td class="lineno" valign="top"></td></tr>
110      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
111      <tr><td><a name="diff0005" /></td></tr>
112      <tr><td class="lineno" valign="top"></td><td class="lblock">   The changes in this draft are summarized in Appendix C.<span class="delete">8</span>.</td><td> </td><td class="rblock">   The changes in this draft are summarized in Appendix C.<span class="insert">9</span>.</td><td class="lineno" valign="top"></td></tr>
113      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
114      <tr><td class="lineno" valign="top"></td><td class="left">Table of Contents</td><td> </td><td class="right">Table of Contents</td><td class="lineno" valign="top"></td></tr>
115      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="left">   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
117      <tr><td class="lineno" valign="top"></td><td class="left">     1.1.  Requirements . . . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">     1.1.  Requirements . . . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
118      <tr><td class="lineno" valign="top"></td><td class="left">     1.2.  Syntax Notation  . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">     1.2.  Syntax Notation  . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
119      <tr><td class="lineno" valign="top"></td><td class="left">       1.2.1.  Core Rules . . . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">       1.2.1.  Core Rules . . . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
120      <tr><td class="lineno" valign="top"></td><td class="left">       1.2.2.  ABNF Rules defined in other Parts of the</td><td> </td><td class="right">       1.2.2.  ABNF Rules defined in other Parts of the</td><td class="lineno" valign="top"></td></tr>
121      <tr><td class="lineno" valign="top"></td><td class="left">               Specification  . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">               Specification  . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
122      <tr><td class="lineno" valign="top"></td><td class="left">   2.  Entity Tags  . . . . . . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">   2.  Entity Tags  . . . . . . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
123      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
124      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 3, line 27</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 3, line 27</em></th><td></td></tr>
125      <tr><td class="lineno" valign="top"></td><td class="left">   4.  Weak and Strong Validators . . . . . . . . . . . . . . . . . .  7</td><td> </td><td class="right">   4.  Weak and Strong Validators . . . . . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
126      <tr><td class="lineno" valign="top"></td><td class="left">   5.  Rules for When to Use Entity Tags and Last-Modified Dates  . .  9</td><td> </td><td class="right">   5.  Rules for When to Use Entity Tags and Last-Modified Dates  . .  9</td><td class="lineno" valign="top"></td></tr>
127      <tr><td class="lineno" valign="top"></td><td class="left">   6.  Header Field Definitions . . . . . . . . . . . . . . . . . . . 11</td><td> </td><td class="right">   6.  Header Field Definitions . . . . . . . . . . . . . . . . . . . 11</td><td class="lineno" valign="top"></td></tr>
128      <tr><td class="lineno" valign="top"></td><td class="left">     6.1.  ETag . . . . . . . . . . . . . . . . . . . . . . . . . . . 11</td><td> </td><td class="right">     6.1.  ETag . . . . . . . . . . . . . . . . . . . . . . . . . . . 11</td><td class="lineno" valign="top"></td></tr>
129      <tr><td class="lineno" valign="top"></td><td class="left">     6.2.  If-Match . . . . . . . . . . . . . . . . . . . . . . . . . 12</td><td> </td><td class="right">     6.2.  If-Match . . . . . . . . . . . . . . . . . . . . . . . . . 12</td><td class="lineno" valign="top"></td></tr>
130      <tr><td class="lineno" valign="top"></td><td class="left">     6.3.  If-Modified-Since  . . . . . . . . . . . . . . . . . . . . 13</td><td> </td><td class="right">     6.3.  If-Modified-Since  . . . . . . . . . . . . . . . . . . . . 13</td><td class="lineno" valign="top"></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="left">     6.4.  If-None-Match  . . . . . . . . . . . . . . . . . . . . . . 15</td><td> </td><td class="right">     6.4.  If-None-Match  . . . . . . . . . . . . . . . . . . . . . . 15</td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="left">     6.5.  If-Unmodified-Since  . . . . . . . . . . . . . . . . . . . 16</td><td> </td><td class="right">     6.5.  If-Unmodified-Since  . . . . . . . . . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
133      <tr><td class="lineno" valign="top"></td><td class="left">     6.6.  Last-Modified  . . . . . . . . . . . . . . . . . . . . . . 17</td><td> </td><td class="right">     6.6.  Last-Modified  . . . . . . . . . . . . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
134      <tr><td class="lineno" valign="top"></td><td class="left">   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 17</td><td> </td><td class="right">   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
135      <tr><td><a name="diff0006" /></td></tr>
136      <tr><td class="lineno" valign="top"></td><td class="lblock">     7.1.  Message Header Registration  . . . . . . . . . . . . . . . <span class="delete">17</span></td><td> </td><td class="rblock">     7.1.  <span class="insert">Status Code Registration . . . . . . . . . . . . . . . . . 17</span></td><td class="lineno" valign="top"></td></tr>
137      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     7.2.</span>  Message Header Registration  . . . . . . . . . . . . . . . <span class="insert">18</span></td><td class="lineno" valign="top"></td></tr>
138      <tr><td class="lineno" valign="top"></td><td class="left">   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
139      <tr><td class="lineno" valign="top"></td><td class="left">   9.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">   9.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="left">   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="left">     10.1. Normative References . . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">     10.1. Normative References . . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
142      <tr><td class="lineno" valign="top"></td><td class="left">     10.2. Informative References . . . . . . . . . . . . . . . . . . 19</td><td> </td><td class="right">     10.2. Informative References . . . . . . . . . . . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix A.  Compatibility with Previous Versions  . . . . . . . . 19</td><td> </td><td class="right">   Appendix A.  Compatibility with Previous Versions  . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="left">     A.1.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . . 19</td><td> </td><td class="right">     A.1.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
145      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix B.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 20</td><td> </td><td class="right">   Appendix B.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 20</td><td class="lineno" valign="top"></td></tr>
146      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix C.  Change Log (to be removed by RFC Editor before</td><td> </td><td class="right">   Appendix C.  Change Log (to be removed by RFC Editor before</td><td class="lineno" valign="top"></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="left">                publication)  . . . . . . . . . . . . . . . . . . . . 20</td><td> </td><td class="right">                publication)  . . . . . . . . . . . . . . . . . . . . 20</td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno" valign="top"></td><td class="left">     C.1.  Since RFC2616  . . . . . . . . . . . . . . . . . . . . . . 20</td><td> </td><td class="right">     C.1.  Since RFC2616  . . . . . . . . . . . . . . . . . . . . . . 20</td><td class="lineno" valign="top"></td></tr>
149      <tr><td class="lineno" valign="top"></td><td class="left">     C.2.  Since draft-ietf-httpbis-p4-conditional-00 . . . . . . . . 21</td><td> </td><td class="right">     C.2.  Since draft-ietf-httpbis-p4-conditional-00 . . . . . . . . 21</td><td class="lineno" valign="top"></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="left">     C.3.  Since draft-ietf-httpbis-p4-conditional-01 . . . . . . . . 21</td><td> </td><td class="right">     C.3.  Since draft-ietf-httpbis-p4-conditional-01 . . . . . . . . 21</td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="left">     C.4.  Since draft-ietf-httpbis-p4-conditional-02 . . . . . . . . 21</td><td> </td><td class="right">     C.4.  Since draft-ietf-httpbis-p4-conditional-02 . . . . . . . . 21</td><td class="lineno" valign="top"></td></tr>
152      <tr><td class="lineno" valign="top"></td><td class="left">     C.5.  Since draft-ietf-httpbis-p4-conditional-03 . . . . . . . . 21</td><td> </td><td class="right">     C.5.  Since draft-ietf-httpbis-p4-conditional-03 . . . . . . . . 21</td><td class="lineno" valign="top"></td></tr>
153      <tr><td class="lineno" valign="top"></td><td class="left">     C.6.  Since draft-ietf-httpbis-p4-conditional-04 . . . . . . . . 22</td><td> </td><td class="right">     C.6.  Since draft-ietf-httpbis-p4-conditional-04 . . . . . . . . 22</td><td class="lineno" valign="top"></td></tr>
154      <tr><td class="lineno" valign="top"></td><td class="left">     C.7.  Since draft-ietf-httpbis-p4-conditional-05 . . . . . . . . 22</td><td> </td><td class="right">     C.7.  Since draft-ietf-httpbis-p4-conditional-05 . . . . . . . . 22</td><td class="lineno" valign="top"></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="left">     C.8.  Since draft-ietf-httpbis-p4-conditional-06 . . . . . . . . 22</td><td> </td><td class="right">     C.8.  Since draft-ietf-httpbis-p4-conditional-06 . . . . . . . . 22</td><td class="lineno" valign="top"></td></tr>
156      <tr><td><a name="diff0007" /></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     C.9.  Since draft-ietf-httpbis-p4-conditional-07 . . . . . . . . 22</span></td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="left">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22</td><td> </td><td class="right">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22</td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="left">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 23</td><td> </td><td class="right">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 23</td><td class="lineno" valign="top"></td></tr>
160      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="left">1.  Introduction</td><td> </td><td class="right">1.  Introduction</td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="left">   This document defines HTTP/1.1 response metadata for indicating</td><td> </td><td class="right">   This document defines HTTP/1.1 response metadata for indicating</td><td class="lineno" valign="top"></td></tr>
164      <tr><td class="lineno" valign="top"></td><td class="left">   potential changes to payload content, including modification time</td><td> </td><td class="right">   potential changes to payload content, including modification time</td><td class="lineno" valign="top"></td></tr>
165      <tr><td class="lineno" valign="top"></td><td class="left">   stamps and opaque entity-tags, and the HTTP conditional request</td><td> </td><td class="right">   stamps and opaque entity-tags, and the HTTP conditional request</td><td class="lineno" valign="top"></td></tr>
166      <tr><td class="lineno" valign="top"></td><td class="left">   mechanisms that allow preconditions to be placed on a request method.</td><td> </td><td class="right">   mechanisms that allow preconditions to be placed on a request method.</td><td class="lineno" valign="top"></td></tr>
