source: draft-ietf-httpbis/diffs/draft-ietf-httpbis-p6-cache-18-from-17.diff.html @ 1499

Last change on this file since 1499 was 1499, checked in by julian.reschke@…, 8 years ago

prepare for publication of -18 on Jan 04.

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36<body > 
37  <table border="0" cellpadding="0" cellspacing="0"> 
38  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p6-cache-17.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p6-cache-18.txt&nbsp;</th><th></th></tr> 
39      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
40      <tr><td class="lineno" valign="top"></td><td class="left">HTTPbis Working Group                                   R. Fielding, Ed.</td><td> </td><td class="right">HTTPbis Working Group                                   R. Fielding, Ed.</td><td class="lineno" valign="top"></td></tr>
41      <tr><td class="lineno" valign="top"></td><td class="left">Internet-Draft                                                     Adobe</td><td> </td><td class="right">Internet-Draft                                                     Adobe</td><td class="lineno" valign="top"></td></tr>
42      <tr><td class="lineno" valign="top"></td><td class="left">Obsoletes: 2616 (if approved)                                  J. Gettys</td><td> </td><td class="right">Obsoletes: 2616 (if approved)                                  J. Gettys</td><td class="lineno" valign="top"></td></tr>
43      <tr><td class="lineno" valign="top"></td><td class="left">Intended status: Standards Track                          Alcatel-Lucent</td><td> </td><td class="right">Intended status: Standards Track                          Alcatel-Lucent</td><td class="lineno" valign="top"></td></tr>
44      <tr><td><a name="diff0001" /></td></tr>
45      <tr><td class="lineno" valign="top"></td><td class="lblock">Expires: <span class="delete">May 3, 2012 </span>                                           J. Mogul</td><td> </td><td class="rblock">Expires: <span class="insert">July 7, 2012</span>                                           J. Mogul</td><td class="lineno" valign="top"></td></tr>
46      <tr><td class="lineno" valign="top"></td><td class="left">                                                                      HP</td><td> </td><td class="right">                                                                      HP</td><td class="lineno" valign="top"></td></tr>
47      <tr><td class="lineno" valign="top"></td><td class="left">                                                              H. Frystyk</td><td> </td><td class="right">                                                              H. Frystyk</td><td class="lineno" valign="top"></td></tr>
48      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
49      <tr><td class="lineno" valign="top"></td><td class="left">                                                             L. Masinter</td><td> </td><td class="right">                                                             L. Masinter</td><td class="lineno" valign="top"></td></tr>
50      <tr><td class="lineno" valign="top"></td><td class="left">                                                                   Adobe</td><td> </td><td class="right">                                                                   Adobe</td><td class="lineno" valign="top"></td></tr>
51      <tr><td class="lineno" valign="top"></td><td class="left">                                                                P. Leach</td><td> </td><td class="right">                                                                P. Leach</td><td class="lineno" valign="top"></td></tr>
52      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
53      <tr><td class="lineno" valign="top"></td><td class="left">                                                          T. Berners-Lee</td><td> </td><td class="right">                                                          T. Berners-Lee</td><td class="lineno" valign="top"></td></tr>
54      <tr><td class="lineno" valign="top"></td><td class="left">                                                                 W3C/MIT</td><td> </td><td class="right">                                                                 W3C/MIT</td><td class="lineno" valign="top"></td></tr>
55      <tr><td class="lineno" valign="top"></td><td class="left">                                                           Y. Lafon, Ed.</td><td> </td><td class="right">                                                           Y. Lafon, Ed.</td><td class="lineno" valign="top"></td></tr>
56      <tr><td class="lineno" valign="top"></td><td class="left">                                                                     W3C</td><td> </td><td class="right">                                                                     W3C</td><td class="lineno" valign="top"></td></tr>
57      <tr><td class="lineno" valign="top"></td><td class="left">                                                      M. Nottingham, Ed.</td><td> </td><td class="right">                                                      M. Nottingham, Ed.</td><td class="lineno" valign="top"></td></tr>
58      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Rackspace</td><td> </td><td class="right">                                                               Rackspace</td><td class="lineno" valign="top"></td></tr>
59      <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>
60      <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>
61      <tr><td><a name="diff0002" /></td></tr>
62      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                        <span class="delete">October 31, 2011</span></td><td> </td><td class="rblock">                                                        <span class="insert"> January 4, 2012</span></td><td class="lineno" valign="top"></td></tr>
63      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="left">                       HTTP/1.1, part 6: Caching</td><td> </td><td class="right">                       HTTP/1.1, part 6: Caching</td><td class="lineno" valign="top"></td></tr>
65      <tr><td><a name="diff0003" /></td></tr>
66      <tr><td class="lineno" valign="top"></td><td class="lblock">                     draft-ietf-httpbis-p6-cache-1<span class="delete">7</span></td><td> </td><td class="rblock">                     draft-ietf-httpbis-p6-cache-1<span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
67      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
68      <tr><td class="lineno" valign="top"></td><td class="left">Abstract</td><td> </td><td class="right">Abstract</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">   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>
71      <tr><td class="lineno" valign="top"></td><td class="left">   protocol for distributed, collaborative, hypertext information</td><td> </td><td class="right">   protocol for distributed, collaborative, hypertext information</td><td class="lineno" valign="top"></td></tr>
72      <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>
73      <tr><td class="lineno" valign="top"></td><td class="left">   information initiative since 1990.  This document is Part 6 of the</td><td> </td><td class="right">   information initiative since 1990.  This document is Part 6 of the</td><td class="lineno" valign="top"></td></tr>
