source: draft-ietf-httpbis/diffs/draft-ietf-httpbis-p4-conditional-05-from-4.diff.html @ 841

Last change on this file since 841 was 547, checked in by julian.reschke@…, 11 years ago

Prepare submission of draft -06 on Monday, March 09.

  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/html; charset=iso-8859-1
File size: 113.3 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 1.34: rfcdiff  --> 
3<!-- <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional" > -->
4<!-- System: CYGWIN_NT-5.1 snowball 1.5.19(0.150/4/2) 2006-01-20 13:28 i686 Cygwin --> 
5<!-- Using awk: /usr/bin/gawk: GNU Awk 3.1.5 --> 
6<!-- Using diff: /usr/bin/diff: diff (GNU diffutils) 2.8.7 --> 
7<!-- Using wdiff: :  --> 
8<html> 
9<head> 
10  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> 
11  <meta http-equiv="Content-Style-Type" content="text/css" /> 
12  <title>Diff: draft-ietf-httpbis-p4-conditional-04.txt - draft-ietf-httpbis-p4-conditional-05.txt</title> 
13  <style type="text/css"> 
14    body    { margin: 0.4ex; margin-right: auto; } 
15    tr      { } 
16    td      { white-space: pre; font-family: monospace; vertical-align: top; font-size: 0.86em;} 
17    th      { font-size: 0.86em; } 
18    .small  { font-size: 0.6em; font-style: italic; font-family: Verdana, Helvetica, sans-serif; } 
19    .left   { background-color: #EEE; } 
20    .right  { background-color: #FFF; } 
21    .diff   { background-color: #CCF; } 
22    .lblock { background-color: #BFB; } 
23    .rblock { background-color: #FF8; } 
24    .insert { background-color: #8FF; } 
25    .delete { background-color: #ACF; } 
26    .void   { background-color: #FFB; } 
27    .cont   { background-color: #EEE; } 
28    .linebr { background-color: #AAA; } 
29    .lineno { color: red; background-color: #FFF; font-size: 0.7em; text-align: right; padding: 0 2px; } 
30    .elipsis{ background-color: #AAA; } 
31    .left .cont { background-color: #DDD; } 
32    .right .cont { background-color: #EEE; } 
33    .lblock .cont { background-color: #9D9; } 
34    .rblock .cont { background-color: #DD6; } 
35    .insert .cont { background-color: #0DD; } 
36    .delete .cont { background-color: #8AD; } 
37    .stats, .stats td, .stats th { background-color: #EEE; padding: 2px 0; } 
38  </style> 
39</head> 
40<body > 
41  <table border="0" cellpadding="0" cellspacing="0"> 
42  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p4-conditional-04.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p4-conditional-05.txt&nbsp;</th><th></th></tr> 
43      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
44      <tr><td class="lineno" valign="top"></td><td class="left">Network Working Group                                   R. Fielding, Ed.</td><td> </td><td class="right">Network Working Group                                   R. Fielding, Ed.</td><td class="lineno" valign="top"></td></tr>
45      <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>
46      <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>
47      <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>
48      <tr><td><a name="diff0001" /></td></tr>
49      <tr><td class="lineno" valign="top"></td><td class="lblock">Expires: Ma<span class="delete">rch 2, 2009</span>                                          J. Mogul</td><td> </td><td class="rblock">Expires: Ma<span class="insert">y 20, 2009 </span>                                          J. Mogul</td><td class="lineno" valign="top"></td></tr>
50      <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>
51      <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>
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">                                                             L. Masinter</td><td> </td><td class="right">                                                             L. Masinter</td><td class="lineno" valign="top"></td></tr>
54      <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>
55      <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>
56      <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>
57      <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>
58      <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>
59      <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>
60      <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>
61      <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>
62      <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>
63      <tr><td><a name="diff0002" /></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                       <span class="delete">  August 29</span>, 2008</td><td> </td><td class="rblock">                                                       <span class="insert">November 16</span>, 2008</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">                 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>
67      <tr><td><a name="diff0003" /></td></tr>
68      <tr><td class="lineno" valign="top"></td><td class="lblock">                  draft-ietf-httpbis-p4-conditional-0<span class="delete">4</span></td><td> </td><td class="rblock">                  draft-ietf-httpbis-p4-conditional-0<span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
69      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
70      <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>
71      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
72      <tr><td class="lineno" valign="top"></td><td class="left">   By submitting this Internet-Draft, each author represents that any</td><td> </td><td class="right">   By submitting this Internet-Draft, each author represents that any</td><td class="lineno" valign="top"></td></tr>
73      <tr><td class="lineno" valign="top"></td><td class="left">   applicable patent or other IPR claims of which he or she is aware</td><td> </td><td class="right">   applicable patent or other IPR claims of which he or she is aware</td><td class="lineno" valign="top"></td></tr>
74      <tr><td class="lineno" valign="top"></td><td class="left">   have been or will be disclosed, and any of which he or she becomes</td><td> </td><td class="right">   have been or will be disclosed, and any of which he or she becomes</td><td class="lineno" valign="top"></td></tr>
75      <tr><td class="lineno" valign="top"></td><td class="left">   aware will be disclosed, in accordance with Section 6 of BCP 79.</td><td> </td><td class="right">   aware will be disclosed, in accordance with Section 6 of BCP 79.</td><td class="lineno" valign="top"></td></tr>
76      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
77      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are working documents of the Internet Engineering</td><td> </td><td class="right">   Internet-Drafts are working documents of the Internet Engineering</td><td class="lineno" valign="top"></td></tr>
78      <tr><td class="lineno" valign="top"></td><td class="left">   Task Force (IETF), its areas, and its working groups.  Note that</td><td> </td><td class="right">   Task Force (IETF), its areas, and its working groups.  Note that</td><td class="lineno" valign="top"></td></tr>
79      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
80      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 1, line 49</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 1, line 49</em></th><td></td></tr>
81      <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>
82      <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>
83      <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>
84      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
85      <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>
86      <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>
87      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
88      <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>
89      <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>
90      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
91      <tr><td><a name="diff0004" /></td></tr>
92      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on Ma<span class="delete">rch 2</span>, 2009.</td><td> </td><td class="rblock">   This Internet-Draft will expire on Ma<span class="insert">y 20</span>, 2009.</td><td class="lineno" valign="top"></td></tr>
93      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
94      <tr><td class="lineno" valign="top"></td><td class="left">Abstract</td><td> </td><td class="right">Abstract</td><td class="lineno" valign="top"></td></tr>
95      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
96      <tr><td class="lineno" valign="top"></td><td class="left">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td> </td><td class="right">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td class="lineno" valign="top"></td></tr>
97      <tr><td class="lineno" valign="top"></td><td class="left">   protocol for distributed, collaborative, hypermedia information</td><td> </td><td class="right">   protocol for distributed, collaborative, hypermedia information</td><td class="lineno" valign="top"></td></tr>
98      <tr><td class="lineno" valign="top"></td><td class="left">   systems.  HTTP has been in use by the World Wide Web global</td><td> </td><td class="right">   systems.  HTTP has been in use by the World Wide Web global</td><td class="lineno" valign="top"></td></tr>