167      <tr><td class="lineno" valign="top"></td><td class="left">   Conditional GET requests allow for efficient cache updates.  Other</td><td> </td><td class="right">   Conditional GET requests allow for efficient cache updates.  Other</td><td class="lineno" valign="top"></td></tr>
168      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
169      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 5, line 19</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 5, line 19</em></th><td></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="left">   The core rules below are defined in Section 1.2.2 of [Part1]:</td><td> </td><td class="right">   The core rules below are defined in Section 1.2.2 of [Part1]:</td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="left">     quoted-string = &lt;quoted-string, defined in [Part1], Section 1.2.2&gt;</td><td> </td><td class="right">     quoted-string = &lt;quoted-string, defined in [Part1], Section 1.2.2&gt;</td><td class="lineno" valign="top"></td></tr>
174      <tr><td class="lineno" valign="top"></td><td class="left">     OWS           = &lt;OWS, defined in [Part1], Section 1.2.2&gt;</td><td> </td><td class="right">     OWS           = &lt;OWS, defined in [Part1], Section 1.2.2&gt;</td><td class="lineno" valign="top"></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
176      <tr><td class="lineno" valign="top"></td><td class="left">1.2.2.  ABNF Rules defined in other Parts of the Specification</td><td> </td><td class="right">1.2.2.  ABNF Rules defined in other Parts of the Specification</td><td class="lineno" valign="top"></td></tr>
177      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="left">   The ABNF rules below are defined in other parts:</td><td> </td><td class="right">   The ABNF rules below are defined in other parts:</td><td class="lineno" valign="top"></td></tr>
179      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
180      <tr><td><a name="diff0008" /></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="lblock">     HTTP-date     = &lt;HTTP-date, defined in [Part1], Section <span class="delete">3.2</span>&gt;</td><td> </td><td class="rblock">     HTTP-date     = &lt;HTTP-date, defined in [Part1], Section <span class="insert">6.1</span>&gt;</td><td class="lineno" valign="top"></td></tr>
182      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
183      <tr><td class="lineno" valign="top"></td><td class="left">2.  Entity Tags</td><td> </td><td class="right">2.  Entity Tags</td><td class="lineno" valign="top"></td></tr>
184      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="left">   Entity tags are used for comparing two or more entities from the same</td><td> </td><td class="right">   Entity tags are used for comparing two or more entities from the same</td><td class="lineno" valign="top"></td></tr>
186      <tr><td class="lineno" valign="top"></td><td class="left">   requested resource.  HTTP/1.1 uses entity tags in the ETag</td><td> </td><td class="right">   requested resource.  HTTP/1.1 uses entity tags in the ETag</td><td class="lineno" valign="top"></td></tr>
187      <tr><td class="lineno" valign="top"></td><td class="left">   (Section 6.1), If-Match (Section 6.2), If-None-Match (Section 6.4),</td><td> </td><td class="right">   (Section 6.1), If-Match (Section 6.2), If-None-Match (Section 6.4),</td><td class="lineno" valign="top"></td></tr>
188      <tr><td class="lineno" valign="top"></td><td class="left">   and If-Range (Section 5.3 of [Part5]) header fields.  The definition</td><td> </td><td class="right">   and If-Range (Section 5.3 of [Part5]) header fields.  The definition</td><td class="lineno" valign="top"></td></tr>
189      <tr><td class="lineno" valign="top"></td><td class="left">   of how they are used and compared as cache validators is in</td><td> </td><td class="right">   of how they are used and compared as cache validators is in</td><td class="lineno" valign="top"></td></tr>
190      <tr><td class="lineno" valign="top"></td><td class="left">   Section 4.  An entity tag consists of an opaque quoted string,</td><td> </td><td class="right">   Section 4.  An entity tag consists of an opaque quoted string,</td><td class="lineno" valign="top"></td></tr>
191      <tr><td class="lineno" valign="top"></td><td class="left">   possibly prefixed by a weakness indicator.</td><td> </td><td class="right">   possibly prefixed by a weakness indicator.</td><td class="lineno" valign="top"></td></tr>
192      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
193      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 6, line 17</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 6, line 17</em></th><td></td></tr>
194      <tr><td class="lineno" valign="top"></td><td class="left">3.1.  304 Not Modified</td><td> </td><td class="right">3.1.  304 Not Modified</td><td class="lineno" valign="top"></td></tr>
195      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
196      <tr><td class="lineno" valign="top"></td><td class="left">   If the client has performed a conditional GET request and access is</td><td> </td><td class="right">   If the client has performed a conditional GET request and access is</td><td class="lineno" valign="top"></td></tr>
197      <tr><td class="lineno" valign="top"></td><td class="left">   allowed, but the document has not been modified, the server SHOULD</td><td> </td><td class="right">   allowed, but the document has not been modified, the server SHOULD</td><td class="lineno" valign="top"></td></tr>
198      <tr><td class="lineno" valign="top"></td><td class="left">   respond with this status code.  The 304 response MUST NOT contain a</td><td> </td><td class="right">   respond with this status code.  The 304 response MUST NOT contain a</td><td class="lineno" valign="top"></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="left">   message-body, and thus is always terminated by the first empty line</td><td> </td><td class="right">   message-body, and thus is always terminated by the first empty line</td><td class="lineno" valign="top"></td></tr>
200      <tr><td class="lineno" valign="top"></td><td class="left">   after the header fields.</td><td> </td><td class="right">   after the header fields.</td><td class="lineno" valign="top"></td></tr>
201      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
202      <tr><td class="lineno" valign="top"></td><td class="left">   The response MUST include the following header fields:</td><td> </td><td class="right">   The response MUST include the following header fields:</td><td class="lineno" valign="top"></td></tr>
203      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
204      <tr><td><a name="diff0009" /></td></tr>
205      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  Date, unless its omission is required by Section <span class="delete">8</span>.3.1 of [Part1].</td><td> </td><td class="rblock">   o  Date, unless its omission is required by Section <span class="insert">9</span>.3.1 of [Part1].</td><td class="lineno" valign="top"></td></tr>
206      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
207      <tr><td class="lineno" valign="top"></td><td class="left">      If a clockless origin server obeys these rules, and proxies and</td><td> </td><td class="right">      If a clockless origin server obeys these rules, and proxies and</td><td class="lineno" valign="top"></td></tr>
208      <tr><td class="lineno" valign="top"></td><td class="left">      clients add their own Date to any response received without one</td><td> </td><td class="right">      clients add their own Date to any response received without one</td><td class="lineno" valign="top"></td></tr>
209      <tr><td><a name="diff0010" /></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="lblock">      (as already specified by Section <span class="delete">8</span>.3 of [Part1], caches will</td><td> </td><td class="rblock">      (as already specified by Section <span class="insert">9</span>.3 of [Part1], caches will</td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="left">      operate correctly.</td><td> </td><td class="right">      operate correctly.</td><td class="lineno" valign="top"></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="left">   o  ETag and/or Content-Location, if the header would have been sent</td><td> </td><td class="right">   o  ETag and/or Content-Location, if the header would have been sent</td><td class="lineno" valign="top"></td></tr>
214      <tr><td class="lineno" valign="top"></td><td class="left">      in a 200 response to the same request.</td><td> </td><td class="right">      in a 200 response to the same request.</td><td class="lineno" valign="top"></td></tr>
215      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
216      <tr><td class="lineno" valign="top"></td><td class="left">   o  Expires, Cache-Control, and/or Vary, if the field-value might</td><td> </td><td class="right">   o  Expires, Cache-Control, and/or Vary, if the field-value might</td><td class="lineno" valign="top"></td></tr>
217      <tr><td class="lineno" valign="top"></td><td class="left">      differ from that sent in any previous response for the same</td><td> </td><td class="right">      differ from that sent in any previous response for the same</td><td class="lineno" valign="top"></td></tr>
218      <tr><td class="lineno" valign="top"></td><td class="left">      variant.</td><td> </td><td class="right">      variant.</td><td class="lineno" valign="top"></td></tr>
219      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
220      <tr><td class="lineno" valign="top"></td><td class="left">   If the conditional GET used a strong cache validator (see Section 4),</td><td> </td><td class="right">   If the conditional GET used a strong cache validator (see Section 4),</td><td class="lineno" valign="top"></td></tr>
221      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
222      <tr bgcolor="gray" ><td></td><th><a name="part-l7" /><small>skipping to change at</small><em> page 8, line 14</em></th><th> </th><th><a name="part-r7" /><small>skipping to change at</small><em> page 8, line 14</em></th><td></td></tr>
223      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno" valign="top"></td><td class="left">   The only function that HTTP/1.1 defines on validators is comparison.</td><td> </td><td class="right">   The only function that HTTP/1.1 defines on validators is comparison.</td><td class="lineno" valign="top"></td></tr>
225      <tr><td class="lineno" valign="top"></td><td class="left">   There are two validator comparison functions, depending on whether</td><td> </td><td class="right">   There are two validator comparison functions, depending on whether</td><td class="lineno" valign="top"></td></tr>
226      <tr><td class="lineno" valign="top"></td><td class="left">   the comparison context allows the use of weak validators or not:</td><td> </td><td class="right">   the comparison context allows the use of weak validators or not:</td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
228      <tr><td class="lineno" valign="top"></td><td class="left">   o  The strong comparison function: in order to be considered equal,</td><td> </td><td class="right">   o  The strong comparison function: in order to be considered equal,</td><td class="lineno" valign="top"></td></tr>
229      <tr><td class="lineno" valign="top"></td><td class="left">      both opaque-tags MUST be identical character-by-character, and</td><td> </td><td class="right">      both opaque-tags MUST be identical character-by-character, and</td><td class="lineno" valign="top"></td></tr>
230      <tr><td class="lineno" valign="top"></td><td class="left">      both MUST NOT be weak.</td><td> </td><td class="right">      both MUST NOT be weak.</td><td class="lineno" valign="top"></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno" valign="top"></td><td class="left">   o  The weak comparison function: in order to be considered equal,</td><td> </td><td class="right">   o  The weak comparison function: in order to be considered equal,</td><td class="lineno" valign="top"></td></tr>
233      <tr><td><a name="diff0011" /></td></tr>
