source: draft-ietf-httpbis/diffs/draft-ietf-httpbis-p4-conditional-04-from-3.diff.html @ 325

Last change on this file since 325 was 317, checked in by julian.reschke@…, 13 years ago

prepare publication of draft -04, generate diffs between 03 and 04 (set SVN properties)
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/html; charset=iso-8859-1
File size: 76.4 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-03.txt - draft-ietf-httpbis-p4-conditional-04.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-03.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p4-conditional-04.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: <span class="delete">December 19, 2008</span>                                      J. Mogul</td><td> </td><td class="rblock">Expires: <span class="insert">March 2, 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">  June 17</span>, 2008</td><td> </td><td class="rblock">                                                         <span class="insert">August 29</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">3</span></td><td> </td><td class="rblock">                  draft-ietf-httpbis-p4-conditional-0<span class="insert">4</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 <span class="delete">December 19, 2008</span>.</td><td> </td><td class="rblock">   This Internet-Draft will expire on <span class="insert">March 2, 2009</span>.</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"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
104      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 3, line 18</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 3, line 18</em></th><td></td></tr>
105      <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>
106      <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>
107      <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>
108      <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>
109      <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>
110      <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>
111      <tr><td class="lineno" valign="top"></td><td class="left">   5.  Weak and Strong Validators . . . . . . . . . . . . . . . . . .  6</td><td> </td><td class="right">   5.  Weak and Strong Validators . . . . . . . . . . . . . . . . . .  6</td><td class="lineno" valign="top"></td></tr>
112      <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>
113      <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>
114      <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>
115      <tr><td><a name="diff0005" /></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="lblock">     7.2.  If-Match . . . . . . . . . . . . . . . . . . . . . . . . . 1<span class="delete">1</span></td><td> </td><td class="rblock">     7.2.  If-Match . . . . . . . . . . . . . . . . . . . . . . . . . 1<span class="insert">2</span></td><td class="lineno" valign="top"></td></tr>
117      <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>
118      <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>
119      <tr><td><a name="diff0006" /></td></tr>
120      <tr><td class="lineno" valign="top"></td><td class="lblock">     7.5.  If-Unmodified-Since  . . . . . . . . . . . . . . . . . . . 1<span class="delete">5</span></td><td> </td><td class="rblock">     7.5.  If-Unmodified-Since  . . . . . . . . . . . . . . . . . . . 1<span class="insert">6</span></td><td class="lineno" valign="top"></td></tr>
121      <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>
122      <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>
123      <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>
124      <tr><td class="lineno" valign="top"></td><td class="left">   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 17</td><td> </td><td class="right">   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
125      <tr><td><a name="diff0007" /></td></tr>
126      <tr><td class="lineno" valign="top"></td><td class="lblock">   10. Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 1<span class="delete">7</span></td><td> </td><td class="rblock">   10. Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 1<span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
127      <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>
128      <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>
129      <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>
130      <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>
131      <tr><td class="lineno" valign="top"></td><td class="left">     A.1.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">     A.1.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
132      <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>
133      <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>
134      <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>
135      <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>
136      <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>
137      <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>
138      <tr><td><a name="diff0008" /></td></tr>
139      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">Index  . . . . . . . . . . . . . . . . . . . . . .</span> . . . . . . . . 19</td><td> </td><td class="rblock">   <span class="insert">  B.5.  Since draft-ietf-httpbis-p4-conditional-03</span> . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">Authors' Addresses</span> . . . . . . . . . . . . . . . . . . . . . . . . 20</td><td> </td><td class="rblock">   <span class="insert">Index  . . . . . .</span> . . . . . . . . . . . . . . . . . . . . . . . . 20</td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 21</span></td><td class="lineno" valign="top"></td></tr>