99      <tr><td class="lineno" valign="top"></td><td class="left">   information initiative since 1990.  This document is Part 4 of the</td><td> </td><td class="right">   information initiative since 1990.  This document is Part 4 of the</td><td class="lineno" valign="top"></td></tr>
100      <tr><td class="lineno" valign="top"></td><td class="left">   seven-part specification that defines the protocol referred to as</td><td> </td><td class="right">   seven-part specification that defines the protocol referred to as</td><td class="lineno" valign="top"></td></tr>
101      <tr><td class="lineno" valign="top"></td><td class="left">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.  Part 4 defines</td><td> </td><td class="right">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.  Part 4 defines</td><td class="lineno" valign="top"></td></tr>
102      <tr><td class="lineno" valign="top"></td><td class="left">   request header fields for indicating conditional requests and the</td><td> </td><td class="right">   request header fields for indicating conditional requests and the</td><td class="lineno" valign="top"></td></tr>
103      <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>
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">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>
106      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
107      <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>
108      <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>
109      <tr><td><a name="diff0005" /></td></tr>
110      <tr><td class="lineno" valign="top"></td><td class="lblock">   at &lt;http://<span class="delete">www.</span>tools.ietf.org/wg/httpbis/trac/report/11&gt; and related</td><td> </td><td class="rblock">   at &lt;http://tools.ietf.org/wg/httpbis/trac/report/11&gt; and related</td><td class="lineno" valign="top"></td></tr>
111      <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>
112      <tr><td><a name="diff0006" /></td></tr>
113      <tr><td class="lineno" valign="top"></td><td class="lblock">   &lt;http://<span class="delete">www.</span>tools.ietf.org/wg/httpbis/&gt;.</td><td> </td><td class="rblock">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td class="lineno" valign="top"></td></tr>
114      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
115      <tr><td><a name="diff0007" /></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="lblock">   The changes in this draft are summarized in Appendix B.<span class="delete">4</span>.</td><td> </td><td class="rblock">   The changes in this draft are summarized in Appendix B.<span class="insert">6</span>.</td><td class="lineno" valign="top"></td></tr>
117      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
118      <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>
119      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
120      <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>
121      <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>
122      <tr><td class="lineno" valign="top"></td><td class="left">   2.  Notational Conventions and Generic Grammar . . . . . . . . . .  4</td><td> </td><td class="right">   2.  Notational Conventions and Generic Grammar . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
123      <tr><td class="lineno" valign="top"></td><td class="left">   3.  Entity Tags  . . . . . . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">   3.  Entity Tags  . . . . . . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
124      <tr><td class="lineno" valign="top"></td><td class="left">   4.  Status Code Definitions  . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">   4.  Status Code Definitions  . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
125      <tr><td class="lineno" valign="top"></td><td class="left">     4.1.  304 Not Modified . . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">     4.1.  304 Not Modified . . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
126      <tr><td class="lineno" valign="top"></td><td class="left">     4.2.  412 Precondition Failed  . . . . . . . . . . . . . . . . .  6</td><td> </td><td class="right">     4.2.  412 Precondition Failed  . . . . . . . . . . . . . . . . .  6</td><td class="lineno" valign="top"></td></tr>
127      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
128      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 3, line 25</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 3, line 25</em></th><td></td></tr>
129      <tr><td class="lineno" valign="top"></td><td class="left">   6.  Rules for When to Use Entity Tags and Last-Modified Dates  . .  9</td><td> </td><td class="right">   6.  Rules for When to Use Entity Tags and Last-Modified Dates  . .  9</td><td class="lineno" valign="top"></td></tr>
130      <tr><td class="lineno" valign="top"></td><td class="left">   7.  Header Field Definitions . . . . . . . . . . . . . . . . . . . 11</td><td> </td><td class="right">   7.  Header Field Definitions . . . . . . . . . . . . . . . . . . . 11</td><td class="lineno" valign="top"></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="left">     7.1.  ETag . . . . . . . . . . . . . . . . . . . . . . . . . . . 11</td><td> </td><td class="right">     7.1.  ETag . . . . . . . . . . . . . . . . . . . . . . . . . . . 11</td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="left">     7.2.  If-Match . . . . . . . . . . . . . . . . . . . . . . . . . 12</td><td> </td><td class="right">     7.2.  If-Match . . . . . . . . . . . . . . . . . . . . . . . . . 12</td><td class="lineno" valign="top"></td></tr>
133      <tr><td class="lineno" valign="top"></td><td class="left">     7.3.  If-Modified-Since  . . . . . . . . . . . . . . . . . . . . 13</td><td> </td><td class="right">     7.3.  If-Modified-Since  . . . . . . . . . . . . . . . . . . . . 13</td><td class="lineno" valign="top"></td></tr>
134      <tr><td class="lineno" valign="top"></td><td class="left">     7.4.  If-None-Match  . . . . . . . . . . . . . . . . . . . . . . 14</td><td> </td><td class="right">     7.4.  If-None-Match  . . . . . . . . . . . . . . . . . . . . . . 14</td><td class="lineno" valign="top"></td></tr>
135      <tr><td class="lineno" valign="top"></td><td class="left">     7.5.  If-Unmodified-Since  . . . . . . . . . . . . . . . . . . . 16</td><td> </td><td class="right">     7.5.  If-Unmodified-Since  . . . . . . . . . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
136      <tr><td class="lineno" valign="top"></td><td class="left">     7.6.  Last-Modified  . . . . . . . . . . . . . . . . . . . . . . 16</td><td> </td><td class="right">     7.6.  Last-Modified  . . . . . . . . . . . . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
137      <tr><td class="lineno" valign="top"></td><td class="left">   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 17</td><td> </td><td class="right">   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
138      <tr><td class="lineno" valign="top"></td><td class="left">     8.1.  Message Header Registration  . . . . . . . . . . . . . . . 17</td><td> </td><td class="right">     8.1.  Message Header Registration  . . . . . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
139      <tr><td><a name="diff0008" /></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="lblock">   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 1<span class="delete">7</span></td><td> </td><td class="rblock">   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 1<span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="left">   10. Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">   10. Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
142      <tr><td class="lineno" valign="top"></td><td class="left">   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="left">     11.1. Normative References . . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">     11.1. Normative References . . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="left">     11.2. Informative References . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">     11.2. Informative References . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
145      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix A.  Compatibility with Previous Versions  . . . . . . . . 18</td><td> </td><td class="right">   Appendix A.  Compatibility with Previous Versions  . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
146      <tr><td><a name="diff0009" /></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="lblock">     A.1.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . . 1<span class="delete">8</span></td><td> </td><td class="rblock">     A.1.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . . 1<span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix B.  Change Log (to be removed by RFC Editor before</td><td> </td><td class="right">   Appendix B.  Change Log (to be removed by RFC Editor before</td><td class="lineno" valign="top"></td></tr>