234      <tr><td class="lineno" valign="top"></td><td class="lblock">      both opaque-tags MUST be identical <span class="delete">character-by-character.</span></td><td> </td><td class="rblock">      both opaque-tags MUST be identical <span class="insert">character-by-character, but</span></td><td class="lineno" valign="top"></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      either or both of them MAY be tagged as "weak" without affecting</span></td><td class="lineno" valign="top"></td></tr>
236      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      the result.</span></td><td class="lineno" valign="top"></td></tr>
237      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
238      <tr><td class="lineno" valign="top"></td><td class="left">   The example below shows the results for a set of entity tag pairs,</td><td> </td><td class="right">   The example below shows the results for a set of entity tag pairs,</td><td class="lineno" valign="top"></td></tr>
239      <tr><td class="lineno" valign="top"></td><td class="left">   and both the weak and strong comparison function results:</td><td> </td><td class="right">   and both the weak and strong comparison function results:</td><td class="lineno" valign="top"></td></tr>
240      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
241      <tr><td class="lineno" valign="top"></td><td class="left">   +--------+--------+-------------------+-----------------+</td><td> </td><td class="right">   +--------+--------+-------------------+-----------------+</td><td class="lineno" valign="top"></td></tr>
242      <tr><td class="lineno" valign="top"></td><td class="left">   | ETag 1 | ETag 2 | Strong Comparison | Weak Comparison |</td><td> </td><td class="right">   | ETag 1 | ETag 2 | Strong Comparison | Weak Comparison |</td><td class="lineno" valign="top"></td></tr>
243      <tr><td class="lineno" valign="top"></td><td class="left">   +--------+--------+-------------------+-----------------+</td><td> </td><td class="right">   +--------+--------+-------------------+-----------------+</td><td class="lineno" valign="top"></td></tr>
244      <tr><td class="lineno" valign="top"></td><td class="left">   | W/"1"  | W/"1"  | no match          | match           |</td><td> </td><td class="right">   | W/"1"  | W/"1"  | no match          | match           |</td><td class="lineno" valign="top"></td></tr>
245      <tr><td class="lineno" valign="top"></td><td class="left">   | W/"1"  | W/"2"  | no match          | no match        |</td><td> </td><td class="right">   | W/"1"  | W/"2"  | no match          | no match        |</td><td class="lineno" valign="top"></td></tr>
246      <tr><td class="lineno" valign="top"></td><td class="left">   | W/"1"  | "1"    | no match          | match           |</td><td> </td><td class="right">   | W/"1"  | "1"    | no match          | match           |</td><td class="lineno" valign="top"></td></tr>
247      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
248      <tr bgcolor="gray" ><td></td><th><a name="part-l8" /><small>skipping to change at</small><em> page 11, line 39</em></th><th> </th><th><a name="part-r8" /><small>skipping to change at</small><em> page 11, line 41</em></th><td></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="left">   This section defines the syntax and semantics of HTTP/1.1 header</td><td> </td><td class="right">   This section defines the syntax and semantics of HTTP/1.1 header</td><td class="lineno" valign="top"></td></tr>
251      <tr><td class="lineno" valign="top"></td><td class="left">   fields related to conditional requests.</td><td> </td><td class="right">   fields related to conditional requests.</td><td class="lineno" valign="top"></td></tr>
252      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
253      <tr><td class="lineno" valign="top"></td><td class="left">   For entity-header fields, both sender and recipient refer to either</td><td> </td><td class="right">   For entity-header fields, both sender and recipient refer to either</td><td class="lineno" valign="top"></td></tr>
254      <tr><td class="lineno" valign="top"></td><td class="left">   the client or the server, depending on who sends and who receives the</td><td> </td><td class="right">   the client or the server, depending on who sends and who receives the</td><td class="lineno" valign="top"></td></tr>
255      <tr><td class="lineno" valign="top"></td><td class="left">   entity.</td><td> </td><td class="right">   entity.</td><td class="lineno" valign="top"></td></tr>
256      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="left">6.1.  ETag</td><td> </td><td class="right">6.1.  ETag</td><td class="lineno" valign="top"></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
259      <tr><td><a name="diff0012" /></td></tr>
260      <tr><td class="lineno" valign="top"></td><td class="lblock">   The response-header field <span class="delete">"ETag"</span> provides the current value of the</td><td> </td><td class="rblock">   The <span class="insert">"ETag"</span> response-header field provides the current value of the</td><td class="lineno" valign="top"></td></tr>
261      <tr><td class="lineno" valign="top"></td><td class="lblock">   entity tag (see Section 2) for the requested <span class="delete">variant.  The headers</span></td><td> </td><td class="rblock">   entity tag (see Section 2) for the requested <span class="insert">variant, which may</span> be</td><td class="lineno" valign="top"></td></tr>
262      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   used with entity tags are described in Sections 6.2 and 6.4 of this</span></td><td> </td><td class="rblock">   used for comparison with other entities from the same resource (see</td><td class="lineno" valign="top"></td></tr>
263      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   document, and in Section 5.3 of [Part5].  The entity tag MAY</span> be used</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
264      <tr><td class="lineno" valign="top"></td><td class="lblock">   for comparison with other entities from the same resource (see</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
265      <tr><td class="lineno" valign="top"></td><td class="left">   Section 4).</td><td> </td><td class="right">   Section 4).</td><td class="lineno" valign="top"></td></tr>
266      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
267      <tr><td class="lineno" valign="top"></td><td class="left">     ETag   = "ETag" ":" OWS ETag-v</td><td> </td><td class="right">     ETag   = "ETag" ":" OWS ETag-v</td><td class="lineno" valign="top"></td></tr>
268      <tr><td class="lineno" valign="top"></td><td class="left">     ETag-v = entity-tag</td><td> </td><td class="right">     ETag-v = entity-tag</td><td class="lineno" valign="top"></td></tr>
269      <tr><td class="lineno" valign="top"></td><td class="left">   Examples:</td><td> </td><td class="right">   Examples:</td><td class="lineno" valign="top"></td></tr>
270      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
271      <tr><td class="lineno" valign="top"></td><td class="left">     ETag: "xyzzy"</td><td> </td><td class="right">     ETag: "xyzzy"</td><td class="lineno" valign="top"></td></tr>
272      <tr><td class="lineno" valign="top"></td><td class="left">     ETag: W/"xyzzy"</td><td> </td><td class="right">     ETag: W/"xyzzy"</td><td class="lineno" valign="top"></td></tr>
273      <tr><td class="lineno" valign="top"></td><td class="left">     ETag: ""</td><td> </td><td class="right">     ETag: ""</td><td class="lineno" valign="top"></td></tr>
274      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
275      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
276      <tr bgcolor="gray" ><td></td><th><a name="part-l9" /><small>skipping to change at</small><em> page 12, line 27</em></th><th> </th><th><a name="part-r9" /><small>skipping to change at</small><em> page 12, line 27</em></th><td></td></tr>
277      <tr><td class="lineno" valign="top"></td><td class="left">   The principle behind entity tags is that only the service author</td><td> </td><td class="right">   The principle behind entity tags is that only the service author</td><td class="lineno" valign="top"></td></tr>
278      <tr><td class="lineno" valign="top"></td><td class="left">   knows the semantics of a resource well enough to select an</td><td> </td><td class="right">   knows the semantics of a resource well enough to select an</td><td class="lineno" valign="top"></td></tr>
279      <tr><td class="lineno" valign="top"></td><td class="left">   appropriate cache validation mechanism, and the specification of any</td><td> </td><td class="right">   appropriate cache validation mechanism, and the specification of any</td><td class="lineno" valign="top"></td></tr>
280      <tr><td class="lineno" valign="top"></td><td class="left">   validator comparison function more complex than byte-equality would</td><td> </td><td class="right">   validator comparison function more complex than byte-equality would</td><td class="lineno" valign="top"></td></tr>
281      <tr><td class="lineno" valign="top"></td><td class="left">   open up a can of worms.  Thus, comparisons of any other headers</td><td> </td><td class="right">   open up a can of worms.  Thus, comparisons of any other headers</td><td class="lineno" valign="top"></td></tr>
282      <tr><td class="lineno" valign="top"></td><td class="left">   (except Last-Modified, for compatibility with HTTP/1.0) are never</td><td> </td><td class="right">   (except Last-Modified, for compatibility with HTTP/1.0) are never</td><td class="lineno" valign="top"></td></tr>
283      <tr><td class="lineno" valign="top"></td><td class="left">   used for purposes of validating a cache entry.</td><td> </td><td class="right">   used for purposes of validating a cache entry.</td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
285      <tr><td class="lineno" valign="top"></td><td class="left">6.2.  If-Match</td><td> </td><td class="right">6.2.  If-Match</td><td class="lineno" valign="top"></td></tr>
286      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
287      <tr><td><a name="diff0013" /></td></tr>
288      <tr><td class="lineno" valign="top"></td><td class="lblock">   The <span class="delete">request-header field "If-Match" is used with a method to make it</span></td><td> </td><td class="rblock">   The <span class="insert">"If-Match" request-header field is used to make a request method</span></td><td class="lineno" valign="top"></td></tr>
289      <tr><td class="lineno" valign="top"></td><td class="left">   conditional.  A client that has one or more entities previously</td><td> </td><td class="right">   conditional.  A client that has one or more entities previously</td><td class="lineno" valign="top"></td></tr>
290      <tr><td class="lineno" valign="top"></td><td class="left">   obtained from the resource can verify that one of those entities is</td><td> </td><td class="right">   obtained from the resource can verify that one of those entities is</td><td class="lineno" valign="top"></td></tr>
291      <tr><td class="lineno" valign="top"></td><td class="left">   current by including a list of their associated entity tags in the</td><td> </td><td class="right">   current by including a list of their associated entity tags in the</td><td class="lineno" valign="top"></td></tr>
292      <tr><td><a name="diff0014" /></td></tr>
293      <tr><td class="lineno" valign="top"></td><td class="lblock">   If-Match header field.  <span class="delete">Entity tags are defined in Section 2.  The</span></td><td> </td><td class="rblock">   If-Match header field.</td><td class="lineno" valign="top"></td></tr>
294      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   purpose of this feature is to allow</span> efficient updates of cached</td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
295      <tr><td class="lineno" valign="top"></td><td class="lblock">   information with a minimum amount of transaction overhead.  It is</td><td> </td><td class="rblock">   <span class="insert">This allows</span> efficient updates of cached information with a minimum</td><td class="lineno" valign="top"></td></tr>