142      <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>
143      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
144      <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>
145      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
146      <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>
147      <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>
148      <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>
149      <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>
150      <tr><td class="lineno" valign="top"></td><td class="left">   Conditional GET requests allow for efficient cache updates.  Other</td><td> </td><td class="right">   Conditional GET requests allow for efficient cache updates.  Other</td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="left">   conditional request methods are used to protect against overwriting</td><td> </td><td class="right">   conditional request methods are used to protect against overwriting</td><td class="lineno" valign="top"></td></tr>
152      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
153      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 6, line 5</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 6, line 5</em></th><td></td></tr>
154      <tr><td class="lineno" valign="top"></td><td class="left">4.1.  304 Not Modified</td><td> </td><td class="right">4.1.  304 Not Modified</td><td class="lineno" valign="top"></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="left">   If the client has performed a conditional GET request and access is</td><td> </td><td class="right">   If the client has performed a conditional GET request and access is</td><td class="lineno" valign="top"></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="left">   allowed, but the document has not been modified, the server SHOULD</td><td> </td><td class="right">   allowed, but the document has not been modified, the server SHOULD</td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="left">   respond with this status code.  The 304 response MUST NOT contain a</td><td> </td><td class="right">   respond with this status code.  The 304 response MUST NOT contain a</td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="left">   message-body, and thus is always terminated by the first empty line</td><td> </td><td class="right">   message-body, and thus is always terminated by the first empty line</td><td class="lineno" valign="top"></td></tr>
160      <tr><td class="lineno" valign="top"></td><td class="left">   after the header fields.</td><td> </td><td class="right">   after the header fields.</td><td class="lineno" valign="top"></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="left">   The response MUST include the following header fields:</td><td> </td><td class="right">   The response MUST include the following header fields:</td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
164      <tr><td><a name="diff0009" /></td></tr>
165      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  Date, unless its omission is required by Section 8.3.1 of [Part1]</td><td> </td><td class="rblock">   o  Date, unless its omission is required by Section 8.3.1 of [Part1]<span class="insert">.</span></td><td class="lineno" valign="top"></td></tr>
166      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
167      <tr><td class="lineno" valign="top"></td><td class="left">   If a clockless origin server obeys these rules, and proxies and</td><td> </td><td class="right">   If a clockless origin server obeys these rules, and proxies and</td><td class="lineno" valign="top"></td></tr>
168      <tr><td><a name="diff0010" /></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">clients add their own Date to any response received without one (as</span></td><td> </td><td class="rblock">   <span class="insert">   clients add their own Date to any response received without one</span></td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">already specified by [RFC2068], Section 14.19), caches will operate</span></td><td> </td><td class="rblock">   <span class="insert">   (as already specified by Section 8.3 of [Part1], caches will</span></td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="lblock">   correctly.</td><td> </td><td class="rblock">   <span class="insert">   operate </span>correctly.</td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="left">   o  ETag and/or Content-Location, if the header would have been sent</td><td> </td><td class="right">   o  ETag and/or Content-Location, if the header would have been sent</td><td class="lineno" valign="top"></td></tr>
174      <tr><td><a name="diff0011" /></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="lblock">      in a 200 response to the same request</td><td> </td><td class="rblock">      in a 200 response to the same request<span class="insert">.</span></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">   o  Expires, Cache-Control, and/or Vary, if the field-value might</td><td> </td><td class="right">   o  Expires, Cache-Control, and/or Vary, if the field-value might</td><td class="lineno" valign="top"></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="left">      differ from that sent in any previous response for the same</td><td> </td><td class="right">      differ from that sent in any previous response for the same</td><td class="lineno" valign="top"></td></tr>
179      <tr><td><a name="diff0012" /></td></tr>
180      <tr><td class="lineno" valign="top"></td><td class="lblock">      variant</td><td> </td><td class="rblock">      variant<span class="insert">.</span></td><td class="lineno" valign="top"></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