149      <tr><td class="lineno" valign="top"></td><td class="left">                publication)  . . . . . . . . . . . . . . . . . . . . 19</td><td> </td><td class="right">                publication)  . . . . . . . . . . . . . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="left">     B.1.  Since RFC2616  . . . . . . . . . . . . . . . . . . . . . . 19</td><td> </td><td class="right">     B.1.  Since RFC2616  . . . . . . . . . . . . . . . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="left">     B.2.  Since draft-ietf-httpbis-p4-conditional-00 . . . . . . . . 19</td><td> </td><td class="right">     B.2.  Since draft-ietf-httpbis-p4-conditional-00 . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
152      <tr><td class="lineno" valign="top"></td><td class="left">     B.3.  Since draft-ietf-httpbis-p4-conditional-01 . . . . . . . . 19</td><td> </td><td class="right">     B.3.  Since draft-ietf-httpbis-p4-conditional-01 . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
153      <tr><td class="lineno" valign="top"></td><td class="left">     B.4.  Since draft-ietf-httpbis-p4-conditional-02 . . . . . . . . 19</td><td> </td><td class="right">     B.4.  Since draft-ietf-httpbis-p4-conditional-02 . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
154      <tr><td><a name="diff0010" /></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="lblock">     B.5.  Since draft-ietf-httpbis-p4-conditional-03 . . . . . . . . <span class="delete">19</span></td><td> </td><td class="rblock">     B.5.  Since draft-ietf-httpbis-p4-conditional-03 . . . . . . . . <span class="insert">20</span></td><td class="lineno" valign="top"></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     B.6.  Since draft-ietf-httpbis-p4-conditional-04 . . . . . . . . 20</span></td><td class="lineno" valign="top"></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="left">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20</td><td> </td><td class="right">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20</td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="left">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 21</td><td> </td><td class="right">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 21</td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="left">   Intellectual Property and Copyright Statements . . . . . . . . . . 24</td><td> </td><td class="right">   Intellectual Property and Copyright Statements . . . . . . . . . . 24</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"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
168      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 4, line 47</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 4, line 47</em></th><td></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="left">   REQUIRED level and all the SHOULD level requirements for its</td><td> </td><td class="right">   REQUIRED level and all the SHOULD level requirements for its</td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="left">   protocols is said to be "unconditionally compliant"; one that</td><td> </td><td class="right">   protocols is said to be "unconditionally compliant"; one that</td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="left">   satisfies all the MUST level requirements but not all the SHOULD</td><td> </td><td class="right">   satisfies all the MUST level requirements but not all the SHOULD</td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="left">   level requirements for its protocols is said to be "conditionally</td><td> </td><td class="right">   level requirements for its protocols is said to be "conditionally</td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="left">   compliant."</td><td> </td><td class="right">   compliant."</td><td class="lineno" valign="top"></td></tr>
174      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="left">2.  Notational Conventions and Generic Grammar</td><td> </td><td class="right">2.  Notational Conventions and Generic Grammar</td><td class="lineno" valign="top"></td></tr>
176      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
177      <tr><td class="lineno" valign="top"></td><td class="left">   This specification uses the ABNF syntax defined in Section 2.1 of</td><td> </td><td class="right">   This specification uses the ABNF syntax defined in Section 2.1 of</td><td class="lineno" valign="top"></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="left">   [Part1] and the core rules defined in Section 2.2 of [Part1]:</td><td> </td><td class="right">   [Part1] and the core rules defined in Section 2.2 of [Part1]:</td><td class="lineno" valign="top"></td></tr>
179      <tr><td><a name="diff0011" /></td></tr>
180      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   [[abnf.dep: ABNF syntax and basic rules will be adopted from RFC</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   5234, see &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/36&gt;.]]</span></td><td> </td><td class="rblock"></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">     quoted-string = &lt;quoted-string, defined in [Part1], Section 2.2&gt;</td><td> </td><td class="right">     quoted-string = &lt;quoted-string, defined in [Part1], Section 2.2&gt;</td><td class="lineno" valign="top"></td></tr>
184      <tr><td><a name="diff0012" /></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     OWS           = &lt;OWS, defined in [Part1], Section 2.2&gt;</span></td><td class="lineno" valign="top"></td></tr>
186      <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>
187      <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>
188      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
189      <tr><td class="lineno" valign="top"></td><td class="left">     HTTP-date     = &lt;HTTP-date, defined in [Part1], Section 3.3.1&gt;</td><td> </td><td class="right">     HTTP-date     = &lt;HTTP-date, defined in [Part1], Section 3.3.1&gt;</td><td class="lineno" valign="top"></td></tr>
190      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
191      <tr><td class="lineno" valign="top"></td><td class="left">3.  Entity Tags</td><td> </td><td class="right">3.  Entity Tags</td><td class="lineno" valign="top"></td></tr>
192      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
193      <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>
194      <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>
195      <tr><td class="lineno" valign="top"></td><td class="left">   (Section 7.1), If-Match (Section 7.2), If-None-Match (Section 7.4),</td><td> </td><td class="right">   (Section 7.1), If-Match (Section 7.2), If-None-Match (Section 7.4),</td><td class="lineno" valign="top"></td></tr>
196      <tr><td class="lineno" valign="top"></td><td class="left">   and If-Range (Section 6.3 of [Part5]) header fields.  The definition</td><td> </td><td class="right">   and If-Range (Section 6.3 of [Part5]) header fields.  The definition</td><td class="lineno" valign="top"></td></tr>
197      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
198      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 11, line 30</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 11, line 27</em></th><td></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
200      <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>
201      <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>
202      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
203      <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>
204      <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>
205      <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>
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">7.1.  ETag</td><td> </td><td class="right">7.1.  ETag</td><td class="lineno" valign="top"></td></tr>
208      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
209      <tr><td><a name="diff0013" /></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="lblock">   The <span class="delete">ETag response-header field</span> provides the current value of the</td><td> </td><td class="rblock">   The <span class="insert">response-header field "ETag"</span> provides the current value of the</td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="lblock">   entity tag <span class="delete">for the requested variant.  The headers used with entity</span></td><td> </td><td class="rblock">   entity tag <span class="insert">(see Section 3) for the requested variant.  The headers</span></td><td class="lineno" valign="top"></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">tags are described in Sections 7.2 and 7.4 of this document, and in</span></td><td> </td><td class="rblock">   <span class="insert">used with entity tags are described in Sections 7.2 and 7.4 of this</span></td><td class="lineno" valign="top"></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">Section 6.3 of [Part5].  The entity tag MAY be used for comparison</span></td><td> </td><td class="rblock">   <span class="insert">document, and in Section 6.3 of [Part5].  The entity tag MAY be used</span></td><td class="lineno" valign="top"></td></tr>
214      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">with other entities from the same resource (see Section 5).</span></td><td> </td><td class="rblock">   <span class="insert">for comparison with other entities from the same resource (see</span></td><td class="lineno" valign="top"></td></tr>