296      <tr><td class="lineno" valign="top"></td><td class="lblock">   also <span class="delete">used, on</span> updating <span class="delete">requests,</span> to prevent inadvertent modification</td><td> </td><td class="rblock">   amount of transaction overhead.  It is also <span class="insert">used when</span> updating</td><td class="lineno" valign="top"></td></tr>
297      <tr><td class="lineno" valign="top"></td><td class="lblock">   of the wrong version of a resource.  As a special case, the value "*"</td><td> </td><td class="rblock">   <span class="insert">resources,</span> to prevent inadvertent modification of the wrong version</td><td class="lineno" valign="top"></td></tr>
298      <tr><td class="lineno" valign="top"></td><td class="lblock">   matches any current entity of the resource.</td><td> </td><td class="rblock">   of a resource.  As a special case, the value "*" matches any current</td><td class="lineno" valign="top"></td></tr>
299      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   entity of the resource.</td><td class="lineno" valign="top"></td></tr>
300      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
301      <tr><td class="lineno" valign="top"></td><td class="left">     If-Match   = "If-Match" ":" OWS If-Match-v</td><td> </td><td class="right">     If-Match   = "If-Match" ":" OWS If-Match-v</td><td class="lineno" valign="top"></td></tr>
302      <tr><td class="lineno" valign="top"></td><td class="left">     If-Match-v = "*" / 1#entity-tag</td><td> </td><td class="right">     If-Match-v = "*" / 1#entity-tag</td><td class="lineno" valign="top"></td></tr>
303      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
304      <tr><td class="lineno" valign="top"></td><td class="left">   If any of the entity tags match the entity tag of the entity that</td><td> </td><td class="right">   If any of the entity tags match the entity tag of the entity that</td><td class="lineno" valign="top"></td></tr>
305      <tr><td class="lineno" valign="top"></td><td class="left">   would have been returned in the response to a similar GET request</td><td> </td><td class="right">   would have been returned in the response to a similar GET request</td><td class="lineno" valign="top"></td></tr>
306      <tr><td class="lineno" valign="top"></td><td class="left">   (without the If-Match header) on that resource, or if "*" is given</td><td> </td><td class="right">   (without the If-Match header) on that resource, or if "*" is given</td><td class="lineno" valign="top"></td></tr>
307      <tr><td class="lineno" valign="top"></td><td class="left">   and any current entity exists for that resource, then the server MAY</td><td> </td><td class="right">   and any current entity exists for that resource, then the server MAY</td><td class="lineno" valign="top"></td></tr>
308      <tr><td class="lineno" valign="top"></td><td class="left">   perform the requested method as if the If-Match header field did not</td><td> </td><td class="right">   perform the requested method as if the If-Match header field did not</td><td class="lineno" valign="top"></td></tr>
309      <tr><td class="lineno" valign="top"></td><td class="left">   exist.</td><td> </td><td class="right">   exist.</td><td class="lineno" valign="top"></td></tr>
310      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
311      <tr><td><a name="diff0015" /></td></tr>
312      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">A server MUST use the strong comparison function (see Section 4) to</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
313      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   compare the entity tags in If-Match.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                                         </td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
315      <tr><td class="lineno" valign="top"></td><td class="left">   If none of the entity tags match, or if "*" is given and no current</td><td> </td><td class="right">   If none of the entity tags match, or if "*" is given and no current</td><td class="lineno" valign="top"></td></tr>
316      <tr><td class="lineno" valign="top"></td><td class="left">   entity exists, the server MUST NOT perform the requested method, and</td><td> </td><td class="right">   entity exists, the server MUST NOT perform the requested method, and</td><td class="lineno" valign="top"></td></tr>
317      <tr><td class="lineno" valign="top"></td><td class="left">   MUST return a 412 (Precondition Failed) response.  This behavior is</td><td> </td><td class="right">   MUST return a 412 (Precondition Failed) response.  This behavior is</td><td class="lineno" valign="top"></td></tr>
318      <tr><td class="lineno" valign="top"></td><td class="left">   most useful when the client wants to prevent an updating method, such</td><td> </td><td class="right">   most useful when the client wants to prevent an updating method, such</td><td class="lineno" valign="top"></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="left">   as PUT, from modifying a resource that has changed since the client</td><td> </td><td class="right">   as PUT, from modifying a resource that has changed since the client</td><td class="lineno" valign="top"></td></tr>
320      <tr><td class="lineno" valign="top"></td><td class="left">   last retrieved it.</td><td> </td><td class="right">   last retrieved it.</td><td class="lineno" valign="top"></td></tr>
321      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
322      <tr><td class="lineno" valign="top"></td><td class="left">   If the request would, without the If-Match header field, result in</td><td> </td><td class="right">   If the request would, without the If-Match header field, result in</td><td class="lineno" valign="top"></td></tr>
323      <tr><td class="lineno" valign="top"></td><td class="left">   anything other than a 2xx or 412 status, then the If-Match header</td><td> </td><td class="right">   anything other than a 2xx or 412 status, then the If-Match header</td><td class="lineno" valign="top"></td></tr>
324      <tr><td class="lineno" valign="top"></td><td class="left">   MUST be ignored.</td><td> </td><td class="right">   MUST be ignored.</td><td class="lineno" valign="top"></td></tr>
325      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
326      <tr bgcolor="gray" ><td></td><th><a name="part-l10" /><small>skipping to change at</small><em> page 13, line 38</em></th><th> </th><th><a name="part-r10" /><small>skipping to change at</small><em> page 13, line 36</em></th><td></td></tr>
327      <tr><td class="lineno" valign="top"></td><td class="left">     If-Match: "xyzzy"</td><td> </td><td class="right">     If-Match: "xyzzy"</td><td class="lineno" valign="top"></td></tr>
328      <tr><td class="lineno" valign="top"></td><td class="left">     If-Match: "xyzzy", "r2d2xxxx", "c3piozzzz"</td><td> </td><td class="right">     If-Match: "xyzzy", "r2d2xxxx", "c3piozzzz"</td><td class="lineno" valign="top"></td></tr>
329      <tr><td class="lineno" valign="top"></td><td class="left">     If-Match: *</td><td> </td><td class="right">     If-Match: *</td><td class="lineno" valign="top"></td></tr>
330      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
331      <tr><td class="lineno" valign="top"></td><td class="left">   The result of a request having both an If-Match header field and</td><td> </td><td class="right">   The result of a request having both an If-Match header field and</td><td class="lineno" valign="top"></td></tr>
332      <tr><td class="lineno" valign="top"></td><td class="left">   either an If-None-Match or an If-Modified-Since header fields is</td><td> </td><td class="right">   either an If-None-Match or an If-Modified-Since header fields is</td><td class="lineno" valign="top"></td></tr>
333      <tr><td class="lineno" valign="top"></td><td class="left">   undefined by this specification.</td><td> </td><td class="right">   undefined by this specification.</td><td class="lineno" valign="top"></td></tr>
334      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
335      <tr><td class="lineno" valign="top"></td><td class="left">6.3.  If-Modified-Since</td><td> </td><td class="right">6.3.  If-Modified-Since</td><td class="lineno" valign="top"></td></tr>
336      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
337      <tr><td><a name="diff0016" /></td></tr>
338      <tr><td class="lineno" valign="top"></td><td class="lblock">   The request-header field <span class="delete">"If-Modified-Since"</span> is used <span class="delete">with a method</span> to</td><td> </td><td class="rblock">   The <span class="insert">"If-Modified-Since"</span> request-header field is used to make <span class="insert">a</span></td><td class="lineno" valign="top"></td></tr>
339      <tr><td class="lineno" valign="top"></td><td class="lblock">   make <span class="delete">it</span> conditional: if the requested variant has not been modified</td><td> </td><td class="rblock"><span class="insert">   request method</span> conditional: if the requested variant has not been</td><td class="lineno" valign="top"></td></tr>
340      <tr><td class="lineno" valign="top"></td><td class="lblock">   since the time specified in this field, <span class="delete">an entity</span> will not <span class="delete">be</span></td><td> </td><td class="rblock">   modified since the time specified in this field, <span class="insert">the server</span> will not</td><td class="lineno" valign="top"></td></tr>
341      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   returned from the server;</span> instead, a 304 (Not Modified) response will</td><td> </td><td class="rblock">   <span class="insert">return an entity;</span> instead, a 304 (Not Modified) response will be</td><td class="lineno" valign="top"></td></tr>
342      <tr><td class="lineno" valign="top"></td><td class="lblock">   be <span class="delete">returned without any message-body.</span></td><td> </td><td class="rblock">   <span class="insert">returned.</span></td><td class="lineno" valign="top"></td></tr>
343      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
344      <tr><td class="lineno" valign="top"></td><td class="left">     If-Modified-Since   = "If-Modified-Since" ":" OWS</td><td> </td><td class="right">     If-Modified-Since   = "If-Modified-Since" ":" OWS</td><td class="lineno" valign="top"></td></tr>
345      <tr><td class="lineno" valign="top"></td><td class="left">                           If-Modified-Since-v</td><td> </td><td class="right">                           If-Modified-Since-v</td><td class="lineno" valign="top"></td></tr>
346      <tr><td class="lineno" valign="top"></td><td class="left">     If-Modified-Since-v = HTTP-date</td><td> </td><td class="right">     If-Modified-Since-v = HTTP-date</td><td class="lineno" valign="top"></td></tr>
347      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
348      <tr><td class="lineno" valign="top"></td><td class="left">   An example of the field is:</td><td> </td><td class="right">   An example of the field is:</td><td class="lineno" valign="top"></td></tr>
349      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
350      <tr><td class="lineno" valign="top"></td><td class="left">     If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT</td><td> </td><td class="right">     If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT</td><td class="lineno" valign="top"></td></tr>
351      <tr><td><a name="diff0017" /></td></tr>
352      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">                                                                         </span></td><td class="lineno" valign="top"></td></tr>
353      <tr><td class="lineno" valign="top"></td><td class="left">   A GET method with an If-Modified-Since header and no Range header</td><td> </td><td class="right">   A GET method with an If-Modified-Since header and no Range header</td><td class="lineno" valign="top"></td></tr>