74      <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>
75      <tr><td class="lineno" valign="top"></td><td class="left">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.</td><td> </td><td class="right">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.</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"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
78      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 2, line 6</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 2, line 6</em></th><td></td></tr>
79      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
80      <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>
81      <tr><td class="lineno" valign="top"></td><td class="left">   group mailing list (ietf-http-wg@w3.org), which is archived at</td><td> </td><td class="right">   group mailing list (ietf-http-wg@w3.org), which is archived at</td><td class="lineno" valign="top"></td></tr>
82      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://lists.w3.org/Archives/Public/ietf-http-wg/&gt;.</td><td> </td><td class="right">   &lt;http://lists.w3.org/Archives/Public/ietf-http-wg/&gt;.</td><td class="lineno" valign="top"></td></tr>
83      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
84      <tr><td class="lineno" valign="top"></td><td class="left">   The current issues list is at</td><td> </td><td class="right">   The current issues list is at</td><td class="lineno" valign="top"></td></tr>
85      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://tools.ietf.org/wg/httpbis/trac/report/3&gt; and related</td><td> </td><td class="right">   &lt;http://tools.ietf.org/wg/httpbis/trac/report/3&gt; and related</td><td class="lineno" valign="top"></td></tr>
86      <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>
87      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td> </td><td class="right">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td class="lineno" valign="top"></td></tr>
88      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
89      <tr><td><a name="diff0004" /></td></tr>
90      <tr><td class="lineno" valign="top"></td><td class="lblock">   The changes in this draft are summarized in Appendix C.1<span class="delete">8</span>.</td><td> </td><td class="rblock">   The changes in this draft are summarized in Appendix C.1<span class="insert">9</span>.</td><td class="lineno" valign="top"></td></tr>
91      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
92      <tr><td class="lineno" valign="top"></td><td class="left">Status of This Memo</td><td> </td><td class="right">Status of This Memo</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">   This Internet-Draft is submitted in full conformance with the</td><td> </td><td class="right">   This Internet-Draft is submitted in full conformance with the</td><td class="lineno" valign="top"></td></tr>
95      <tr><td class="lineno" valign="top"></td><td class="left">   provisions of BCP 78 and BCP 79.</td><td> </td><td class="right">   provisions of BCP 78 and BCP 79.</td><td class="lineno" valign="top"></td></tr>
96      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
97      <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>
98      <tr><td class="lineno" valign="top"></td><td class="left">   Task Force (IETF).  Note that other groups may also distribute</td><td> </td><td class="right">   Task Force (IETF).  Note that other groups may also distribute</td><td class="lineno" valign="top"></td></tr>
99      <tr><td class="lineno" valign="top"></td><td class="left">   working documents as Internet-Drafts.  The list of current Internet-</td><td> </td><td class="right">   working documents as Internet-Drafts.  The list of current Internet-</td><td class="lineno" valign="top"></td></tr>
100      <tr><td class="lineno" valign="top"></td><td class="left">   Drafts is at http://datatracker.ietf.org/drafts/current/.</td><td> </td><td class="right">   Drafts is at http://datatracker.ietf.org/drafts/current/.</td><td class="lineno" valign="top"></td></tr>
101      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
102      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are draft documents valid for a maximum of six months</td><td> </td><td class="right">   Internet-Drafts are draft documents valid for a maximum of six months</td><td class="lineno" valign="top"></td></tr>
103      <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>
104      <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>
105      <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>
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><a name="diff0005" /></td></tr>
108      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on <span class="delete">May 3</span>, 2012.</td><td> </td><td class="rblock">   This Internet-Draft will expire on <span class="insert">July 7</span>, 2012.</td><td class="lineno" valign="top"></td></tr>
109      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
110      <tr><td class="lineno" valign="top"></td><td class="left">Copyright Notice</td><td> </td><td class="right">Copyright Notice</td><td class="lineno" valign="top"></td></tr>
111      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></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">   Copyright (c) 201<span class="delete">1</span> IETF Trust and the persons identified as the</td><td> </td><td class="rblock">   Copyright (c) 201<span class="insert">2</span> IETF Trust and the persons identified as the</td><td class="lineno" valign="top"></td></tr>
114      <tr><td class="lineno" valign="top"></td><td class="left">   document authors.  All rights reserved.</td><td> </td><td class="right">   document authors.  All rights reserved.</td><td class="lineno" valign="top"></td></tr>
115      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="left">   This document is subject to BCP 78 and the IETF Trust's Legal</td><td> </td><td class="right">   This document is subject to BCP 78 and the IETF Trust's Legal</td><td class="lineno" valign="top"></td></tr>
117      <tr><td class="lineno" valign="top"></td><td class="left">   Provisions Relating to IETF Documents</td><td> </td><td class="right">   Provisions Relating to IETF Documents</td><td class="lineno" valign="top"></td></tr>
118      <tr><td class="lineno" valign="top"></td><td class="left">   (http://trustee.ietf.org/license-info) in effect on the date of</td><td> </td><td class="right">   (http://trustee.ietf.org/license-info) in effect on the date of</td><td class="lineno" valign="top"></td></tr>
119      <tr><td class="lineno" valign="top"></td><td class="left">   publication of this document.  Please review these documents</td><td> </td><td class="right">   publication of this document.  Please review these documents</td><td class="lineno" valign="top"></td></tr>
120      <tr><td class="lineno" valign="top"></td><td class="left">   carefully, as they describe your rights and restrictions with respect</td><td> </td><td class="right">   carefully, as they describe your rights and restrictions with respect</td><td class="lineno" valign="top"></td></tr>
121      <tr><td class="lineno" valign="top"></td><td class="left">   to this document.  Code Components extracted from this document must</td><td> </td><td class="right">   to this document.  Code Components extracted from this document must</td><td class="lineno" valign="top"></td></tr>