215      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Section 5).</span></td><td class="lineno" valign="top"></td></tr>
216      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
217      <tr><td><a name="diff0014" /></td></tr>
218      <tr><td class="lineno" valign="top"></td><td class="lblock">     ETag <span class="delete">= "ETag" ":" entity-tag</span></td><td> </td><td class="rblock">     ETag <span class="insert">  = "ETag" ":" OWS ETag-v</span></td><td class="lineno" valign="top"></td></tr>
219      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     ETag-v = entity-tag</span></td><td class="lineno" valign="top"></td></tr>
220      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
221      <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>
222      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
223      <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>
224      <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>
225      <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>
226      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left">   The ETag response-header field value, an entity tag, provides for an</td><td> </td><td class="right">   The ETag response-header field value, an entity tag, provides for an</td><td class="lineno" valign="top"></td></tr>
228      <tr><td class="lineno" valign="top"></td><td class="left">   "opaque" cache validator.  This might allow more reliable validation</td><td> </td><td class="right">   "opaque" cache validator.  This might allow more reliable validation</td><td class="lineno" valign="top"></td></tr>
229      <tr><td class="lineno" valign="top"></td><td class="left">   in situations where it is inconvenient to store modification dates,</td><td> </td><td class="right">   in situations where it is inconvenient to store modification dates,</td><td class="lineno" valign="top"></td></tr>
230      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
231      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 12, line 13</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 12, line 12</em></th><td></td></tr>
232      <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>
233      <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>
234      <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>
235      <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>
236      <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>
237      <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>
238      <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>
239      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
240      <tr><td class="lineno" valign="top"></td><td class="left">7.2.  If-Match</td><td> </td><td class="right">7.2.  If-Match</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><a name="diff0015" /></td></tr>
243      <tr><td class="lineno" valign="top"></td><td class="lblock">   The <span class="delete">If-Match request-header field</span> is used with a method to make it</td><td> </td><td class="rblock">   The <span class="insert">request-header field "If-Match"</span> is used with a method to make it</td><td class="lineno" valign="top"></td></tr>
244      <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>
245      <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>
246      <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>
247      <tr><td class="lineno" valign="top"></td><td class="left">   If-Match header field.  Entity tags are defined in Section 3.  The</td><td> </td><td class="right">   If-Match header field.  Entity tags are defined in Section 3.  The</td><td class="lineno" valign="top"></td></tr>
248      <tr><td class="lineno" valign="top"></td><td class="left">   purpose of this feature is to allow efficient updates of cached</td><td> </td><td class="right">   purpose of this feature is to allow efficient updates of cached</td><td class="lineno" valign="top"></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="left">   information with a minimum amount of transaction overhead.  It is</td><td> </td><td class="right">   information with a minimum amount of transaction overhead.  It is</td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="left">   also used, on updating requests, to prevent inadvertent modification</td><td> </td><td class="right">   also used, on updating requests, to prevent inadvertent modification</td><td class="lineno" valign="top"></td></tr>
251      <tr><td class="lineno" valign="top"></td><td class="left">   of the wrong version of a resource.  As a special case, the value "*"</td><td> </td><td class="right">   of the wrong version of a resource.  As a special case, the value "*"</td><td class="lineno" valign="top"></td></tr>
252      <tr><td class="lineno" valign="top"></td><td class="left">   matches any current entity of the resource.</td><td> </td><td class="right">   matches any current entity of the resource.</td><td class="lineno" valign="top"></td></tr>
253      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
254      <tr><td><a name="diff0016" /></td></tr>
255      <tr><td class="lineno" valign="top"></td><td class="lblock">     If-Match <span class="delete">= "If-Match" ":" ( "*" | 1#entity-tag )</span></td><td> </td><td class="rblock">     If-Match <span class="insert">  = "If-Match" ":" OWS If-Match-v</span></td><td class="lineno" valign="top"></td></tr>
256      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     If-Match-v = "*" / 1#entity-tag</span></td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
258      <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>
259      <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>
260      <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>
261      <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>
262      <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>
263      <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>
264      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
265      <tr><td class="lineno" valign="top"></td><td class="left">   A server MUST use the strong comparison function (see Section 5) to</td><td> </td><td class="right">   A server MUST use the strong comparison function (see Section 5) to</td><td class="lineno" valign="top"></td></tr>
266      <tr><td class="lineno" valign="top"></td><td class="left">   compare the entity tags in If-Match.</td><td> </td><td class="right">   compare the entity tags in If-Match.</td><td class="lineno" valign="top"></td></tr>
267      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
268      <tr bgcolor="gray" ><td></td><th><a name="part-l7" /><small>skipping to change at</small><em> page 13, line 23</em></th><th> </th><th><a name="part-r7" /><small>skipping to change at</small><em> page 13, line 23</em></th><td></td></tr>
269      <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>
270      <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>
271      <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>
272      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
273      <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>
274      <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>
275      <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>
276      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
277      <tr><td class="lineno" valign="top"></td><td class="left">7.3.  If-Modified-Since</td><td> </td><td class="right">7.3.  If-Modified-Since</td><td class="lineno" valign="top"></td></tr>
278      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
279      <tr><td><a name="diff0017" /></td></tr>
280      <tr><td class="lineno" valign="top"></td><td class="lblock">   The <span class="delete">If-Modified-Since request-header field</span> is used with a method to</td><td> </td><td class="rblock">   The <span class="insert">request-header field "If-Modified-Since"</span> is used with a method to</td><td class="lineno" valign="top"></td></tr>
281      <tr><td class="lineno" valign="top"></td><td class="left">   make it conditional: if the requested variant has not been modified</td><td> </td><td class="right">   make it conditional: if the requested variant has not been modified</td><td class="lineno" valign="top"></td></tr>
282      <tr><td class="lineno" valign="top"></td><td class="left">   since the time specified in this field, an entity will not be</td><td> </td><td class="right">   since the time specified in this field, an entity will not be</td><td class="lineno" valign="top"></td></tr>
283      <tr><td class="lineno" valign="top"></td><td class="left">   returned from the server; instead, a 304 (Not Modified) response will</td><td> </td><td class="right">   returned from the server; instead, a 304 (Not Modified) response will</td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="left">   be returned without any message-body.</td><td> </td><td class="right">   be returned without any message-body.</td><td class="lineno" valign="top"></td></tr>
285      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
286      <tr><td><a name="diff0018" /></td></tr>