182      <tr><td class="lineno" valign="top"></td><td class="left">   If the conditional GET used a strong cache validator (see Section 5),</td><td> </td><td class="right">   If the conditional GET used a strong cache validator (see Section 5),</td><td class="lineno" valign="top"></td></tr>
183      <tr><td class="lineno" valign="top"></td><td class="left">   the response SHOULD NOT include other entity-headers.  Otherwise</td><td> </td><td class="right">   the response SHOULD NOT include other entity-headers.  Otherwise</td><td class="lineno" valign="top"></td></tr>
184      <tr><td class="lineno" valign="top"></td><td class="left">   (i.e., the conditional GET used a weak validator), the response MUST</td><td> </td><td class="right">   (i.e., the conditional GET used a weak validator), the response MUST</td><td class="lineno" valign="top"></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="left">   NOT include other entity-headers; this prevents inconsistencies</td><td> </td><td class="right">   NOT include other entity-headers; this prevents inconsistencies</td><td class="lineno" valign="top"></td></tr>
186      <tr><td class="lineno" valign="top"></td><td class="left">   between cached entity-bodies and updated headers.</td><td> </td><td class="right">   between cached entity-bodies and updated headers.</td><td class="lineno" valign="top"></td></tr>
187      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
188      <tr><td class="lineno" valign="top"></td><td class="left">   If a 304 response indicates an entity not currently cached, then the</td><td> </td><td class="right">   If a 304 response indicates an entity not currently cached, then the</td><td class="lineno" valign="top"></td></tr>
189      <tr><td class="lineno" valign="top"></td><td class="left">   cache MUST disregard the response and repeat the request without the</td><td> </td><td class="right">   cache MUST disregard the response and repeat the request without the</td><td class="lineno" valign="top"></td></tr>
190      <tr><td class="lineno" valign="top"></td><td class="left">   conditional.</td><td> </td><td class="right">   conditional.</td><td class="lineno" valign="top"></td></tr>
191      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
192      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 7, line 47</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 7, line 47</em></th><td></td></tr>
193      <tr><td class="lineno" valign="top"></td><td class="left">   range retrieval, since otherwise the client might end up with an</td><td> </td><td class="right">   range retrieval, since otherwise the client might end up with an</td><td class="lineno" valign="top"></td></tr>
194      <tr><td class="lineno" valign="top"></td><td class="left">   internally inconsistent entity.</td><td> </td><td class="right">   internally inconsistent entity.</td><td class="lineno" valign="top"></td></tr>
195      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
196      <tr><td class="lineno" valign="top"></td><td class="left">   Clients MUST NOT use weak validators in range requests ([Part5]).</td><td> </td><td class="right">   Clients MUST NOT use weak validators in range requests ([Part5]).</td><td class="lineno" valign="top"></td></tr>
197      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
198      <tr><td class="lineno" valign="top"></td><td class="left">   The only function that HTTP/1.1 defines on validators is comparison.</td><td> </td><td class="right">   The only function that HTTP/1.1 defines on validators is comparison.</td><td class="lineno" valign="top"></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="left">   There are two validator comparison functions, depending on whether</td><td> </td><td class="right">   There are two validator comparison functions, depending on whether</td><td class="lineno" valign="top"></td></tr>
200      <tr><td class="lineno" valign="top"></td><td class="left">   the comparison context allows the use of weak validators or not:</td><td> </td><td class="right">   the comparison context allows the use of weak validators or not:</td><td class="lineno" valign="top"></td></tr>
201      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
202      <tr><td class="lineno" valign="top"></td><td class="left">   o  The strong comparison function: in order to be considered equal,</td><td> </td><td class="right">   o  The strong comparison function: in order to be considered equal,</td><td class="lineno" valign="top"></td></tr>
203      <tr><td><a name="diff0013" /></td></tr>
204      <tr><td class="lineno" valign="top"></td><td class="lblock">      both <span class="delete">validators MUST be identical in every way, and both MUST NOT</span></td><td> </td><td class="rblock">      both <span class="insert">opaque-tags MUST be identical character-by-character, and</span></td><td class="lineno" valign="top"></td></tr>
205      <tr><td class="lineno" valign="top"></td><td class="lblock">      be weak.</td><td> </td><td class="rblock">      b<span class="insert">oth MUST NOT b</span>e weak.</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">   o  The weak comparison function: in order to be considered equal,</td><td> </td><td class="right">   o  The weak comparison function: in order to be considered equal,</td><td class="lineno" valign="top"></td></tr>
208      <tr><td><a name="diff0014" /></td></tr>