122      <tr><td class="lineno" valign="top"></td><td class="left">   include Simplified BSD License text as described in Section 4.e of</td><td> </td><td class="right">   include Simplified BSD License text as described in Section 4.e of</td><td class="lineno" valign="top"></td></tr>
123      <tr><td class="lineno" valign="top"></td><td class="left">   the Trust Legal Provisions and are provided without warranty as</td><td> </td><td class="right">   the Trust Legal Provisions and are provided without warranty as</td><td class="lineno" valign="top"></td></tr>
124      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
125      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 3, line 19</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 3, line 19</em></th><td></td></tr>
126      <tr><td class="lineno" valign="top"></td><td class="left">     1.2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">     1.2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
127      <tr><td class="lineno" valign="top"></td><td class="left">     1.3.  Conformance and Error Handling . . . . . . . . . . . . . .  7</td><td> </td><td class="right">     1.3.  Conformance and Error Handling . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
128      <tr><td class="lineno" valign="top"></td><td class="left">     1.4.  Syntax Notation  . . . . . . . . . . . . . . . . . . . . .  7</td><td> </td><td class="right">     1.4.  Syntax Notation  . . . . . . . . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
129      <tr><td class="lineno" valign="top"></td><td class="left">       1.4.1.  Core Rules . . . . . . . . . . . . . . . . . . . . . .  8</td><td> </td><td class="right">       1.4.1.  Core Rules . . . . . . . . . . . . . . . . . . . . . .  8</td><td class="lineno" valign="top"></td></tr>
130      <tr><td class="lineno" valign="top"></td><td class="left">       1.4.2.  ABNF Rules defined in other Parts of the</td><td> </td><td class="right">       1.4.2.  ABNF Rules defined in other Parts of the</td><td class="lineno" valign="top"></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="left">               Specification  . . . . . . . . . . . . . . . . . . . .  8</td><td> </td><td class="right">               Specification  . . . . . . . . . . . . . . . . . . . .  8</td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="left">     1.5.  Delta Seconds  . . . . . . . . . . . . . . . . . . . . . .  8</td><td> </td><td class="right">     1.5.  Delta Seconds  . . . . . . . . . . . . . . . . . . . . . .  8</td><td class="lineno" valign="top"></td></tr>
133      <tr><td class="lineno" valign="top"></td><td class="left">   2.  Cache Operation  . . . . . . . . . . . . . . . . . . . . . . .  8</td><td> </td><td class="right">   2.  Cache Operation  . . . . . . . . . . . . . . . . . . . . . . .  8</td><td class="lineno" valign="top"></td></tr>
134      <tr><td class="lineno" valign="top"></td><td class="left">     2.1.  Response Cacheability  . . . . . . . . . . . . . . . . . .  9</td><td> </td><td class="right">     2.1.  Response Cacheability  . . . . . . . . . . . . . . . . . .  9</td><td class="lineno" valign="top"></td></tr>
135      <tr><td class="lineno" valign="top"></td><td class="left">     2.2.  Constructing Responses from Caches . . . . . . . . . . . . 10</td><td> </td><td class="right">     2.2.  Constructing Responses from Caches . . . . . . . . . . . . 10</td><td class="lineno" valign="top"></td></tr>
136      <tr><td><a name="diff0007" /></td></tr>
137      <tr><td class="lineno" valign="top"></td><td class="lblock">     2.3.  Freshness Model  . . . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock">     2.3.  Freshness Model  . . . . . . . . . . . . . . . . . . . . . <span class="insert">12</span></td><td class="lineno" valign="top"></td></tr>
138      <tr><td class="lineno" valign="top"></td><td class="lblock">       2.3.1.  Calculating Freshness Lifetime . . . . . . . . . . . . <span class="delete">12</span></td><td> </td><td class="rblock">       2.3.1.  Calculating Freshness Lifetime . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
139      <tr><td class="lineno" valign="top"></td><td class="lblock">       2.3.2.  Calculating Age  . . . . . . . . . . . . . . . . . . . <span class="delete">13</span></td><td> </td><td class="rblock">       2.3.2.  Calculating Age  . . . . . . . . . . . . . . . . . . . <span class="insert">14</span></td><td class="lineno" valign="top"></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="lblock">       2.3.3.  Serving Stale Responses  . . . . . . . . . . . . . . . <span class="delete">15</span></td><td> </td><td class="rblock">       2.3.3.  Serving Stale Responses  . . . . . . . . . . . . . . . <span class="insert">16</span></td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="left">     2.4.  Validation Model . . . . . . . . . . . . . . . . . . . . . 16</td><td> </td><td class="right">     2.4.  Validation Model . . . . . . . . . . . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
142      <tr><td class="lineno" valign="top"></td><td class="left">       2.4.1.  Freshening Responses . . . . . . . . . . . . . . . . . 17</td><td> </td><td class="right">       2.4.1.  Freshening Responses . . . . . . . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="left">     2.5.  Request Methods that Invalidate  . . . . . . . . . . . . . 18</td><td> </td><td class="right">     2.5.  Request Methods that Invalidate  . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="left">     2.6.  Shared Caching of Authenticated Responses  . . . . . . . . 18</td><td> </td><td class="right">     2.6.  Shared Caching of Authenticated Responses  . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
145      <tr><td class="lineno" valign="top"></td><td class="left">     2.7.  Caching Negotiated Responses . . . . . . . . . . . . . . . 19</td><td> </td><td class="right">     2.7.  Caching Negotiated Responses . . . . . . . . . . . . . . . 19</td><td class="lineno" valign="top"></td></tr>
146      <tr><td class="lineno" valign="top"></td><td class="left">     2.8.  Combining Partial Content  . . . . . . . . . . . . . . . . 20</td><td> </td><td class="right">     2.8.  Combining Partial Content  . . . . . . . . . . . . . . . . 20</td><td class="lineno" valign="top"></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="left">   3.  Header Field Definitions . . . . . . . . . . . . . . . . . . . 20</td><td> </td><td class="right">   3.  Header Field Definitions . . . . . . . . . . . . . . . . . . . 20</td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno" valign="top"></td><td class="left">     3.1.  Age  . . . . . . . . . . . . . . . . . . . . . . . . . . . 20</td><td> </td><td class="right">     3.1.  Age  . . . . . . . . . . . . . . . . . . . . . . . . . . . 20</td><td class="lineno" valign="top"></td></tr>
149      <tr><td class="lineno" valign="top"></td><td class="left">     3.2.  Cache-Control  . . . . . . . . . . . . . . . . . . . . . . 21</td><td> </td><td class="right">     3.2.  Cache-Control  . . . . . . . . . . . . . . . . . . . . . . 21</td><td class="lineno" valign="top"></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="left">       3.2.1.  Request Cache-Control Directives . . . . . . . . . . . 21</td><td> </td><td class="right">       3.2.1.  Request Cache-Control Directives . . . . . . . . . . . 21</td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="left">       3.2.2.  Response Cache-Control Directives  . . . . . . . . . . 23</td><td> </td><td class="right">       3.2.2.  Response Cache-Control Directives  . . . . . . . . . . 23</td><td class="lineno" valign="top"></td></tr>