287      <tr><td class="lineno" valign="top"></td><td class="lblock">     If-Modified-Since <span class="delete">= "If-Modified-Since" ":" HTTP-date</span></td><td> </td><td class="rblock">     If-Modified-Since <span class="insert">  = "If-Modified-Since" ":" OWS</span></td><td class="lineno" valign="top"></td></tr>
288      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">                           If-Modified-Since-v</span></td><td class="lineno" valign="top"></td></tr>
289      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     If-Modified-Since-v = HTTP-date</span></td><td class="lineno" valign="top"></td></tr>
290      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
291      <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>
292      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
293      <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>
294      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
295      <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>
296      <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>
297      <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>
298      <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>
299      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
300      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
301      <tr bgcolor="gray" ><td></td><th><a name="part-l8" /><small>skipping to change at</small><em> page 14, line 41</em></th><th> </th><th><a name="part-r8" /><small>skipping to change at</small><em> page 14, line 43</em></th><td></td></tr>
302      <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>
303      <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>
304      <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>
305      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
306      <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>
307      <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>
308      <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>
309      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
310      <tr><td class="lineno" valign="top"></td><td class="left">7.4.  If-None-Match</td><td> </td><td class="right">7.4.  If-None-Match</td><td class="lineno" valign="top"></td></tr>
311      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
312      <tr><td><a name="diff0019" /></td></tr>
313      <tr><td class="lineno" valign="top"></td><td class="lblock">   The <span class="delete">If-None-Match request-header field is used with a method to make</span></td><td> </td><td class="rblock">   The <span class="insert">request-header field "If-None-Match" is used with a method to</span></td><td class="lineno" valign="top"></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">it conditional.  A client that has one or more entities previously</span></td><td> </td><td class="rblock">   <span class="insert">make it conditional.  A client that has one or more entities</span></td><td class="lineno" valign="top"></td></tr>
315      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">obtained from the resource can verify that none of those entities is</span></td><td> </td><td class="rblock">   <span class="insert">previously obtained from the resource can verify that none of those</span></td><td class="lineno" valign="top"></td></tr>
316      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">current by including a list of their associated entity tags in the</span></td><td> </td><td class="rblock">   <span class="insert">entities is current by including a list of their associated entity</span></td><td class="lineno" valign="top"></td></tr>
317      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">If-None-Match header field.  The purpose of this feature is to allow</span></td><td> </td><td class="rblock">   <span class="insert">tags in the If-None-Match header field.  The purpose of this feature</span></td><td class="lineno" valign="top"></td></tr>
318      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">efficient updates of cached information with a minimum amount of</span></td><td> </td><td class="rblock">   <span class="insert">is to allow efficient updates of cached information with a minimum</span></td><td class="lineno" valign="top"></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">transaction overhead.  It is also used to prevent a method (e.g.</span></td><td> </td><td class="rblock">   <span class="insert">amount of transaction overhead.  It is also used to prevent a method</span></td><td class="lineno" valign="top"></td></tr>
320      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">PUT) from inadvertently modifying an existing resource when the</span></td><td> </td><td class="rblock">   <span class="insert">(e.g.  PUT) from inadvertently modifying an existing resource when</span></td><td class="lineno" valign="top"></td></tr>
321      <tr><td class="lineno" valign="top"></td><td class="lblock">   client believes that the resource does not exist.</td><td> </td><td class="rblock">   <span class="insert">the </span>client believes that the resource does not exist.</td><td class="lineno" valign="top"></td></tr>
322      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
323      <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>
324      <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>
325      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
326      <tr><td><a name="diff0020" /></td></tr>
327      <tr><td class="lineno" valign="top"></td><td class="lblock">     If-None-Match <span class="delete">= "If-None-Match" ":" ( "*" | 1#entity-tag )</span></td><td> </td><td class="rblock">     If-None-Match <span class="insert">  = "If-None-Match" ":" OWS If-None-Match-v</span></td><td class="lineno" valign="top"></td></tr>
328      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     If-None-Match-v = "*" / 1#entity-tag</span></td><td class="lineno" valign="top"></td></tr>
329      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
330      <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>
331      <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>
332      <tr><td class="lineno" valign="top"></td><td class="left">   (without the If-None-Match header) on that resource, or if "*" is</td><td> </td><td class="right">   (without the If-None-Match header) on that resource, or if "*" is</td><td class="lineno" valign="top"></td></tr>
333      <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>
334      <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>
335      <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>
336      <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>
337      <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>
338      <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>
339      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
340      <tr bgcolor="gray" ><td></td><th><a name="part-l9" /><small>skipping to change at</small><em> page 15, line 49</em></th><th> </th><th><a name="part-r9" /><small>skipping to change at</small><em> page 16, line 4</em></th><td></td></tr>
341      <tr><td class="lineno" valign="top"></td><td class="left">   not exist.  This feature is intended to be useful in preventing races</td><td> </td><td class="right">   not exist.  This feature is intended to be useful in preventing races</td><td class="lineno" valign="top"></td></tr>
342      <tr><td class="lineno" valign="top"></td><td class="left">   between PUT operations.</td><td> </td><td class="right">   between PUT operations.</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">   Examples:</td><td> </td><td class="right">   Examples:</td><td class="lineno" valign="top"></td></tr>
345      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
346      <tr><td class="lineno" valign="top"></td><td class="left">       If-None-Match: "xyzzy"</td><td> </td><td class="right">       If-None-Match: "xyzzy"</td><td class="lineno" valign="top"></td></tr>
347      <tr><td class="lineno" valign="top"></td><td class="left">       If-None-Match: W/"xyzzy"</td><td> </td><td class="right">       If-None-Match: W/"xyzzy"</td><td class="lineno" valign="top"></td></tr>
348      <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>
349      <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>
350      <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>
351      <tr><td><a name="diff0021" /></td></tr>
352      <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>
353      <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>
354      <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>
355      <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>
356      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
357      <tr><td class="lineno" valign="top"></td><td class="left">7.5.  If-Unmodified-Since</td><td> </td><td class="right">7.5.  If-Unmodified-Since</td><td class="lineno" valign="top"></td></tr>
358      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
359      <tr><td><a name="diff0022" /></td></tr>