209      <tr><td class="lineno" valign="top"></td><td class="lblock">      both <span class="delete">validators MUST be identical in every way, but either or both</span></td><td> </td><td class="rblock">      both <span class="insert">opaque-tags MUST be identical character-by-character.</span></td><td class="lineno" valign="top"></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="lblock">      <span class="delete">of them MAY be tagged as "weak" without affecting the result.</span></td><td> </td><td class="rblock">      <span class="insert">                                                                   </span></td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The example below shows the results for a set of entity tag pairs,</span></td><td class="lineno" valign="top"></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   and both the weak and strong comparison function results:</span></td><td class="lineno" valign="top"></td></tr>
213      <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>
214      <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>
215      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | ETag 1 | ETag 2 | Strong Comparison | Weak Comparison |</span></td><td class="lineno" valign="top"></td></tr>
216      <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>
217      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | W/"1"  | W/"1"  | no match          | match           |</span></td><td class="lineno" valign="top"></td></tr>
218      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | W/"1"  | W/"2"  | no match          | no match        |</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">   | W/"1"  | "1"    | no match          | match           |</span></td><td class="lineno" valign="top"></td></tr>
220      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | "1"    | "1"    | match             | match           |</span></td><td class="lineno" valign="top"></td></tr>
221      <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>
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">   An entity tag is strong unless it is explicitly tagged as weak.</td><td> </td><td class="right">   An entity tag is strong unless it is explicitly tagged as weak.</td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno" valign="top"></td><td class="left">   Section 3 gives the syntax for entity tags.</td><td> </td><td class="right">   Section 3 gives the syntax for entity tags.</td><td class="lineno" valign="top"></td></tr>
225      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
226      <tr><td class="lineno" valign="top"></td><td class="left">   A Last-Modified time, when used as a validator in a request, is</td><td> </td><td class="right">   A Last-Modified time, when used as a validator in a request, is</td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left">   implicitly weak unless it is possible to deduce that it is strong,</td><td> </td><td class="right">   implicitly weak unless it is possible to deduce that it is strong,</td><td class="lineno" valign="top"></td></tr>
228      <tr><td class="lineno" valign="top"></td><td class="left">   using the following rules:</td><td> </td><td class="right">   using the following rules:</td><td class="lineno" valign="top"></td></tr>
229      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
230      <tr><td class="lineno" valign="top"></td><td class="left">   o  The validator is being compared by an origin server to the actual</td><td> </td><td class="right">   o  The validator is being compared by an origin server to the actual</td><td class="lineno" valign="top"></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="left">      current validator for the entity and,</td><td> </td><td class="right">      current validator for the entity and,</td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
233      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 9, line 42</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 10, line 4</em></th><td></td></tr>
234      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="left">   o  SHOULD send a Last-Modified value if it is feasible to send one,</td><td> </td><td class="right">   o  SHOULD send a Last-Modified value if it is feasible to send one,</td><td class="lineno" valign="top"></td></tr>
236      <tr><td class="lineno" valign="top"></td><td class="left">      unless the risk of a breakdown in semantic transparency that could</td><td> </td><td class="right">      unless the risk of a breakdown in semantic transparency that could</td><td class="lineno" valign="top"></td></tr>
237      <tr><td class="lineno" valign="top"></td><td class="left">      result from using this date in an If-Modified-Since header would</td><td> </td><td class="right">      result from using this date in an If-Modified-Since header would</td><td class="lineno" valign="top"></td></tr>
238      <tr><td class="lineno" valign="top"></td><td class="left">      lead to serious problems.</td><td> </td><td class="right">      lead to serious problems.</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">   In other words, the preferred behavior for an HTTP/1.1 origin server</td><td> </td><td class="right">   In other words, the preferred behavior for an HTTP/1.1 origin server</td><td class="lineno" valign="top"></td></tr>
241      <tr><td class="lineno" valign="top"></td><td class="left">   is to send both a strong entity tag and a Last-Modified value.</td><td> </td><td class="right">   is to send both a strong entity tag and a Last-Modified value.</td><td class="lineno" valign="top"></td></tr>
242      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