354      <tr><td class="lineno" valign="top"></td><td class="left">   requests that the identified entity be transferred only if it has</td><td> </td><td class="right">   requests that the identified entity be transferred only if it has</td><td class="lineno" valign="top"></td></tr>
355      <tr><td class="lineno" valign="top"></td><td class="left">   been modified since the date given by the If-Modified-Since header.</td><td> </td><td class="right">   been modified since the date given by the If-Modified-Since header.</td><td class="lineno" valign="top"></td></tr>
356      <tr><td class="lineno" valign="top"></td><td class="left">   The algorithm for determining this includes the following cases:</td><td> </td><td class="right">   The algorithm for determining this includes the following cases:</td><td class="lineno" valign="top"></td></tr>
357      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
358      <tr><td class="lineno" valign="top"></td><td class="left">   1.  If the request would normally result in anything other than a 200</td><td> </td><td class="right">   1.  If the request would normally result in anything other than a 200</td><td class="lineno" valign="top"></td></tr>
359      <tr><td class="lineno" valign="top"></td><td class="left">       (OK) status, or if the passed If-Modified-Since date is invalid,</td><td> </td><td class="right">       (OK) status, or if the passed If-Modified-Since date is invalid,</td><td class="lineno" valign="top"></td></tr>
360      <tr><td class="lineno" valign="top"></td><td class="left">       the response is exactly the same as for a normal GET.  A date</td><td> </td><td class="right">       the response is exactly the same as for a normal GET.  A date</td><td class="lineno" valign="top"></td></tr>
361      <tr><td class="lineno" valign="top"></td><td class="left">       which is later than the server's current time is invalid.</td><td> </td><td class="right">       which is later than the server's current time is invalid.</td><td class="lineno" valign="top"></td></tr>
362      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
363      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
364      <tr bgcolor="gray" ><td></td><th><a name="part-l11" /><small>skipping to change at</small><em> page 15, line 11</em></th><th> </th><th><a name="part-r11" /><small>skipping to change at</small><em> page 15, line 9</em></th><td></td></tr>
365      <tr><td class="lineno" valign="top"></td><td class="left">      to the server's clock.  Corrections for different time bases</td><td> </td><td class="right">      to the server's clock.  Corrections for different time bases</td><td class="lineno" valign="top"></td></tr>
366      <tr><td class="lineno" valign="top"></td><td class="left">      between client and server are at best approximate due to network</td><td> </td><td class="right">      between client and server are at best approximate due to network</td><td class="lineno" valign="top"></td></tr>
367      <tr><td class="lineno" valign="top"></td><td class="left">      latency.</td><td> </td><td class="right">      latency.</td><td class="lineno" valign="top"></td></tr>
368      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
369      <tr><td class="lineno" valign="top"></td><td class="left">   The result of a request having both an If-Modified-Since header field</td><td> </td><td class="right">   The result of a request having both an If-Modified-Since header field</td><td class="lineno" valign="top"></td></tr>
370      <tr><td class="lineno" valign="top"></td><td class="left">   and either an If-Match or an If-Unmodified-Since header fields is</td><td> </td><td class="right">   and either an If-Match or an If-Unmodified-Since header fields is</td><td class="lineno" valign="top"></td></tr>
371      <tr><td class="lineno" valign="top"></td><td class="left">   undefined by this specification.</td><td> </td><td class="right">   undefined by this specification.</td><td class="lineno" valign="top"></td></tr>
372      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
373      <tr><td class="lineno" valign="top"></td><td class="left">6.4.  If-None-Match</td><td> </td><td class="right">6.4.  If-None-Match</td><td class="lineno" valign="top"></td></tr>
374      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
375      <tr><td><a name="diff0018" /></td></tr>
376      <tr><td class="lineno" valign="top"></td><td class="lblock">   The request-header field <span class="delete">"If-None-Match"</span> is used <span class="delete">with a method</span> to</td><td> </td><td class="rblock">   The <span class="insert">"If-None-Match"</span> request-header field is used to make <span class="insert">a request</span></td><td class="lineno" valign="top"></td></tr>
377      <tr><td class="lineno" valign="top"></td><td class="lblock">   make <span class="delete">it</span> conditional.  A client that has one or more entities</td><td> </td><td class="rblock"><span class="insert">   method</span> conditional.  A client that has one or more entities</td><td class="lineno" valign="top"></td></tr>
378      <tr><td class="lineno" valign="top"></td><td class="left">   previously obtained from the resource can verify that none of those</td><td> </td><td class="right">   previously obtained from the resource can verify that none of those</td><td class="lineno" valign="top"></td></tr>
379      <tr><td class="lineno" valign="top"></td><td class="left">   entities is current by including a list of their associated entity</td><td> </td><td class="right">   entities is current by including a list of their associated entity</td><td class="lineno" valign="top"></td></tr>
380      <tr><td><a name="diff0019" /></td></tr>
381      <tr><td class="lineno" valign="top"></td><td class="lblock">   tags in the If-None-Match header field.  <span class="delete">The purpose of this feature</span></td><td> </td><td class="rblock">   tags in the If-None-Match header field.</td><td class="lineno" valign="top"></td></tr>
382      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   is to allow</span> efficient updates of cached information with a minimum</td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
383      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">This allows</span> efficient updates of cached information with a minimum</td><td class="lineno" valign="top"></td></tr>
384      <tr><td class="lineno" valign="top"></td><td class="left">   amount of transaction overhead.  It is also used to prevent a method</td><td> </td><td class="right">   amount of transaction overhead.  It is also used to prevent a method</td><td class="lineno" valign="top"></td></tr>
385      <tr><td class="lineno" valign="top"></td><td class="left">   (e.g.  PUT) from inadvertently modifying an existing resource when</td><td> </td><td class="right">   (e.g.  PUT) from inadvertently modifying an existing resource when</td><td class="lineno" valign="top"></td></tr>
386      <tr><td class="lineno" valign="top"></td><td class="left">   the client believes that the resource does not exist.</td><td> </td><td class="right">   the client believes that the resource does not exist.</td><td class="lineno" valign="top"></td></tr>
387      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
388      <tr><td class="lineno" valign="top"></td><td class="left">   As a special case, the value "*" matches any current entity of the</td><td> </td><td class="right">   As a special case, the value "*" matches any current entity of the</td><td class="lineno" valign="top"></td></tr>
389      <tr><td class="lineno" valign="top"></td><td class="left">   resource.</td><td> </td><td class="right">   resource.</td><td class="lineno" valign="top"></td></tr>
390      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
391      <tr><td class="lineno" valign="top"></td><td class="left">     If-None-Match   = "If-None-Match" ":" OWS If-None-Match-v</td><td> </td><td class="right">     If-None-Match   = "If-None-Match" ":" OWS If-None-Match-v</td><td class="lineno" valign="top"></td></tr>
392      <tr><td class="lineno" valign="top"></td><td class="left">     If-None-Match-v = "*" / 1#entity-tag</td><td> </td><td class="right">     If-None-Match-v = "*" / 1#entity-tag</td><td class="lineno" valign="top"></td></tr>
393      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
394      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
395      <tr bgcolor="gray" ><td></td><th><a name="part-l12" /><small>skipping to change at</small><em> page 15, line 40</em></th><th> </th><th><a name="part-r12" /><small>skipping to change at</small><em> page 15, line 39</em></th><td></td></tr>
396      <tr><td class="lineno" valign="top"></td><td class="left">   given and any current entity exists for that resource, then the</td><td> </td><td class="right">   given and any current entity exists for that resource, then the</td><td class="lineno" valign="top"></td></tr>
397      <tr><td class="lineno" valign="top"></td><td class="left">   server MUST NOT perform the requested method, unless required to do</td><td> </td><td class="right">   server MUST NOT perform the requested method, unless required to do</td><td class="lineno" valign="top"></td></tr>
398      <tr><td class="lineno" valign="top"></td><td class="left">   so because the resource's modification date fails to match that</td><td> </td><td class="right">   so because the resource's modification date fails to match that</td><td class="lineno" valign="top"></td></tr>
399      <tr><td class="lineno" valign="top"></td><td class="left">   supplied in an If-Modified-Since header field in the request.</td><td> </td><td class="right">   supplied in an If-Modified-Since header field in the request.</td><td class="lineno" valign="top"></td></tr>
400      <tr><td class="lineno" valign="top"></td><td class="left">   Instead, if the request method was GET or HEAD, the server SHOULD</td><td> </td><td class="right">   Instead, if the request method was GET or HEAD, the server SHOULD</td><td class="lineno" valign="top"></td></tr>
401      <tr><td class="lineno" valign="top"></td><td class="left">   respond with a 304 (Not Modified) response, including the cache-</td><td> </td><td class="right">   respond with a 304 (Not Modified) response, including the cache-</td><td class="lineno" valign="top"></td></tr>
402      <tr><td class="lineno" valign="top"></td><td class="left">   related header fields (particularly ETag) of one of the entities that</td><td> </td><td class="right">   related header fields (particularly ETag) of one of the entities that</td><td class="lineno" valign="top"></td></tr>
403      <tr><td class="lineno" valign="top"></td><td class="left">   matched.  For all other request methods, the server MUST respond with</td><td> </td><td class="right">   matched.  For all other request methods, the server MUST respond with</td><td class="lineno" valign="top"></td></tr>
404      <tr><td class="lineno" valign="top"></td><td class="left">   a status of 412 (Precondition Failed).</td><td> </td><td class="right">   a status of 412 (Precondition Failed).</td><td class="lineno" valign="top"></td></tr>
405      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
406      <tr><td><a name="diff0020" /></td></tr>
407      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">See Section 4 for rules on how to determine if two entity tags match.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
408      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                                         </td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
409      <tr><td class="lineno" valign="top"></td><td class="left">   If none of the entity tags match, then the server MAY perform the</td><td> </td><td class="right">   If none of the entity tags match, then the server MAY perform the</td><td class="lineno" valign="top"></td></tr>
410      <tr><td class="lineno" valign="top"></td><td class="left">   requested method as if the If-None-Match header field did not exist,</td><td> </td><td class="right">   requested method as if the If-None-Match header field did not exist,</td><td class="lineno" valign="top"></td></tr>