152      <tr><td class="lineno" valign="top"></td><td class="left">       3.2.3.  Cache Control Extensions . . . . . . . . . . . . . . . 26</td><td> </td><td class="right">       3.2.3.  Cache Control Extensions . . . . . . . . . . . . . . . 26</td><td class="lineno" valign="top"></td></tr>
153      <tr><td class="lineno" valign="top"></td><td class="left">     3.3.  Expires  . . . . . . . . . . . . . . . . . . . . . . . . . 27</td><td> </td><td class="right">     3.3.  Expires  . . . . . . . . . . . . . . . . . . . . . . . . . 27</td><td class="lineno" valign="top"></td></tr>
154      <tr><td class="lineno" valign="top"></td><td class="left">     3.4.  Pragma . . . . . . . . . . . . . . . . . . . . . . . . . . 28</td><td> </td><td class="right">     3.4.  Pragma . . . . . . . . . . . . . . . . . . . . . . . . . . 28</td><td class="lineno" valign="top"></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="left">     3.5.  Vary . . . . . . . . . . . . . . . . . . . . . . . . . . . 28</td><td> </td><td class="right">     3.5.  Vary . . . . . . . . . . . . . . . . . . . . . . . . . . . 28</td><td class="lineno" valign="top"></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="left">     3.6.  Warning  . . . . . . . . . . . . . . . . . . . . . . . . . 29</td><td> </td><td class="right">     3.6.  Warning  . . . . . . . . . . . . . . . . . . . . . . . . . 29</td><td class="lineno" valign="top"></td></tr>
157      <tr><td><a name="diff0008" /></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">4.  History Lists</span>  . . . . . . . . . . . . . . . . . . . . . . . . 32</td><td> </td><td class="rblock">       <span class="insert">3.6.1.  110 Response is Stale  . . . . . . . . . . . . . . . . 31</span></td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">5.  IANA Considerations</span>  . . . . . . . . . . . . . . . . . . . . . 32</td><td> </td><td class="rblock"><span class="insert">       3.6.2.  111 Revalidation Failed  . . . . . . . . . . . . . . . 31</span></td><td class="lineno" valign="top"></td></tr>
160      <tr><td class="lineno" valign="top"></td><td class="lblock">     <span class="delete">5.1.</span>  Cache Directive Registry . . . . . . . . . . . . . . . . . <span class="delete">32</span></td><td> </td><td class="rblock"><span class="insert">       3.6.3.  112 Disconnected Operation . . . . . . . . . . . . . . 31</span></td><td class="lineno" valign="top"></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     5.2.</span>  Header Field Registration  . . . . . . . . . . . . . . . . 33</td><td> </td><td class="rblock"><span class="insert">       3.6.4.  113 Heuristic Expiration . . . . . . . . . . . . . . . 31</span></td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">6.</span>  Security Considerations  . . . . . . . . . . . . . . . . . . . <span class="delete">33</span></td><td> </td><td class="rblock"><span class="insert">       3.6.5.  199 Miscellaneous Warning  . . . . . . . . . . . . . . 31</span></td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   7.</span>  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">33</span></td><td> </td><td class="rblock"><span class="insert">       3.6.6.  214 Transformation Applied</span> . . . . . . . . . . . . . . <span class="insert">31</span></td><td class="lineno" valign="top"></td></tr>
164      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   8.</span>  References . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">33</span></td><td> </td><td class="rblock"><span class="insert">       3.6.7.  299 Miscellaneous Persistent Warning . . . . . . . . . 31</span></td><td class="lineno" valign="top"></td></tr>
165      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     8.1.</span>  Normative References . . . . . . . . . . . . . . . . . . . <span class="delete">33</span></td><td> </td><td class="rblock"><span class="insert">       3.6.8.  Warn Code Extensions . . . . . . .</span> . . . . . . . . . . 32</td><td class="lineno" valign="top"></td></tr>
166      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     8.2.</span>  Informative References . . . . . . . . . . . . . . . . . . <span class="delete">34</span></td><td> </td><td class="rblock">     <span class="insert">3.7.  History Lists  .</span> . . . . . . . . . . . . . . . . . . . . . 32</td><td class="lineno" valign="top"></td></tr>
167      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">     <span class="insert">3.8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . 32</span></td><td class="lineno" valign="top"></td></tr>
168      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">       3.8.1.</span>  Cache Directive Registry . . . . . . . . . . . . . . . <span class="insert">32</span></td><td class="lineno" valign="top"></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">       3.8.2.  Warn Code Registry</span> . . <span class="insert">. . . . . . . . . . . . . . . . 33</span></td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     3.9.</span>  Header Field Registration  . . . . . . . . . . . . . . . . 33</td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">4.</span>  Security Considerations  . . . . . . . . . . . . . . . . . . . <span class="insert">34</span></td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   5.</span>  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">34</span></td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   6.</span>  References . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">34</span></td><td class="lineno" valign="top"></td></tr>
174      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     6.1.</span>  Normative References . . . . . . . . . . . . . . . . . . . <span class="insert">34</span></td><td class="lineno" valign="top"></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     6.2.</span>  Informative References . . . . . . . . . . . . . . . . . . <span class="insert">35</span></td><td class="lineno" valign="top"></td></tr>
176      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix A.  Changes from RFC 2616 . . . . . . . . . . . . . . . . 35</td><td> </td><td class="right">   Appendix A.  Changes from RFC 2616 . . . . . . . . . . . . . . . . 35</td><td class="lineno" valign="top"></td></tr>
177      <tr><td><a name="diff0009" /></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="lblock">   Appendix B.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 3<span class="delete">5</span></td><td> </td><td class="rblock">   Appendix B.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 3<span class="insert">6</span></td><td class="lineno" valign="top"></td></tr>
179      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix C.  Change Log (to be removed by RFC Editor before</td><td> </td><td class="right">   Appendix C.  Change Log (to be removed by RFC Editor before</td><td class="lineno" valign="top"></td></tr>