360      <tr><td class="lineno" valign="top"></td><td class="lblock">   The <span class="delete">If-Unmodified-Since request-header field is used with a method to</span></td><td> </td><td class="rblock">   The <span class="insert">request-header field "If-Unmodified-Since" is used with a method</span></td><td class="lineno" valign="top"></td></tr>
361      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">make it conditional.  If the requested resource has not been modified</span></td><td> </td><td class="rblock">   <span class="insert">to make it conditional.  If the requested resource has not been</span></td><td class="lineno" valign="top"></td></tr>
362      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">since the time specified in this field, the server SHOULD perform the</span></td><td> </td><td class="rblock">   <span class="insert">modified since the time specified in this field, the server SHOULD</span></td><td class="lineno" valign="top"></td></tr>
363      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">requested operation as if the If-Unmodified-Since header were not</span></td><td> </td><td class="rblock">   <span class="insert">perform the requested operation as if the If-Unmodified-Since header</span></td><td class="lineno" valign="top"></td></tr>
364      <tr><td class="lineno" valign="top"></td><td class="lblock">   present.</td><td> </td><td class="rblock">   <span class="insert">were not </span>present.</td><td class="lineno" valign="top"></td></tr>
365      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
366      <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>
367      <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>
368      <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>
369      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
370      <tr><td><a name="diff0023" /></td></tr>
371      <tr><td class="lineno" valign="top"></td><td class="lblock">     If-Unmodified-Since <span class="delete">= "If-Unmodified-Since" ":" HTTP-date</span></td><td> </td><td class="rblock">     If-Unmodified-Since <span class="insert">  = "If-Unmodified-Since" ":" OWS</span></td><td class="lineno" valign="top"></td></tr>
372      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">                             If-Unmodified-Since-v</span></td><td class="lineno" valign="top"></td></tr>
373      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     If-Unmodified-Since-v = HTTP-date</span></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 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>
376      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
377      <tr><td class="lineno" valign="top"></td><td class="left">       If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT</td><td> </td><td class="right">       If-Unmodified-Since: Sat, 29 Oct 1994 19:43:31 GMT</td><td class="lineno" valign="top"></td></tr>
378      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
379      <tr><td class="lineno" valign="top"></td><td class="left">   If the request normally (i.e., without the If-Unmodified-Since</td><td> </td><td class="right">   If the request normally (i.e., without the If-Unmodified-Since</td><td class="lineno" valign="top"></td></tr>
380      <tr><td class="lineno" valign="top"></td><td class="left">   header) would result in anything other than a 2xx or 412 status, the</td><td> </td><td class="right">   header) would result in anything other than a 2xx or 412 status, the</td><td class="lineno" valign="top"></td></tr>
381      <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>
382      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
383      <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>
384      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
385      <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>
386      <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>
387      <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>
388      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
389      <tr><td class="lineno" valign="top"></td><td class="left">7.6.  Last-Modified</td><td> </td><td class="right">7.6.  Last-Modified</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><a name="diff0024" /></td></tr>
392      <tr><td class="lineno" valign="top"></td><td class="lblock">   The <span class="delete">Last-Modified entity-header field indicates the date and time at</span></td><td> </td><td class="rblock">   The <span class="insert">entity-header field "Last-Modified" indicates the date and time</span></td><td class="lineno" valign="top"></td></tr>
393      <tr><td class="lineno" valign="top"></td><td class="lblock">   which the origin server believes the variant was last modified.</td><td> </td><td class="rblock">   <span class="insert">at </span>which the origin server believes the variant was last modified.</td><td class="lineno" valign="top"></td></tr>
394      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
395      <tr><td><a name="diff0025" /></td></tr>
396      <tr><td class="lineno" valign="top"></td><td class="lblock">     Last-Modified  <span class="delete">= "Last-Modified" ":" HTTP-date</span></td><td> </td><td class="rblock">     Last-Modified  <span class="insert"> = "Last-Modified" ":" OWS Last-Modified-v</span></td><td class="lineno" valign="top"></td></tr>
397      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     Last-Modified-v = HTTP-date</span></td><td class="lineno" valign="top"></td></tr>
398      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
399      <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>
400      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
401      <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>
402      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
403      <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>
404      <tr><td class="lineno" valign="top"></td><td class="left">   of the origin server and the nature of the original resource.  For</td><td> </td><td class="right">   of the origin server and the nature of the original resource.  For</td><td class="lineno" valign="top"></td></tr>
405      <tr><td class="lineno" valign="top"></td><td class="left">   files, it may be just the file system last-modified time.  For</td><td> </td><td class="right">   files, it may be just the file system last-modified time.  For</td><td class="lineno" valign="top"></td></tr>
406      <tr><td class="lineno" valign="top"></td><td class="left">   entities with dynamically included parts, it may be the most recent</td><td> </td><td class="right">   entities with dynamically included parts, it may be the most recent</td><td class="lineno" valign="top"></td></tr>
407      <tr><td class="lineno" valign="top"></td><td class="left">   of the set of last-modify times for its component parts.  For</td><td> </td><td class="right">   of the set of last-modify times for its component parts.  For</td><td class="lineno" valign="top"></td></tr>
408      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
409      <tr bgcolor="gray" ><td></td><th><a name="part-l10" /><small>skipping to change at</small><em> page 18, line 14</em></th><th> </th><th><a name="part-r10" /><small>skipping to change at</small><em> page 18, line 19</em></th><td></td></tr>
410      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
411      <tr><td class="lineno" valign="top"></td><td class="left">10.  Acknowledgments</td><td> </td><td class="right">10.  Acknowledgments</td><td class="lineno" valign="top"></td></tr>
412      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
413      <tr><td class="lineno" valign="top"></td><td class="left">11.  References</td><td> </td><td class="right">11.  References</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">11.1.  Normative References</td><td> </td><td class="right">11.1.  Normative References</td><td class="lineno" valign="top"></td></tr>
416      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
417      <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>
418      <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>
419      <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>
420      <tr><td><a name="diff0026" /></td></tr>
421      <tr><td class="lineno" valign="top"></td><td class="lblock">              and Message Parsing", draft-ietf-httpbis-p1-messaging-0<span class="delete">4</span></td><td> </td><td class="rblock">              and Message Parsing", draft-ietf-httpbis-p1-messaging-0<span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
422      <tr><td class="lineno" valign="top"></td><td class="lblock">              (work in progress), <span class="delete">August</span> 2008.</td><td> </td><td class="rblock">              (work in progress), <span class="insert">November</span> 2008.</td><td class="lineno" valign="top"></td></tr>
423      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
424      <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>
425      <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>
426      <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>
427      <tr><td><a name="diff0027" /></td></tr>
428      <tr><td class="lineno" valign="top"></td><td class="lblock">              Partial Responses", draft-ietf-httpbis-p5-range-0<span class="delete">4</span> (work</td><td> </td><td class="rblock">              Partial Responses", draft-ietf-httpbis-p5-range-0<span class="insert">5</span> (work</td><td class="lineno" valign="top"></td></tr>