243      <tr><td class="lineno" valign="top"></td><td class="left">   In order to be legal, a strong entity tag MUST change whenever the</td><td> </td><td class="right">   In order to be legal, a strong entity tag MUST change whenever the</td><td class="lineno" valign="top"></td></tr>
244      <tr><td><a name="diff0015" /></td></tr>
245      <tr><td class="lineno" valign="top"></td><td class="lblock">   associated entity <span class="delete">value </span>changes in any way.  A weak entity tag SHOULD</td><td> </td><td class="rblock">   associated entity changes in any way.  A weak entity tag SHOULD</td><td class="lineno" valign="top"></td></tr>
246      <tr><td class="lineno" valign="top"></td><td class="left">   change whenever the associated entity changes in a semantically</td><td> </td><td class="right">   change whenever the associated entity changes in a semantically</td><td class="lineno" valign="top"></td></tr>
247      <tr><td class="lineno" valign="top"></td><td class="left">   significant way.</td><td> </td><td class="right">   significant way.</td><td class="lineno" valign="top"></td></tr>
248      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="left">      Note: in order to provide semantically transparent caching, an</td><td> </td><td class="right">      Note: in order to provide semantically transparent caching, an</td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="left">      origin server must avoid reusing a specific strong entity tag</td><td> </td><td class="right">      origin server must avoid reusing a specific strong entity tag</td><td class="lineno" valign="top"></td></tr>
251      <tr><td class="lineno" valign="top"></td><td class="left">      value for two different entities, or reusing a specific weak</td><td> </td><td class="right">      value for two different entities, or reusing a specific weak</td><td class="lineno" valign="top"></td></tr>
252      <tr><td class="lineno" valign="top"></td><td class="left">      entity tag value for two semantically different entities.  Cache</td><td> </td><td class="right">      entity tag value for two semantically different entities.  Cache</td><td class="lineno" valign="top"></td></tr>
253      <tr><td class="lineno" valign="top"></td><td class="left">      entries might persist for arbitrarily long periods, regardless of</td><td> </td><td class="right">      entries might persist for arbitrarily long periods, regardless of</td><td class="lineno" valign="top"></td></tr>
254      <tr><td class="lineno" valign="top"></td><td class="left">      expiration times, so it might be inappropriate to expect that a</td><td> </td><td class="right">      expiration times, so it might be inappropriate to expect that a</td><td class="lineno" valign="top"></td></tr>
255      <tr><td class="lineno" valign="top"></td><td class="left">      cache will never again attempt to validate an entry using a</td><td> </td><td class="right">      cache will never again attempt to validate an entry using a</td><td class="lineno" valign="top"></td></tr>
256      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
257      <tr bgcolor="gray" ><td></td><th><a name="part-l7" /><small>skipping to change at</small><em> page 18, line 10</em></th><th> </th><th><a name="part-r7" /><small>skipping to change at</small><em> page 18, line 14</em></th><td></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
259      <tr><td 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>
260      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
261      <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>
262      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
263      <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>
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">   [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>
266      <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>
267      <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>
268      <tr><td><a name="diff0016" /></td></tr>
269      <tr><td class="lineno" valign="top"></td><td class="lblock">              and Message Parsing", draft-ietf-httpbis-p1-messaging-0<span class="delete">3</span></td><td> </td><td class="rblock">              and Message Parsing", draft-ietf-httpbis-p1-messaging-0<span class="insert">4</span></td><td class="lineno" valign="top"></td></tr>
270      <tr><td class="lineno" valign="top"></td><td class="lblock">              (work in progress), <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              (work in progress), <span class="insert">August</span> 2008.</td><td class="lineno" valign="top"></td></tr>
271      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
272      <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>
273      <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>
274      <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>
275      <tr><td><a name="diff0017" /></td></tr>
276      <tr><td class="lineno" valign="top"></td><td class="lblock">              Partial Responses", draft-ietf-httpbis-p5-range-0<span class="delete">3</span> (work</td><td> </td><td class="rblock">              Partial Responses", draft-ietf-httpbis-p5-range-0<span class="insert">4</span> (work</td><td class="lineno" valign="top"></td></tr>
277      <tr><td class="lineno" valign="top"></td><td class="lblock">              in progress), <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              in progress), <span class="insert">August</span> 2008.</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 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>
280      <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>
281      <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>
282      <tr><td><a name="diff0018" /></td></tr>