180      <tr><td><a name="diff0010" /></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="lblock">                publication)  . . . . . . . . . . . . . . . . . . . . <span class="delete">36</span></td><td> </td><td class="rblock">                publication)  . . . . . . . . . . . . . . . . . . . . <span class="insert">37</span></td><td class="lineno" valign="top"></td></tr>
182      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.1.  Since RFC 2616 . . . . . . . . . . . . . . . . . . . . . . <span class="delete">36</span></td><td> </td><td class="rblock">     C.1.  Since RFC 2616 . . . . . . . . . . . . . . . . . . . . . . <span class="insert">37</span></td><td class="lineno" valign="top"></td></tr>
183      <tr><td class="lineno" valign="top"></td><td class="left">     C.2.  Since draft-ietf-httpbis-p6-cache-00 . . . . . . . . . . . 37</td><td> </td><td class="right">     C.2.  Since draft-ietf-httpbis-p6-cache-00 . . . . . . . . . . . 37</td><td class="lineno" valign="top"></td></tr>
184      <tr><td><a name="diff0011" /></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.3.  Since draft-ietf-httpbis-p6-cache-01 . . . . . . . . . . . 3<span class="delete">7</span></td><td> </td><td class="rblock">     C.3.  Since draft-ietf-httpbis-p6-cache-01 . . . . . . . . . . . 3<span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
186      <tr><td class="lineno" valign="top"></td><td class="left">     C.4.  Since draft-ietf-httpbis-p6-cache-02 . . . . . . . . . . . 38</td><td> </td><td class="right">     C.4.  Since draft-ietf-httpbis-p6-cache-02 . . . . . . . . . . . 38</td><td class="lineno" valign="top"></td></tr>
187      <tr><td><a name="diff0012" /></td></tr>
188      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.5.  Since draft-ietf-httpbis-p6-cache-03 . . . . . . . . . . . <span class="delete">38</span></td><td> </td><td class="rblock">     C.5.  Since draft-ietf-httpbis-p6-cache-03 . . . . . . . . . . . <span class="insert">39</span></td><td class="lineno" valign="top"></td></tr>
189      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.6.  Since draft-ietf-httpbis-p6-cache-04 . . . . . . . . . . . <span class="delete">38</span></td><td> </td><td class="rblock">     C.6.  Since draft-ietf-httpbis-p6-cache-04 . . . . . . . . . . . <span class="insert">39</span></td><td class="lineno" valign="top"></td></tr>
190      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.7.  Since draft-ietf-httpbis-p6-cache-05 . . . . . . . . . . . <span class="delete">38</span></td><td> </td><td class="rblock">     C.7.  Since draft-ietf-httpbis-p6-cache-05 . . . . . . . . . . . <span class="insert">39</span></td><td class="lineno" valign="top"></td></tr>
191      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.8.  Since draft-ietf-httpbis-p6-cache-06 . . . . . . . . . . . <span class="delete">39</span></td><td> </td><td class="rblock">     C.8.  Since draft-ietf-httpbis-p6-cache-06 . . . . . . . . . . . <span class="insert">40</span></td><td class="lineno" valign="top"></td></tr>
192      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.9.  Since draft-ietf-httpbis-p6-cache-07 . . . . . . . . . . . <span class="delete">39</span></td><td> </td><td class="rblock">     C.9.  Since draft-ietf-httpbis-p6-cache-07 . . . . . . . . . . . <span class="insert">40</span></td><td class="lineno" valign="top"></td></tr>
193      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.10. Since draft-ietf-httpbis-p6-cache-08 . . . . . . . . . . . <span class="delete">39</span></td><td> </td><td class="rblock">     C.10. Since draft-ietf-httpbis-p6-cache-08 . . . . . . . . . . . <span class="insert">40</span></td><td class="lineno" valign="top"></td></tr>
194      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.11. Since draft-ietf-httpbis-p6-cache-09 . . . . . . . . . . . <span class="delete">40</span></td><td> </td><td class="rblock">     C.11. Since draft-ietf-httpbis-p6-cache-09 . . . . . . . . . . . <span class="insert">41</span></td><td class="lineno" valign="top"></td></tr>
195      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.12. Since draft-ietf-httpbis-p6-cache-10 . . . . . . . . . . . <span class="delete">40</span></td><td> </td><td class="rblock">     C.12. Since draft-ietf-httpbis-p6-cache-10 . . . . . . . . . . . <span class="insert">41</span></td><td class="lineno" valign="top"></td></tr>
196      <tr><td class="lineno" valign="top"></td><td class="left">     C.13. Since draft-ietf-httpbis-p6-cache-11 . . . . . . . . . . . 41</td><td> </td><td class="right">     C.13. Since draft-ietf-httpbis-p6-cache-11 . . . . . . . . . . . 41</td><td class="lineno" valign="top"></td></tr>
197      <tr><td><a name="diff0013" /></td></tr>
198      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.14. Since draft-ietf-httpbis-p6-cache-12 . . . . . . . . . . . <span class="delete">41</span></td><td> </td><td class="rblock">     C.14. Since draft-ietf-httpbis-p6-cache-12 . . . . . . . . . . . <span class="insert">42</span></td><td class="lineno" valign="top"></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.15. Since draft-ietf-httpbis-p6-cache-13 . . . . . . . . . . . <span class="delete">41</span></td><td> </td><td class="rblock">     C.15. Since draft-ietf-httpbis-p6-cache-13 . . . . . . . . . . . <span class="insert">42</span></td><td class="lineno" valign="top"></td></tr>
200      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.16. Since draft-ietf-httpbis-p6-cache-14 . . . . . . . . . . . <span class="delete">41</span></td><td> </td><td class="rblock">     C.16. Since draft-ietf-httpbis-p6-cache-14 . . . . . . . . . . . <span class="insert">42</span></td><td class="lineno" valign="top"></td></tr>
201      <tr><td class="lineno" valign="top"></td><td class="left">     C.17. Since draft-ietf-httpbis-p6-cache-15 . . . . . . . . . . . 42</td><td> </td><td class="right">     C.17. Since draft-ietf-httpbis-p6-cache-15 . . . . . . . . . . . 42</td><td class="lineno" valign="top"></td></tr>
202      <tr><td><a name="diff0014" /></td></tr>
203      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.18. Since draft-ietf-httpbis-p6-cache-16 . . . . . . . . . . . <span class="delete">42</span></td><td> </td><td class="rblock">     C.18. Since draft-ietf-httpbis-p6-cache-16 . . . . . . . . . . . <span class="insert">43</span></td><td class="lineno" valign="top"></td></tr>
204      <tr><td class="lineno" valign="top"></td><td class="lblock">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">42</span></td><td> </td><td class="rblock"><span class="insert">     C.19. Since draft-ietf-httpbis-p6-cache-17 . . . . . . . . . . . 43</span></td><td class="lineno" valign="top"></td></tr>
205      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">43</span></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">1.  Introduction</td><td> </td><td class="right">1.  Introduction</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 class="lineno" valign="top"></td><td class="left">   HTTP is typically used for distributed information systems, where</td><td> </td><td class="right">   HTTP is typically used for distributed information systems, where</td><td class="lineno" valign="top"></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="left">   performance can be improved by the use of response caches.  This</td><td> </td><td class="right">   performance can be improved by the use of response caches.  This</td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="left">   document defines aspects of HTTP/1.1 related to caching and reusing</td><td> </td><td class="right">   document defines aspects of HTTP/1.1 related to caching and reusing</td><td class="lineno" valign="top"></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="left">   response messages.</td><td> </td><td class="right">   response messages.</td><td class="lineno" valign="top"></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