411      <tr><td class="lineno" valign="top"></td><td class="left">   but MUST also ignore any If-Modified-Since header field(s) in the</td><td> </td><td class="right">   but MUST also ignore any If-Modified-Since header field(s) in the</td><td class="lineno" valign="top"></td></tr>
412      <tr><td class="lineno" valign="top"></td><td class="left">   request.  That is, if no entity tags match, then the server MUST NOT</td><td> </td><td class="right">   request.  That is, if no entity tags match, then the server MUST NOT</td><td class="lineno" valign="top"></td></tr>
413      <tr><td class="lineno" valign="top"></td><td class="left">   return a 304 (Not Modified) response.</td><td> </td><td class="right">   return a 304 (Not Modified) response.</td><td class="lineno" valign="top"></td></tr>
414      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
415      <tr><td class="lineno" valign="top"></td><td class="left">   If the request would, without the If-None-Match header field, result</td><td> </td><td class="right">   If the request would, without the If-None-Match header field, result</td><td class="lineno" valign="top"></td></tr>
416      <tr><td class="lineno" valign="top"></td><td class="left">   in anything other than a 2xx or 304 status, then the If-None-Match</td><td> </td><td class="right">   in anything other than a 2xx or 304 status, then the If-None-Match</td><td class="lineno" valign="top"></td></tr>
417      <tr><td class="lineno" valign="top"></td><td class="left">   header MUST be ignored.  (See Section 5 for a discussion of server</td><td> </td><td class="right">   header MUST be ignored.  (See Section 5 for a discussion of server</td><td class="lineno" valign="top"></td></tr>
418      <tr><td class="lineno" valign="top"></td><td class="left">   behavior when both If-Modified-Since and If-None-Match appear in the</td><td> </td><td class="right">   behavior when both If-Modified-Since and If-None-Match appear in the</td><td class="lineno" valign="top"></td></tr>
419      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
420      <tr bgcolor="gray" ><td></td><th><a name="part-l13" /><small>skipping to change at</small><em> page 16, line 25</em></th><th> </th><th><a name="part-r13" /><small>skipping to change at</small><em> page 16, line 24</em></th><td></td></tr>
421      <tr><td class="lineno" valign="top"></td><td class="left">     If-None-Match: "xyzzy", "r2d2xxxx", "c3piozzzz"</td><td> </td><td class="right">     If-None-Match: "xyzzy", "r2d2xxxx", "c3piozzzz"</td><td class="lineno" valign="top"></td></tr>
422      <tr><td class="lineno" valign="top"></td><td class="left">     If-None-Match: W/"xyzzy", W/"r2d2xxxx", W/"c3piozzzz"</td><td> </td><td class="right">     If-None-Match: W/"xyzzy", W/"r2d2xxxx", W/"c3piozzzz"</td><td class="lineno" valign="top"></td></tr>
423      <tr><td class="lineno" valign="top"></td><td class="left">     If-None-Match: *</td><td> </td><td class="right">     If-None-Match: *</td><td class="lineno" valign="top"></td></tr>
424      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
425      <tr><td class="lineno" valign="top"></td><td class="left">   The result of a request having both an If-None-Match header field and</td><td> </td><td class="right">   The result of a request having both an If-None-Match header field and</td><td class="lineno" valign="top"></td></tr>
426      <tr><td class="lineno" valign="top"></td><td class="left">   either an If-Match or an If-Unmodified-Since header fields is</td><td> </td><td class="right">   either an If-Match or an If-Unmodified-Since header fields is</td><td class="lineno" valign="top"></td></tr>
427      <tr><td class="lineno" valign="top"></td><td class="left">   undefined by this specification.</td><td> </td><td class="right">   undefined by this specification.</td><td class="lineno" valign="top"></td></tr>
428      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
429      <tr><td class="lineno" valign="top"></td><td class="left">6.5.  If-Unmodified-Since</td><td> </td><td class="right">6.5.  If-Unmodified-Since</td><td class="lineno" valign="top"></td></tr>
430      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
431      <tr><td><a name="diff0021" /></td></tr>
432      <tr><td class="lineno" valign="top"></td><td class="lblock">   The request-header field <span class="delete">"If-Unmodified-Since"</span> is used <span class="delete">with a method</span></td><td> </td><td class="rblock">   The <span class="insert">"If-Unmodified-Since"</span> request-header field is used to make <span class="insert">a</span></td><td class="lineno" valign="top"></td></tr>
433      <tr><td class="lineno" valign="top"></td><td class="lblock">   to make <span class="delete">it</span> conditional.  If the requested resource has not been</td><td> </td><td class="rblock"><span class="insert">   request method</span> conditional.  If the requested resource has not been</td><td class="lineno" valign="top"></td></tr>
434      <tr><td class="lineno" valign="top"></td><td class="left">   modified since the time specified in this field, the server SHOULD</td><td> </td><td class="right">   modified since the time specified in this field, the server SHOULD</td><td class="lineno" valign="top"></td></tr>
435      <tr><td class="lineno" valign="top"></td><td class="left">   perform the requested operation as if the If-Unmodified-Since header</td><td> </td><td class="right">   perform the requested operation as if the If-Unmodified-Since header</td><td class="lineno" valign="top"></td></tr>
436      <tr><td class="lineno" valign="top"></td><td class="left">   were not present.</td><td> </td><td class="right">   were not present.</td><td class="lineno" valign="top"></td></tr>
437      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
438      <tr><td class="lineno" valign="top"></td><td class="left">   If the requested variant has been modified since the specified time,</td><td> </td><td class="right">   If the requested variant has been modified since the specified time,</td><td class="lineno" valign="top"></td></tr>
439      <tr><td class="lineno" valign="top"></td><td class="left">   the server MUST NOT perform the requested operation, and MUST return</td><td> </td><td class="right">   the server MUST NOT perform the requested operation, and MUST return</td><td class="lineno" valign="top"></td></tr>
440      <tr><td class="lineno" valign="top"></td><td class="left">   a 412 (Precondition Failed).</td><td> </td><td class="right">   a 412 (Precondition Failed).</td><td class="lineno" valign="top"></td></tr>
441      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
442      <tr><td class="lineno" valign="top"></td><td class="left">     If-Unmodified-Since   = "If-Unmodified-Since" ":" OWS</td><td> </td><td class="right">     If-Unmodified-Since   = "If-Unmodified-Since" ":" OWS</td><td class="lineno" valign="top"></td></tr>
443      <tr><td class="lineno" valign="top"></td><td class="left">                             If-Unmodified-Since-v</td><td> </td><td class="right">                             If-Unmodified-Since-v</td><td class="lineno" valign="top"></td></tr>
444      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
445      <tr bgcolor="gray" ><td></td><th><a name="part-l14" /><small>skipping to change at</small><em> page 17, line 7</em></th><th> </th><th><a name="part-r14" /><small>skipping to change at</small><em> page 17, line 7</em></th><td></td></tr>
446      <tr><td class="lineno" valign="top"></td><td class="left">   If-Unmodified-Since header SHOULD be ignored.</td><td> </td><td class="right">   If-Unmodified-Since header SHOULD be ignored.</td><td class="lineno" valign="top"></td></tr>
447      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
448      <tr><td class="lineno" valign="top"></td><td class="left">   If the specified date is invalid, the header is ignored.</td><td> </td><td class="right">   If the specified date is invalid, the header is ignored.</td><td class="lineno" valign="top"></td></tr>
449      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
450      <tr><td class="lineno" valign="top"></td><td class="left">   The result of a request having both an If-Unmodified-Since header</td><td> </td><td class="right">   The result of a request having both an If-Unmodified-Since header</td><td class="lineno" valign="top"></td></tr>
451      <tr><td class="lineno" valign="top"></td><td class="left">   field and either an If-None-Match or an If-Modified-Since header</td><td> </td><td class="right">   field and either an If-None-Match or an If-Modified-Since header</td><td class="lineno" valign="top"></td></tr>
452      <tr><td class="lineno" valign="top"></td><td class="left">   fields is undefined by this specification.</td><td> </td><td class="right">   fields is undefined by this specification.</td><td class="lineno" valign="top"></td></tr>
453      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
454      <tr><td class="lineno" valign="top"></td><td class="left">6.6.  Last-Modified</td><td> </td><td class="right">6.6.  Last-Modified</td><td class="lineno" valign="top"></td></tr>
455      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
456      <tr><td><a name="diff0022" /></td></tr>
457      <tr><td class="lineno" valign="top"></td><td class="lblock">   The <span class="delete">entity-header field "Last-Modified"</span> indicates the date and time</td><td> </td><td class="rblock">   The <span class="insert">"Last-Modified" entity-header field</span> indicates the date and time</td><td class="lineno" valign="top"></td></tr>
458      <tr><td class="lineno" valign="top"></td><td class="left">   at which the origin server believes the variant was last modified.</td><td> </td><td class="right">   at which the origin server believes the variant was last modified.</td><td class="lineno" valign="top"></td></tr>
459      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
460      <tr><td class="lineno" valign="top"></td><td class="left">     Last-Modified   = "Last-Modified" ":" OWS Last-Modified-v</td><td> </td><td class="right">     Last-Modified   = "Last-Modified" ":" OWS Last-Modified-v</td><td class="lineno" valign="top"></td></tr>
461      <tr><td class="lineno" valign="top"></td><td class="left">     Last-Modified-v = HTTP-date</td><td> </td><td class="right">     Last-Modified-v = HTTP-date</td><td class="lineno" valign="top"></td></tr>
462      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
463      <tr><td class="lineno" valign="top"></td><td class="left">   An example of its use is</td><td> </td><td class="right">   An example of its use is</td><td class="lineno" valign="top"></td></tr>
464      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
465      <tr><td class="lineno" valign="top"></td><td class="left">     Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT</td><td> </td><td class="right">     Last-Modified: Tue, 15 Nov 1994 12:45:26 GMT</td><td class="lineno" valign="top"></td></tr>
466      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
467      <tr><td class="lineno" valign="top"></td><td class="left">   The exact meaning of this header field depends on the implementation</td><td> </td><td class="right">   The exact meaning of this header field depends on the implementation</td><td class="lineno" valign="top"></td></tr>
468      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
469      <tr bgcolor="gray" ><td></td><th><a name="part-l15" /><small>skipping to change at</small><em> page 17, line 46</em></th><th> </th><th><a name="part-r15" /><small>skipping to change at</small><em> page 17, line 46</em></th><td></td></tr>
470      <tr><td class="lineno" valign="top"></td><td class="left">   near the time that the response is generated.</td><td> </td><td class="right">   near the time that the response is generated.</td><td class="lineno" valign="top"></td></tr>
471      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