283      <tr><td class="lineno" valign="top"></td><td class="lblock">              draft-ietf-httpbis-p6-cache-0<span class="delete">3</span> (work in progress),</td><td> </td><td class="rblock">              draft-ietf-httpbis-p6-cache-0<span class="insert">4</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              <span class="insert">August</span> 2008.</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 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>
287      <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>
288      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
289      <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>
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><a name="diff0019" /></td></tr>
292      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   [RFC2068]  Fielding, R., Gettys, J., Mogul, J., Nielsen, H., and T.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
293      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">              Berners-Lee, "Hypertext Transfer Protocol -- HTTP/1.1",</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
294      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">              RFC 2068, January 1997.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
295      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">                                                                         </span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
296      <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>
297      <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>
298      <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>
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" valign="top"></td><td class="left">   [RFC3864]  Klyne, G., Nottingham, M., and J. Mogul, "Registration</td><td> </td><td class="right">   [RFC3864]  Klyne, G., Nottingham, M., and J. Mogul, "Registration</td><td class="lineno" valign="top"></td></tr>
301      <tr><td class="lineno" valign="top"></td><td class="left">              Procedures for Message Header Fields", BCP 90, RFC 3864,</td><td> </td><td class="right">              Procedures for Message Header Fields", BCP 90, RFC 3864,</td><td class="lineno" valign="top"></td></tr>
302      <tr><td class="lineno" valign="top"></td><td class="left">              September 2004.</td><td> </td><td class="right">              September 2004.</td><td class="lineno" valign="top"></td></tr>
303      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
304      <tr><td class="lineno" valign="top"></td><td class="left">Appendix A.  Compatibility with Previous Versions</td><td> </td><td class="right">Appendix A.  Compatibility with Previous Versions</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"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
307      <tr bgcolor="gray" ><td></td><th><a name="part-l8" /><small>skipping to change at</small><em> page 19, line 43</em></th><th> </th><th><a name="part-r8" /><small>skipping to change at</small><em> page 19, line 43</em></th><td></td></tr>
308      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
309      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/116&gt;: "Weak</td><td> </td><td class="right">   o  &lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/116&gt;: "Weak</td><td class="lineno" valign="top"></td></tr>
310      <tr><td class="lineno" valign="top"></td><td class="left">      ETags on non-GET requests"</td><td> </td><td class="right">      ETags on non-GET requests"</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 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>
313      <tr><td class="lineno" valign="top"></td><td class="left">   (&lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/40&gt;):</td><td> </td><td class="right">   (&lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/40&gt;):</td><td class="lineno" valign="top"></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
315      <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>
316      <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>
317      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
318      <tr><td><a name="diff0020" /></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">B.5.  Since draft-ietf-httpbis-p4-conditional-03</span></td><td class="lineno" valign="top"></td></tr>
320      <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>
321      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Closed issues:</span></td><td class="lineno" valign="top"></td></tr>
322      <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>
323      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/71&gt;: "Examples</span></td><td class="lineno" valign="top"></td></tr>
324      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      for ETag matching"</span></td><td class="lineno" valign="top"></td></tr>
325      <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>
326      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/124&gt;: "'entity</span></td><td class="lineno" valign="top"></td></tr>
327      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      value' undefined"</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">   o  &lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/126&gt;: "bogus</span></td><td class="lineno" valign="top"></td></tr>
329      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      2068 Date header reference"</span></td><td class="lineno" valign="top"></td></tr>
330      <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>
331      <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>