214      <tr><td class="lineno" valign="top"></td><td class="left">1.1.  Purpose</td><td> </td><td class="right">1.1.  Purpose</td><td class="lineno" valign="top"></td></tr>
215      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
216      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
217      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 11, line 11</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 11, line 11</em></th><td></td></tr>
218      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
219      <tr><td class="lineno" valign="top"></td><td class="left">   o  The presented effective request URI (Section 4.3 of [Part1]) and</td><td> </td><td class="right">   o  The presented effective request URI (Section 4.3 of [Part1]) and</td><td class="lineno" valign="top"></td></tr>
220      <tr><td class="lineno" valign="top"></td><td class="left">      that of the stored response match, and</td><td> </td><td class="right">      that of the stored response match, and</td><td class="lineno" valign="top"></td></tr>
221      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
222      <tr><td class="lineno" valign="top"></td><td class="left">   o  the request method associated with the stored response allows it</td><td> </td><td class="right">   o  the request method associated with the stored response allows it</td><td class="lineno" valign="top"></td></tr>
223      <tr><td class="lineno" valign="top"></td><td class="left">      to be used for the presented request, and</td><td> </td><td class="right">      to be used for the presented request, and</td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
225      <tr><td class="lineno" valign="top"></td><td class="left">   o  selecting header fields nominated by the stored response (if any)</td><td> </td><td class="right">   o  selecting header fields nominated by the stored response (if any)</td><td class="lineno" valign="top"></td></tr>
226      <tr><td class="lineno" valign="top"></td><td class="left">      match those presented (see Section 2.7), and</td><td> </td><td class="right">      match those presented (see Section 2.7), and</td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
228      <tr><td><a name="diff0015" /></td></tr>
229      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  the presented request <span class="delete">and</span> stored response <span class="delete">are free from directives</span></td><td> </td><td class="rblock">   o  the presented request <span class="insert">does not contain the no-cache pragma</span></td><td class="lineno" valign="top"></td></tr>
230      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      that would prevent its use (see Section 3.2</span> and <span class="delete">Section 3.4),</span> and</td><td> </td><td class="rblock"><span class="insert">      (Section 3.4), nor the no-cache cache directive (Section 3.2.1),</span></td><td class="lineno" valign="top"></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      unless the</span> stored response <span class="insert">is successfully validated</span></td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      (Section 2.4),</span> and</td><td class="lineno" valign="top"></td></tr>
233      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
234      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">o  the stored response does not contain the no-cache cache directive</span></td><td class="lineno" valign="top"></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      (Section 3.2.2), unless it is successfully validated</span></td><td class="lineno" valign="top"></td></tr>
236      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      (Section 2.4),</span> and</td><td class="lineno" valign="top"></td></tr>
237      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
238      <tr><td class="lineno" valign="top"></td><td class="left">   o  the stored response is either:</td><td> </td><td class="right">   o  the stored response is either:</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">      *  fresh (see Section 2.3), or</td><td> </td><td class="right">      *  fresh (see Section 2.3), or</td><td class="lineno" valign="top"></td></tr>
241      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
242      <tr><td class="lineno" valign="top"></td><td class="left">      *  allowed to be served stale (see Section 2.3.3), or</td><td> </td><td class="right">      *  allowed to be served stale (see Section 2.3.3), or</td><td class="lineno" valign="top"></td></tr>
243      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
244      <tr><td class="lineno" valign="top"></td><td class="left">      *  successfully validated (see Section 2.4).</td><td> </td><td class="right">      *  successfully validated (see Section 2.4).</td><td class="lineno" valign="top"></td></tr>
245      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
246      <tr><td class="lineno" valign="top"></td><td class="left">   Note that any of the requirements listed above can be overridden by a</td><td> </td><td class="right">   Note that any of the requirements listed above can be overridden by a</td><td class="lineno" valign="top"></td></tr>
247      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
248      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 12, line 34</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 12, line 40</em></th><td></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="left">   expiration time.  This specification does not provide specific</td><td> </td><td class="right">   expiration time.  This specification does not provide specific</td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="left">   algorithms, but does impose worst-case constraints on their results.</td><td> </td><td class="right">   algorithms, but does impose worst-case constraints on their results.</td><td class="lineno" valign="top"></td></tr>
251      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
252      <tr><td class="lineno" valign="top"></td><td class="left">   The calculation to determine if a response is fresh is:</td><td> </td><td class="right">   The calculation to determine if a response is fresh is:</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 class="lineno" valign="top"></td><td class="left">      response_is_fresh = (freshness_lifetime &gt; current_age)</td><td> </td><td class="right">      response_is_fresh = (freshness_lifetime &gt; current_age)</td><td class="lineno" valign="top"></td></tr>
255      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
256      <tr><td class="lineno" valign="top"></td><td class="left">   The freshness_lifetime is defined in Section 2.3.1; the current_age</td><td> </td><td class="right">   The freshness_lifetime is defined in Section 2.3.1; the current_age</td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="left">   is defined in Section 2.3.2.</td><td> </td><td class="right">   is defined in Section 2.3.2.</td><td class="lineno" valign="top"></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