429      <tr><td class="lineno" valign="top"></td><td class="lblock">              in progress), <span class="delete">August</span> 2008.</td><td> </td><td class="rblock">              in progress), <span class="insert">November</span> 2008.</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 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>
432      <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>
433      <tr><td class="lineno" valign="top"></td><td class="left">              and J. Reschke, Ed., "HTTP/1.1, part 6: Caching",</td><td> </td><td class="right">              and J. Reschke, Ed., "HTTP/1.1, part 6: Caching",</td><td class="lineno" valign="top"></td></tr>
434      <tr><td><a name="diff0028" /></td></tr>
435      <tr><td class="lineno" valign="top"></td><td class="lblock">              draft-ietf-httpbis-p6-cache-0<span class="delete">4</span> (work in progress),</td><td> </td><td class="rblock">              draft-ietf-httpbis-p6-cache-0<span class="insert">5</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
436      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">August</span> 2008.</td><td> </td><td class="rblock">              <span class="insert">November</span> 2008.</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">   [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>
439      <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>
440      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
441      <tr><td class="lineno" valign="top"></td><td class="left">11.2.  Informative References</td><td> </td><td class="right">11.2.  Informative References</td><td class="lineno" valign="top"></td></tr>
442      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
443      <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>
444      <tr><td class="lineno" valign="top"></td><td class="left">              Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext</td><td> </td><td class="right">              Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext</td><td class="lineno" valign="top"></td></tr>
445      <tr><td class="lineno" valign="top"></td><td class="left">              Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999.</td><td> </td><td class="right">              Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999.</td><td class="lineno" valign="top"></td></tr>
446      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
447      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
448      <tr bgcolor="gray" ><td></td><th><a name="part-l11" /><small>skipping to change at</small><em> page 19, line 15</em></th><th> </th><th><a name="part-r11" /><small>skipping to change at</small><em> page 19, line 20</em></th><td></td></tr>
449      <tr><td class="lineno" valign="top"></td><td class="left">Appendix B.  Change Log (to be removed by RFC Editor before publication)</td><td> </td><td class="right">Appendix B.  Change Log (to be removed by RFC Editor before publication)</td><td class="lineno" valign="top"></td></tr>
450      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
451      <tr><td class="lineno" valign="top"></td><td class="left">B.1.  Since RFC2616</td><td> </td><td class="right">B.1.  Since RFC2616</td><td class="lineno" valign="top"></td></tr>
452      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
453      <tr><td class="lineno" valign="top"></td><td class="left">   Extracted relevant partitions from [RFC2616].</td><td> </td><td class="right">   Extracted relevant partitions from [RFC2616].</td><td class="lineno" valign="top"></td></tr>
454      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
455      <tr><td class="lineno" valign="top"></td><td class="left">B.2.  Since draft-ietf-httpbis-p4-conditional-00</td><td> </td><td class="right">B.2.  Since draft-ietf-httpbis-p4-conditional-00</td><td class="lineno" valign="top"></td></tr>
456      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
457      <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>
458      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
459      <tr><td><a name="diff0029" /></td></tr>
460      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  &lt;http://<span class="delete">www3.tools.ietf.org/wg/httpbis/trac/ticket/35&gt;: "Normative</span></td><td> </td><td class="rblock">   o  &lt;http://<span class="insert">tools.ietf.org/wg/httpbis/trac/ticket/35&gt;: "Normative and</span></td><td class="lineno" valign="top"></td></tr>
461      <tr><td class="lineno" valign="top"></td><td class="lblock">      <span class="delete">and </span>Informative references"</td><td> </td><td class="rblock">      Informative references"</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">   Other changes:</td><td> </td><td class="right">   Other changes:</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">   o  Move definitions of 304 and 412 condition codes from Part2.</td><td> </td><td class="right">   o  Move definitions of 304 and 412 condition codes from Part2.</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">B.3.  Since draft-ietf-httpbis-p4-conditional-01</td><td> </td><td class="right">B.3.  Since draft-ietf-httpbis-p4-conditional-01</td><td class="lineno" valign="top"></td></tr>
468      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
469      <tr><td class="lineno" valign="top"></td><td class="left">   Ongoing work on ABNF conversion</td><td> </td><td class="right">   Ongoing work on ABNF conversion</td><td class="lineno" valign="top"></td></tr>
470      <tr><td><a name="diff0030" /></td></tr>
471      <tr><td class="lineno" valign="top"></td><td class="lblock">   (&lt;http://<span class="delete">www3.</span>tools.ietf.org/wg/httpbis/trac/ticket/36&gt;):</td><td> </td><td class="rblock">   (&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/36&gt;):</td><td class="lineno" valign="top"></td></tr>
472      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
473      <tr><td class="lineno" valign="top"></td><td class="left">   o  Add explicit references to BNF syntax and rules imported from</td><td> </td><td class="right">   o  Add explicit references to BNF syntax and rules imported from</td><td class="lineno" valign="top"></td></tr>
474      <tr><td class="lineno" valign="top"></td><td class="left">      other parts of the specification.</td><td> </td><td class="right">      other parts of the specification.</td><td class="lineno" valign="top"></td></tr>
475      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
476      <tr><td class="lineno" valign="top"></td><td class="left">B.4.  Since draft-ietf-httpbis-p4-conditional-02</td><td> </td><td class="right">B.4.  Since draft-ietf-httpbis-p4-conditional-02</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">   Closed issues:</td><td> </td><td class="right">   Closed issues:</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="diff0031" /></td></tr>
481      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  &lt;http://<span class="delete">www3.tools.ietf.org/wg/httpbis/trac/ticket/116&gt;: "Weak</span></td><td> </td><td class="rblock">   o  &lt;http://<span class="insert">tools.ietf.org/wg/httpbis/trac/ticket/116&gt;: "Weak ETags on</span></td><td class="lineno" valign="top"></td></tr>
482      <tr><td class="lineno" valign="top"></td><td class="lblock">      <span class="delete">ETags on </span>non-GET requests"</td><td> </td><td class="rblock">      non-GET requests"</td><td class="lineno" valign="top"></td></tr>
483      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
484      <tr><td class="lineno" valign="top"></td><td class="left">   Ongoing work on IANA Message Header Registration</td><td> </td><td class="right">   Ongoing work on IANA Message Header Registration</td><td class="lineno" valign="top"></td></tr>
485      <tr><td><a name="diff0032" /></td></tr>
486      <tr><td class="lineno" valign="top"></td><td class="lblock">   (&lt;http://<span class="delete">www3.</span>tools.ietf.org/wg/httpbis/trac/ticket/40&gt;):</td><td> </td><td class="rblock">   (&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/40&gt;):</td><td class="lineno" valign="top"></td></tr>
487      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
488      <tr><td class="lineno" valign="top"></td><td class="left">   o  Reference RFC 3984, and update header registrations for headers</td><td> </td><td class="right">   o  Reference RFC 3984, and update header registrations for headers</td><td class="lineno" valign="top"></td></tr>
489      <tr><td class="lineno" valign="top"></td><td class="left">      defined in this document.</td><td> </td><td class="right">      defined in this document.</td><td class="lineno" valign="top"></td></tr>
490      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
491      <tr><td class="lineno" valign="top"></td><td class="left">B.5.  Since draft-ietf-httpbis-p4-conditional-03</td><td> </td><td class="right">B.5.  Since draft-ietf-httpbis-p4-conditional-03</td><td class="lineno" valign="top"></td></tr>
492      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