332      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
333      <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>
334      <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>
335      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
336      <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>
337      <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>
338      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
339      <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>
340      <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>
341      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
342      <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>
343      <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>
344      <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>
345      <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>
346      <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>
347      <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>
348      <tr><td><a name="diff0021" /></td></tr>
349      <tr><td class="lineno" valign="top"></td><td class="lblock">         If-None-Match  1<span class="delete">4</span></td><td> </td><td class="rblock">         If-None-Match  1<span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
350      <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>
351      <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>
352      <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>
353      <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>
354      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
355      <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>
356      <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>
357      <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>
358      <tr><td><a name="diff0022" /></td></tr>
359      <tr><td class="lineno" valign="top"></td><td class="lblock">         If-Match  1<span class="delete">1</span></td><td> </td><td class="rblock">         If-Match  1<span class="insert">2</span></td><td class="lineno" valign="top"></td></tr>
360      <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>
361      <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>
362      <tr><td><a name="diff0023" /></td></tr>
363      <tr><td class="lineno" valign="top"></td><td class="lblock">         If-Unmodified-Since  1<span class="delete">5</span></td><td> </td><td class="rblock">         If-Unmodified-Since  1<span class="insert">6</span></td><td class="lineno" valign="top"></td></tr>
364      <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>
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">   I</td><td> </td><td class="right">   I</td><td class="lineno" valign="top"></td></tr>
367      <tr><td><a name="diff0024" /></td></tr>
368      <tr><td class="lineno" valign="top"></td><td class="lblock">      If-Match header  1<span class="delete">1</span></td><td> </td><td class="rblock">      If-Match header  1<span class="insert">2</span></td><td class="lineno" valign="top"></td></tr>
369      <tr><td class="lineno" valign="top"></td><td class="left">      If-Modified-Since header  13</td><td> </td><td class="right">      If-Modified-Since header  13</td><td class="lineno" valign="top"></td></tr>
370      <tr><td class="lineno" valign="top"></td><td class="left">      If-None-Match header  14</td><td> </td><td class="right">      If-None-Match header  14</td><td class="lineno" valign="top"></td></tr>
371      <tr><td><a name="diff0025" /></td></tr>
372      <tr><td class="lineno" valign="top"></td><td class="lblock">      If-Unmodified-Since header  1<span class="delete">5</span></td><td> </td><td class="rblock">      If-Unmodified-Since header  1<span class="insert">6</span></td><td class="lineno" valign="top"></td></tr>
373      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
374      <tr><td class="lineno" valign="top"></td><td class="left">   L</td><td> </td><td class="right">   L</td><td class="lineno" valign="top"></td></tr>
375      <tr><td class="lineno" valign="top"></td><td class="left">      Last-Modified header  16</td><td> </td><td class="right">      Last-Modified header  16</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">   S</td><td> </td><td class="right">   S</td><td class="lineno" valign="top"></td></tr>
378      <tr><td class="lineno" valign="top"></td><td class="left">      Status Codes</td><td> </td><td class="right">      Status Codes</td><td class="lineno" valign="top"></td></tr>
379      <tr><td class="lineno" valign="top"></td><td class="left">         304 Not Modified  5</td><td> </td><td class="right">         304 Not Modified  5</td><td class="lineno" valign="top"></td></tr>
380      <tr><td class="lineno" valign="top"></td><td class="left">         412 Precondition Failed  6</td><td> </td><td class="right">         412 Precondition Failed  6</td><td class="lineno" valign="top"></td></tr>
381      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
382      <tr><td class="lineno" valign="top"></td><td class="left">Authors' Addresses</td><td> </td><td class="right">Authors' Addresses</td><td class="lineno" valign="top"></td></tr>
383
384     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
385     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 25 change blocks.&nbsp;</a></th></tr>
386     <tr class="stats"><td></td><th><i>35 lines changed or deleted</i></th><th><i> </i></th><th><i>55 lines changed or added</i></th><td></td></tr>
387     <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>
388   </table>
389   </body>
390   </html>
Note: See TracBrowser for help on using the repository browser.