259      <tr><td><a name="diff0016" /></td></tr>
260      <tr><td class="lineno" valign="top"></td><td class="lblock">   Additionally, clients <span class="delete">might need to</span> influence freshness <span class="delete">calculation.</span></td><td> </td><td class="rblock">   Additionally, clients <span class="insert">can</span> influence freshness <span class="insert">calculation -- either</span></td><td class="lineno" valign="top"></td></tr>
261      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   They can do this</span> using <span class="delete">several</span> request cache <span class="delete">directives, with the</span></td><td> </td><td class="rblock"><span class="insert">   constraining it relaxing it -- by</span> using <span class="insert">the max-age and min-fresh</span></td><td class="lineno" valign="top"></td></tr>
262      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   effect of either increasing or loosening constraints on freshness.</span></td><td> </td><td class="rblock">   request cache <span class="insert">directives.</span>  See Section <span class="insert">3.2.1 for details.</span></td><td class="lineno" valign="top"></td></tr>
263      <tr><td class="lineno" valign="top"></td><td class="lblock">   See Section <span class="delete">3.2.1.</span></td><td> </td><td class="rblock"></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">   Note that freshness applies only to cache operation; it cannot be</td><td> </td><td class="right">   Note that freshness applies only to cache operation; it cannot be</td><td class="lineno" valign="top"></td></tr>
266      <tr><td class="lineno" valign="top"></td><td class="left">   used to force a user agent to refresh its display or reload a</td><td> </td><td class="right">   used to force a user agent to refresh its display or reload a</td><td class="lineno" valign="top"></td></tr>
267      <tr><td><a name="diff0017" /></td></tr>
268      <tr><td class="lineno" valign="top"></td><td class="lblock">   resource.  See Section <span class="delete">4</span> for an explanation of the difference between</td><td> </td><td class="rblock">   resource.  See Section <span class="insert">3.7</span> for an explanation of the difference</td><td class="lineno" valign="top"></td></tr>
269      <tr><td class="lineno" valign="top"></td><td class="lblock">   caches and history mechanisms.</td><td> </td><td class="rblock">   between caches and history mechanisms.</td><td class="lineno" valign="top"></td></tr>
270      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
271      <tr><td class="lineno" valign="top"></td><td class="left">2.3.1.  Calculating Freshness Lifetime</td><td> </td><td class="right">2.3.1.  Calculating Freshness Lifetime</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">   A cache can calculate the freshness lifetime (denoted as</td><td> </td><td class="right">   A cache can calculate the freshness lifetime (denoted as</td><td class="lineno" valign="top"></td></tr>
274      <tr><td class="lineno" valign="top"></td><td class="left">   freshness_lifetime) of a response by using the first match of:</td><td> </td><td class="right">   freshness_lifetime) of a response by using the first match of:</td><td class="lineno" valign="top"></td></tr>
275      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
276      <tr><td class="lineno" valign="top"></td><td class="left">   o  If the cache is shared and the s-maxage response cache directive</td><td> </td><td class="right">   o  If the cache is shared and the s-maxage response cache directive</td><td class="lineno" valign="top"></td></tr>
277      <tr><td class="lineno" valign="top"></td><td class="left">      (Section 3.2.2) is present, use its value, or</td><td> </td><td class="right">      (Section 3.2.2) is present, use its value, or</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">   o  If the max-age response cache directive (Section 3.2.2) is</td><td> </td><td class="right">   o  If the max-age response cache directive (Section 3.2.2) is</td><td class="lineno" valign="top"></td></tr>
280      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
281      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 15, line 10</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 15, line 20</em></th><td></td></tr>
282      <tr><td class="lineno" valign="top"></td><td class="left">   2.  the "corrected_age_value", if all of the caches along the</td><td> </td><td class="right">   2.  the "corrected_age_value", if all of the caches along the</td><td class="lineno" valign="top"></td></tr>
283      <tr><td class="lineno" valign="top"></td><td class="left">       response path implement HTTP/1.1.  A cache MUST interpret this</td><td> </td><td class="right">       response path implement HTTP/1.1.  A cache MUST interpret this</td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="left">       value relative to the time the request was initiated, not the</td><td> </td><td class="right">       value relative to the time the request was initiated, not the</td><td class="lineno" valign="top"></td></tr>
285      <tr><td class="lineno" valign="top"></td><td class="left">       time that the response was received.</td><td> </td><td class="right">       time that the response was received.</td><td class="lineno" valign="top"></td></tr>
286      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
287      <tr><td class="lineno" valign="top"></td><td class="left">     apparent_age = max(0, response_time - date_value);</td><td> </td><td class="right">     apparent_age = max(0, response_time - date_value);</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">     response_delay = response_time - request_time;</td><td> </td><td class="right">     response_delay = response_time - request_time;</td><td class="lineno" valign="top"></td></tr>
290      <tr><td class="lineno" valign="top"></td><td class="left">     corrected_age_value = age_value + response_delay;</td><td> </td><td class="right">     corrected_age_value = age_value + response_delay;</td><td class="lineno" valign="top"></td></tr>
291      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
292      <tr><td><a name="diff0018" /></td></tr>
293      <tr><td class="lineno" valign="top"></td><td class="lblock">   These <span class="delete">ar</span>e combined as</td><td> </td><td class="rblock">   These <span class="insert">SHOULD b</span>e combined as</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">     corrected_initial_age = max(apparent_age, corrected_age_value);</td><td> </td><td class="right">     corrected_initial_age = max(apparent_age, corrected_age_value);</td><td class="lineno" valign="top"></td></tr>
296      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
297      <tr><td><a name="diff0019" /></td></tr>
298      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">unless the cache is confident in the value of the Age header (e.g.,</span></td><td class="lineno" valign="top"></td></tr>
299      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   because there are no HTTP/1.0 hops in the Via header), in which case</span></td><td class="lineno" valign="top"></td></tr>