472      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP/1.1 servers SHOULD send Last-Modified whenever feasible.</td><td> </td><td class="right">   HTTP/1.1 servers SHOULD send Last-Modified whenever feasible.</td><td class="lineno" valign="top"></td></tr>
473      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
474      <tr><td class="lineno" valign="top"></td><td class="left">   The Last-Modified entity-header field value is often used as a cache</td><td> </td><td class="right">   The Last-Modified entity-header field value is often used as a cache</td><td class="lineno" valign="top"></td></tr>
475      <tr><td class="lineno" valign="top"></td><td class="left">   validator.  In simple terms, a cache entry is considered to be valid</td><td> </td><td class="right">   validator.  In simple terms, a cache entry is considered to be valid</td><td class="lineno" valign="top"></td></tr>
476      <tr><td class="lineno" valign="top"></td><td class="left">   if the entity has not been modified since the Last-Modified value.</td><td> </td><td class="right">   if the entity has not been modified since the Last-Modified value.</td><td class="lineno" valign="top"></td></tr>
477      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
478      <tr><td class="lineno" valign="top"></td><td class="left">7.  IANA Considerations</td><td> </td><td class="right">7.  IANA Considerations</td><td class="lineno" valign="top"></td></tr>
479      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
480      <tr><td><a name="diff0023" /></td></tr>
481      <tr><td class="lineno" valign="top"></td><td class="lblock">7.1.  Message Header Registration</td><td> </td><td class="rblock">7.1.  <span class="insert">Status Code Registration</span></td><td class="lineno" valign="top"></td></tr>
482      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
483      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The HTTP Status Code Registry located at</span></td><td class="lineno" valign="top"></td></tr>
484      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   &lt;http://www.iana.org/assignments/http-status-codes&gt; should be updated</span></td><td class="lineno" valign="top"></td></tr>
485      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   with the registrations below:</span></td><td class="lineno" valign="top"></td></tr>
486      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
487      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   +-------+---------------------+-------------+</span></td><td class="lineno" valign="top"></td></tr>
488      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | Value | Description         | Reference   |</span></td><td class="lineno" valign="top"></td></tr>
489      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   +-------+---------------------+-------------+</span></td><td class="lineno" valign="top"></td></tr>
490      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 304   | Not Modified        | Section 3.1 |</span></td><td class="lineno" valign="top"></td></tr>
491      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 412   | Precondition Failed | Section 3.2 |</span></td><td class="lineno" valign="top"></td></tr>
492      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   +-------+---------------------+-------------+</span></td><td class="lineno" valign="top"></td></tr>
493      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
494      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">7.2.</span>  Message Header Registration</td><td class="lineno" valign="top"></td></tr>
495      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
496      <tr><td class="lineno" valign="top"></td><td class="left">   The Message Header Registry located at &lt;http://www.iana.org/</td><td> </td><td class="right">   The Message Header Registry located at &lt;http://www.iana.org/</td><td class="lineno" valign="top"></td></tr>
497      <tr><td class="lineno" valign="top"></td><td class="left">   assignments/message-headers/message-header-index.html&gt; should be</td><td> </td><td class="right">   assignments/message-headers/message-header-index.html&gt; should be</td><td class="lineno" valign="top"></td></tr>
498      <tr><td class="lineno" valign="top"></td><td class="left">   updated with the permanent registrations below (see [RFC3864]):</td><td> </td><td class="right">   updated with the permanent registrations below (see [RFC3864]):</td><td class="lineno" valign="top"></td></tr>
499      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
500      <tr><td class="lineno" valign="top"></td><td class="left">   +---------------------+----------+----------+-------------+</td><td> </td><td class="right">   +---------------------+----------+----------+-------------+</td><td class="lineno" valign="top"></td></tr>
501      <tr><td class="lineno" valign="top"></td><td class="left">   | Header Field Name   | Protocol | Status   | Reference   |</td><td> </td><td class="right">   | Header Field Name   | Protocol | Status   | Reference   |</td><td class="lineno" valign="top"></td></tr>
502      <tr><td class="lineno" valign="top"></td><td class="left">   +---------------------+----------+----------+-------------+</td><td> </td><td class="right">   +---------------------+----------+----------+-------------+</td><td class="lineno" valign="top"></td></tr>
503      <tr><td class="lineno" valign="top"></td><td class="left">   | ETag                | http     | standard | Section 6.1 |</td><td> </td><td class="right">   | ETag                | http     | standard | Section 6.1 |</td><td class="lineno" valign="top"></td></tr>
504      <tr><td class="lineno" valign="top"></td><td class="left">   | If-Match            | http     | standard | Section 6.2 |</td><td> </td><td class="right">   | If-Match            | http     | standard | Section 6.2 |</td><td class="lineno" valign="top"></td></tr>
505      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
506      <tr bgcolor="gray" ><td></td><th><a name="part-l16" /><small>skipping to change at</small><em> page 18, line 33</em></th><th> </th><th><a name="part-r16" /><small>skipping to change at</small><em> page 18, line 46</em></th><td></td></tr>
507      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
508      <tr><td class="lineno" valign="top"></td><td class="left">9.  Acknowledgments</td><td> </td><td class="right">9.  Acknowledgments</td><td class="lineno" valign="top"></td></tr>
509      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
510      <tr><td class="lineno" valign="top"></td><td class="left">10.  References</td><td> </td><td class="right">10.  References</td><td class="lineno" valign="top"></td></tr>
511      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
512      <tr><td class="lineno" valign="top"></td><td class="left">10.1.  Normative References</td><td> </td><td class="right">10.1.  Normative References</td><td class="lineno" valign="top"></td></tr>
513      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
514      <tr><td class="lineno" valign="top"></td><td class="left">   [Part1]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part1]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
515      <tr><td class="lineno" valign="top"></td><td class="left">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td> </td><td class="right">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td class="lineno" valign="top"></td></tr>
516      <tr><td class="lineno" valign="top"></td><td class="left">              and J. Reschke, Ed., "HTTP/1.1, part 1: URIs, Connections,</td><td> </td><td class="right">              and J. Reschke, Ed., "HTTP/1.1, part 1: URIs, Connections,</td><td class="lineno" valign="top"></td></tr>
517      <tr><td><a name="diff0024" /></td></tr>
518      <tr><td class="lineno" valign="top"></td><td class="lblock">              and Message Parsing", <span class="delete">draft-ietf-httpbis-p1-messaging-07</span></td><td> </td><td class="rblock">              and Message Parsing", <span class="insert">draft-ietf-httpbis-p1-messaging-08</span></td><td class="lineno" valign="top"></td></tr>
519      <tr><td class="lineno" valign="top"></td><td class="lblock">              (work in progress), <span class="delete">July</span> 2009.</td><td> </td><td class="rblock">              (work in progress), <span class="insert">October</span> 2009.</td><td class="lineno" valign="top"></td></tr>
520      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
521      <tr><td class="lineno" valign="top"></td><td class="left">   [Part5]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part5]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
522      <tr><td class="lineno" valign="top"></td><td class="left">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td> </td><td class="right">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td class="lineno" valign="top"></td></tr>
523      <tr><td class="lineno" valign="top"></td><td class="left">              and J. Reschke, Ed., "HTTP/1.1, part 5: Range Requests and</td><td> </td><td class="right">              and J. Reschke, Ed., "HTTP/1.1, part 5: Range Requests and</td><td class="lineno" valign="top"></td></tr>
524      <tr><td><a name="diff0025" /></td></tr>
525      <tr><td class="lineno" valign="top"></td><td class="lblock">              Partial Responses", <span class="delete">draft-ietf-httpbis-p5-range-07</span> (work</td><td> </td><td class="rblock">              Partial Responses", <span class="insert">draft-ietf-httpbis-p5-range-08</span> (work</td><td class="lineno" valign="top"></td></tr>
526      <tr><td class="lineno" valign="top"></td><td class="lblock">              in progress), <span class="delete">July</span> 2009.</td><td> </td><td class="rblock">              in progress), <span class="insert">October</span> 2009.</td><td class="lineno" valign="top"></td></tr>
527      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
528      <tr><td class="lineno" valign="top"></td><td class="left">   [Part6]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part6]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
529      <tr><td class="lineno" valign="top"></td><td class="left">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td> </td><td class="right">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td class="lineno" valign="top"></td></tr>
530      <tr><td class="lineno" valign="top"></td><td class="left">              Nottingham, M., Ed., and J. Reschke, Ed., "HTTP/1.1, part</td><td> </td><td class="right">              Nottingham, M., Ed., and J. Reschke, Ed., "HTTP/1.1, part</td><td class="lineno" valign="top"></td></tr>
531      <tr><td><a name="diff0026" /></td></tr>
532      <tr><td class="lineno" valign="top"></td><td class="lblock">              6: Caching", <span class="delete">draft-ietf-httpbis-p6-cache-07</span> (work in</td><td> </td><td class="rblock">              6: Caching", <span class="insert">draft-ietf-httpbis-p6-cache-08</span> (work in</td><td class="lineno" valign="top"></td></tr>
533      <tr><td class="lineno" valign="top"></td><td class="lblock">              progress), <span class="delete">July</span> 2009.</td><td> </td><td class="rblock">              progress), <span class="insert">October</span> 2009.</td><td class="lineno" valign="top"></td></tr>
534      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
535      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate</td><td> </td><td class="right">   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate</td><td class="lineno" valign="top"></td></tr>
536      <tr><td class="lineno" valign="top"></td><td class="left">              Requirement Levels", BCP 14, RFC 2119, March 1997.</td><td> </td><td class="right">              Requirement Levels", BCP 14, RFC 2119, March 1997.</td><td class="lineno" valign="top"></td></tr>
537      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
538      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax</td><td> </td><td class="right">   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax</td><td class="lineno" valign="top"></td></tr>