493      <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>
494      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
495      <tr><td><a name="diff0033" /></td></tr>
496      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  &lt;http://<span class="delete">www3.tools.ietf.org/wg/httpbis/trac/ticket/71&gt;: "Examples</span></td><td> </td><td class="rblock">   o  &lt;http://<span class="insert">tools.ietf.org/wg/httpbis/trac/ticket/71&gt;: "Examples for</span></td><td class="lineno" valign="top"></td></tr>
497      <tr><td class="lineno" valign="top"></td><td class="lblock">      <span class="delete">for </span>ETag matching"</td><td> </td><td class="rblock">      ETag matching"</td><td class="lineno" valign="top"></td></tr>
498      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
499      <tr><td><a name="diff0034" /></td></tr>
500      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  &lt;http://<span class="delete">www3.</span>tools.ietf.org/wg/httpbis/trac/ticket/124&gt;: "'entity</td><td> </td><td class="rblock">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/124&gt;: "'entity</td><td class="lineno" valign="top"></td></tr>
501      <tr><td class="lineno" valign="top"></td><td class="left">      value' undefined"</td><td> </td><td class="right">      value' undefined"</td><td class="lineno" valign="top"></td></tr>
502      <tr><td><a name="diff0035" /></td></tr>
503      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">&lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/126&gt;: "bogus</span></td><td> </td><td class="rblock">   <span class="insert">                                                                      </span></td><td class="lineno" valign="top"></td></tr>
504      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">   2068 Date header reference"</span></td><td> </td><td class="rblock">   <span class="insert">&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/126&gt;: "bogus 2068</span></td><td class="lineno" valign="top"></td></tr>
505      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      Date header reference"</span></td><td class="lineno" valign="top"></td></tr>
506      <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>
507      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">B.6.  Since draft-ietf-httpbis-p4-conditional-04</span></td><td class="lineno" valign="top"></td></tr>
508      <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>
509      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Ongoing work on ABNF conversion</span></td><td class="lineno" valign="top"></td></tr>
510      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   (&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/36&gt;):</span></td><td class="lineno" valign="top"></td></tr>
511      <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>
512      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  Use "/" instead of "|" for alternatives.</span></td><td class="lineno" valign="top"></td></tr>
513      <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>
514      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  Introduce new ABNF rules for "bad" whitespace ("BWS"), optional</span></td><td class="lineno" valign="top"></td></tr>
515      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      whitespace ("OWS") and required whitespace ("RWS").</span></td><td class="lineno" valign="top"></td></tr>
516      <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>
517      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  Rewrite ABNFs to spell out whitespace rules, factor out header</span></td><td class="lineno" valign="top"></td></tr>
518      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      value format definitions.</span></td><td class="lineno" valign="top"></td></tr>
519      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
520      <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>
521      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
522      <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>
523      <tr><td class="lineno" valign="top"></td><td class="left">      304 Not Modified (status code)  5</td><td> </td><td class="right">      304 Not Modified (status code)  5</td><td class="lineno" valign="top"></td></tr>
524      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
525      <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>
526      <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>
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">   E</td><td> </td><td class="right">   E</td><td class="lineno" valign="top"></td></tr>
529      <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>
530      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
531      <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>
532      <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>
533      <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>
534      <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>
535      <tr><td><a name="diff0036" /></td></tr>
536      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         ETag-v  11</span></td><td class="lineno" valign="top"></td></tr>
537      <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>
538      <tr><td><a name="diff0037" /></td></tr>
539      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         If-Match-v  12</span></td><td class="lineno" valign="top"></td></tr>
540      <tr><td class="lineno" valign="top"></td><td class="left">         If-Modified-Since  13</td><td> </td><td class="right">         If-Modified-Since  13</td><td class="lineno" valign="top"></td></tr>
541      <tr><td><a name="diff0038" /></td></tr>
542      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         If-Modified-Since-v  13</span></td><td class="lineno" valign="top"></td></tr>
543      <tr><td class="lineno" valign="top"></td><td class="left">         If-None-Match  15</td><td> </td><td class="right">         If-None-Match  15</td><td class="lineno" valign="top"></td></tr>
544      <tr><td><a name="diff0039" /></td></tr>
545      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         If-None-Match-v  15</span></td><td class="lineno" valign="top"></td></tr>
546      <tr><td class="lineno" valign="top"></td><td class="left">         If-Unmodified-Since  16</td><td> </td><td class="right">         If-Unmodified-Since  16</td><td class="lineno" valign="top"></td></tr>
547      <tr><td><a name="diff0040" /></td></tr>
548      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         If-Unmodified-Since-v  16</span></td><td class="lineno" valign="top"></td></tr>
549      <tr><td class="lineno" valign="top"></td><td class="left">         Last-Modified  16</td><td> </td><td class="right">         Last-Modified  16</td><td class="lineno" valign="top"></td></tr>
550      <tr><td><a name="diff0041" /></td></tr>
551      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         Last-Modified-v  16</span></td><td class="lineno" valign="top"></td></tr>
552      <tr><td class="lineno" valign="top"></td><td class="left">         opaque-tag  5</td><td> </td><td class="right">         opaque-tag  5</td><td class="lineno" valign="top"></td></tr>
553      <tr><td class="lineno" valign="top"></td><td class="left">         weak  5</td><td> </td><td class="right">         weak  5</td><td class="lineno" valign="top"></td></tr>
554      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
555      <tr><td class="lineno" valign="top"></td><td class="left">   H</td><td> </td><td class="right">   H</td><td class="lineno" valign="top"></td></tr>
556      <tr><td class="lineno" valign="top"></td><td class="left">      Headers</td><td> </td><td class="right">      Headers</td><td class="lineno" valign="top"></td></tr>
557      <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>
558      <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>
559      <tr><td class="lineno" valign="top"></td><td class="left">         If-Modified-Since  13</td><td> </td><td class="right">         If-Modified-Since  13</td><td class="lineno" valign="top"></td></tr>
560      <tr><td class="lineno" valign="top"></td><td class="left">         If-None-Match  14</td><td> </td><td class="right">         If-None-Match  14</td><td class="lineno" valign="top"></td></tr>
561      <tr><td class="lineno" valign="top"></td><td class="left">         If-Unmodified-Since  16</td><td> </td><td class="right">         If-Unmodified-Since  16</td><td class="lineno" valign="top"></td></tr>
562
563     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
564     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 41 change blocks.&nbsp;</a></th></tr>
565     <tr class="stats"><td></td><th><i>59 lines changed or deleted</i></th><th><i> </i></th><th><i>88 lines changed or added</i></th><td></td></tr>
566     <tr><td colspan="5" align="center" class="small"><br/>This html diff was produced by rfcdiff 1.34. The latest version is available from <a href="http://www.tools.ietf.org/tools/rfcdiff/" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>
567   </table>
568   </body>
569   </html>
Note: See TracBrowser for help on using the repository browser.