539      <tr><td class="lineno" valign="top"></td><td class="left">              Specifications: ABNF", STD 68, RFC 5234, January 2008.</td><td> </td><td class="right">              Specifications: ABNF", STD 68, RFC 5234, January 2008.</td><td class="lineno" valign="top"></td></tr>
540      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
541      <tr><td class="lineno" valign="top"></td><td class="left">10.2.  Informative References</td><td> </td><td class="right">10.2.  Informative References</td><td class="lineno" valign="top"></td></tr>
542      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
543      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
544      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
545      <tr bgcolor="gray" ><td></td><th><a name="part-l17" /><small>skipping to change at</small><em> page 20, line 10</em></th><th> </th><th><a name="part-r17" /><small>skipping to change at</small><em> page 20, line 10</em></th><td></td></tr>
546      <tr><td class="lineno" valign="top"></td><td class="left">A.1.  Changes from RFC 2616</td><td> </td><td class="right">A.1.  Changes from RFC 2616</td><td class="lineno" valign="top"></td></tr>
547      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
548      <tr><td class="lineno" valign="top"></td><td class="left">   Allow weak entity tags in all requests except range requests</td><td> </td><td class="right">   Allow weak entity tags in all requests except range requests</td><td class="lineno" valign="top"></td></tr>
549      <tr><td class="lineno" valign="top"></td><td class="left">   (Sections 4 and 6.4).</td><td> </td><td class="right">   (Sections 4 and 6.4).</td><td class="lineno" valign="top"></td></tr>
550      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
551      <tr><td class="lineno" valign="top"></td><td class="left">Appendix B.  Collected ABNF</td><td> </td><td class="right">Appendix B.  Collected ABNF</td><td class="lineno" valign="top"></td></tr>
552      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
553      <tr><td class="lineno" valign="top"></td><td class="left">   ETag = "ETag:" OWS ETag-v</td><td> </td><td class="right">   ETag = "ETag:" OWS ETag-v</td><td class="lineno" valign="top"></td></tr>
554      <tr><td class="lineno" valign="top"></td><td class="left">   ETag-v = entity-tag</td><td> </td><td class="right">   ETag-v = entity-tag</td><td class="lineno" valign="top"></td></tr>
555      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
556      <tr><td><a name="diff0027" /></td></tr>
557      <tr><td class="lineno" valign="top"></td><td class="lblock">   HTTP-date = &lt;HTTP-date, defined in [Part1], Section <span class="delete">3.2</span>&gt;</td><td> </td><td class="rblock">   HTTP-date = &lt;HTTP-date, defined in [Part1], Section <span class="insert">6.1</span>&gt;</td><td class="lineno" valign="top"></td></tr>
558      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
559      <tr><td class="lineno" valign="top"></td><td class="left">   If-Match = "If-Match:" OWS If-Match-v</td><td> </td><td class="right">   If-Match = "If-Match:" OWS If-Match-v</td><td class="lineno" valign="top"></td></tr>
560      <tr><td class="lineno" valign="top"></td><td class="left">   If-Match-v = "*" / ( *( "," OWS ) entity-tag *( OWS "," [ OWS</td><td> </td><td class="right">   If-Match-v = "*" / ( *( "," OWS ) entity-tag *( OWS "," [ OWS</td><td class="lineno" valign="top"></td></tr>
561      <tr><td class="lineno" valign="top"></td><td class="left">    entity-tag ] ) )</td><td> </td><td class="right">    entity-tag ] ) )</td><td class="lineno" valign="top"></td></tr>
562      <tr><td class="lineno" valign="top"></td><td class="left">   If-Modified-Since = "If-Modified-Since:" OWS If-Modified-Since-v</td><td> </td><td class="right">   If-Modified-Since = "If-Modified-Since:" OWS If-Modified-Since-v</td><td class="lineno" valign="top"></td></tr>
563      <tr><td class="lineno" valign="top"></td><td class="left">   If-Modified-Since-v = HTTP-date</td><td> </td><td class="right">   If-Modified-Since-v = HTTP-date</td><td class="lineno" valign="top"></td></tr>
564      <tr><td class="lineno" valign="top"></td><td class="left">   If-None-Match = "If-None-Match:" OWS If-None-Match-v</td><td> </td><td class="right">   If-None-Match = "If-None-Match:" OWS If-None-Match-v</td><td class="lineno" valign="top"></td></tr>
565      <tr><td class="lineno" valign="top"></td><td class="left">   If-None-Match-v = "*" / ( *( "," OWS ) entity-tag *( OWS "," [ OWS</td><td> </td><td class="right">   If-None-Match-v = "*" / ( *( "," OWS ) entity-tag *( OWS "," [ OWS</td><td class="lineno" valign="top"></td></tr>
566      <tr><td class="lineno" valign="top"></td><td class="left">    entity-tag ] ) )</td><td> </td><td class="right">    entity-tag ] ) )</td><td class="lineno" valign="top"></td></tr>
567      <tr><td class="lineno" valign="top"></td><td class="left">   If-Unmodified-Since = "If-Unmodified-Since:" OWS</td><td> </td><td class="right">   If-Unmodified-Since = "If-Unmodified-Since:" OWS</td><td class="lineno" valign="top"></td></tr>
568      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
569      <tr bgcolor="gray" ><td></td><th><a name="part-l18" /><small>skipping to change at</small><em> page 22, line 33</em></th><th> </th><th><a name="part-r18" /><small>skipping to change at</small><em> page 22, line 33</em></th><td></td></tr>
570      <tr><td class="lineno" valign="top"></td><td class="left">   o  Add appendix containing collected and expanded ABNF, reorganize</td><td> </td><td class="right">   o  Add appendix containing collected and expanded ABNF, reorganize</td><td class="lineno" valign="top"></td></tr>
571      <tr><td class="lineno" valign="top"></td><td class="left">      ABNF introduction.</td><td> </td><td class="right">      ABNF introduction.</td><td class="lineno" valign="top"></td></tr>
572      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
573      <tr><td class="lineno" valign="top"></td><td class="left">C.8.  Since draft-ietf-httpbis-p4-conditional-06</td><td> </td><td class="right">C.8.  Since draft-ietf-httpbis-p4-conditional-06</td><td class="lineno" valign="top"></td></tr>
574      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
575      <tr><td class="lineno" valign="top"></td><td class="left">   Closed issues:</td><td> </td><td class="right">   Closed issues:</td><td class="lineno" valign="top"></td></tr>
576      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
577      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/153&gt;: "case-</td><td> </td><td class="right">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/153&gt;: "case-</td><td class="lineno" valign="top"></td></tr>
578      <tr><td class="lineno" valign="top"></td><td class="left">      sensitivity of etag weakness indicator"</td><td> </td><td class="right">      sensitivity of etag weakness indicator"</td><td class="lineno" valign="top"></td></tr>
579      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
580      <tr><td><a name="diff0028" /></td></tr>
581      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">C.9.  Since draft-ietf-httpbis-p4-conditional-07</span></td><td class="lineno" valign="top"></td></tr>
582      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
583      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Closed issues:</span></td><td class="lineno" valign="top"></td></tr>
584      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
585      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/116&gt;: "Weak ETags on</span></td><td class="lineno" valign="top"></td></tr>
586      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      non-GET requests" (If-Match still was defined to require strong</span></td><td class="lineno" valign="top"></td></tr>
587      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      matching)</span></td><td class="lineno" valign="top"></td></tr>
588      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
589      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/198&gt;: "move IANA</span></td><td class="lineno" valign="top"></td></tr>
590      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      registrations for optional status codes"</span></td><td class="lineno" valign="top"></td></tr>
591      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
592      <tr><td class="lineno" valign="top"></td><td class="left">Index</td><td> </td><td class="right">Index</td><td class="lineno" valign="top"></td></tr>
593      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
594      <tr><td class="lineno" valign="top"></td><td class="left">   3</td><td> </td><td class="right">   3</td><td class="lineno" valign="top"></td></tr>
595      <tr><td class="lineno" valign="top"></td><td class="left">      304 Not Modified (status code)  6</td><td> </td><td class="right">      304 Not Modified (status code)  6</td><td class="lineno" valign="top"></td></tr>
596      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
597      <tr><td class="lineno" valign="top"></td><td class="left">   4</td><td> </td><td class="right">   4</td><td class="lineno" valign="top"></td></tr>
598      <tr><td class="lineno" valign="top"></td><td class="left">      412 Precondition Failed (status code)  6</td><td> </td><td class="right">      412 Precondition Failed (status code)  6</td><td class="lineno" valign="top"></td></tr>
599      <tr><td><a name="diff0029" /></td></tr>
600      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">                                                                         </span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
601      <tr><td class="lineno" valign="top"></td><td class="left">   E</td><td> </td><td class="right">   E</td><td class="lineno" valign="top"></td></tr>
602      <tr><td class="lineno" valign="top"></td><td class="left">      ETag header  11</td><td> </td><td class="right">      ETag header  11</td><td class="lineno" valign="top"></td></tr>
603      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
604      <tr><td class="lineno" valign="top"></td><td class="left">   G</td><td> </td><td class="right">   G</td><td class="lineno" valign="top"></td></tr>
605      <tr><td class="lineno" valign="top"></td><td class="left">      Grammar</td><td> </td><td class="right">      Grammar</td><td class="lineno" valign="top"></td></tr>
606      <tr><td class="lineno" valign="top"></td><td class="left">         entity-tag  5</td><td> </td><td class="right">         entity-tag  5</td><td class="lineno" valign="top"></td></tr>
607      <tr><td class="lineno" valign="top"></td><td class="left">         ETag  11</td><td> </td><td class="right">         ETag  11</td><td class="lineno" valign="top"></td></tr>
608      <tr><td class="lineno" valign="top"></td><td class="left">         ETag-v  11</td><td> </td><td class="right">         ETag-v  11</td><td class="lineno" valign="top"></td></tr>
609      <tr><td class="lineno" valign="top"></td><td class="left">         If-Match  12</td><td> </td><td class="right">         If-Match  12</td><td class="lineno" valign="top"></td></tr>
610      <tr><td class="lineno" valign="top"></td><td class="left">         If-Match-v  12</td><td> </td><td class="right">         If-Match-v  12</td><td class="lineno" valign="top"></td></tr>
611
612     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
613     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 29 change blocks.&nbsp;</a></th></tr>
614     <tr class="stats"><td></td><th><i>48 lines changed or deleted</i></th><th><i> </i></th><th><i>71 lines changed or added</i></th><td></td></tr>
615     <tr><td colspan="5" align="center" class="small"><br/>This html diff was produced by rfcdiff 1.35. The latest version is available from <a href="http://www.tools.ietf.org/tools/rfcdiff/" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>
616   </table>
617   </body>
618   </html>
Note: See TracBrowser for help on using the repository browser.