300      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   the corrected_age_value MAY be used as the corrected_initial_age.</span></td><td class="lineno" valign="top"></td></tr>
301      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
302      <tr><td class="lineno" valign="top"></td><td class="left">   The current_age of a stored response can then be calculated by adding</td><td> </td><td class="right">   The current_age of a stored response can then be calculated by adding</td><td class="lineno" valign="top"></td></tr>
303      <tr><td class="lineno" valign="top"></td><td class="left">   the amount of time (in seconds) since the stored response was last</td><td> </td><td class="right">   the amount of time (in seconds) since the stored response was last</td><td class="lineno" valign="top"></td></tr>
304      <tr><td class="lineno" valign="top"></td><td class="left">   validated by the origin server to the corrected_initial_age.</td><td> </td><td class="right">   validated by the origin server to the corrected_initial_age.</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">     resident_time = now - response_time;</td><td> </td><td class="right">     resident_time = now - response_time;</td><td class="lineno" valign="top"></td></tr>
307      <tr><td class="lineno" valign="top"></td><td class="left">     current_age = corrected_initial_age + resident_time;</td><td> </td><td class="right">     current_age = corrected_initial_age + resident_time;</td><td class="lineno" valign="top"></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">   Additionally, to avoid common problems in date parsing:</td><td> </td><td class="right">   Additionally, to avoid common problems in date parsing:</td><td class="lineno" valign="top"></td></tr>
310      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
311      <tr><td class="lineno" valign="top"></td><td class="left">   o  HTTP/1.1 clients and caches SHOULD assume that an RFC-850 date</td><td> </td><td class="right">   o  HTTP/1.1 clients and caches SHOULD assume that an RFC-850 date</td><td class="lineno" valign="top"></td></tr>
312      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
313      <tr bgcolor="gray" ><td></td><th><a name="part-l7" /><small>skipping to change at</small><em> page 31, line 12</em></th><th> </th><th><a name="part-r7" /><small>skipping to change at</small><em> page 31, line 12</em></th><td></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="left">   warn-date, and that warn-date is different from the Date value in the</td><td> </td><td class="right">   warn-date, and that warn-date is different from the Date value in the</td><td class="lineno" valign="top"></td></tr>
315      <tr><td class="lineno" valign="top"></td><td class="left">   response, then that warning-value MUST be deleted from the message</td><td> </td><td class="right">   response, then that warning-value MUST be deleted from the message</td><td class="lineno" valign="top"></td></tr>
316      <tr><td class="lineno" valign="top"></td><td class="left">   before storing, forwarding, or using it. (preventing the consequences</td><td> </td><td class="right">   before storing, forwarding, or using it. (preventing the consequences</td><td class="lineno" valign="top"></td></tr>
317      <tr><td class="lineno" valign="top"></td><td class="left">   of naive caching of Warning header fields.)  If all of the warning-</td><td> </td><td class="right">   of naive caching of Warning header fields.)  If all of the warning-</td><td class="lineno" valign="top"></td></tr>
318      <tr><td class="lineno" valign="top"></td><td class="left">   values are deleted for this reason, the Warning header field MUST be</td><td> </td><td class="right">   values are deleted for this reason, the Warning header field MUST be</td><td class="lineno" valign="top"></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="left">   deleted as well.</td><td> </td><td class="right">   deleted as well.</td><td class="lineno" valign="top"></td></tr>
320      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
321      <tr><td class="lineno" valign="top"></td><td class="left">   The following warn-codes are defined by this specification, each with</td><td> </td><td class="right">   The following warn-codes are defined by this specification, each with</td><td class="lineno" valign="top"></td></tr>
322      <tr><td class="lineno" valign="top"></td><td class="left">   a recommended warn-text in English, and a description of its meaning.</td><td> </td><td class="right">   a recommended warn-text in English, and a description of its meaning.</td><td class="lineno" valign="top"></td></tr>
323      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
324      <tr><td><a name="diff0020" /></td></tr>
325      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   110 Response is s</span>tale</td><td> </td><td class="rblock"><span class="insert">3.6.1.  110 Response is S</span>tale</td><td class="lineno" valign="top"></td></tr>
326      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
327      <tr><td><a name="diff0021" /></td></tr>
328      <tr><td class="lineno" valign="top"></td><td class="lblock">      A cache SHOULD include this whenever the returned response is</td><td> </td><td class="rblock">   A cache SHOULD include this whenever the returned response is stale.</td><td class="lineno" valign="top"></td></tr>
329      <tr><td class="lineno" valign="top"></td><td class="lblock">      stale.</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
330      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
331      <tr><td><a name="diff0022" /></td></tr>
332      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   111 Revalidation f</span>ailed</td><td> </td><td class="rblock"><span class="insert">3.6.2.  111 Revalidation F</span>ailed</td><td class="lineno" valign="top"></td></tr>
333      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
334      <tr><td><a name="diff0023" /></td></tr>
335      <tr><td class="lineno" valign="top"></td><td class="lblock">      A cache SHOULD include this when returning a stale response</td><td> </td><td class="rblock">   A cache SHOULD include this when returning a stale response because</td><td class="lineno" valign="top"></td></tr>
336      <tr><td class="lineno" valign="top"></td><td class="lblock">      because an attempt to validate the response failed, due to an</td><td> </td><td class="rblock">   an attempt to validate the response failed, due to an inability to</td><td class="lineno" valign="top"></td></tr>
337      <tr><td class="lineno" valign="top"></td><td class="lblock">      inability to reach the server.</td><td> </td><td class="rblock">   reach the server.</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><a name="diff0024" /></td></tr>
340      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   112 Disconnected o</span>peration</td><td> </td><td class="rblock"><span class="insert">3.6.3.  112 Disconnected O</span>peration</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><a name="diff0025" /></td></tr>
343      <tr><td class="lineno" valign="top"></td><td class="lblock">      A cache SHOULD include this if it is intentionally disconnected</td><td> </td><td class="rblock">   A cache SHOULD include this if it is intentionally disconnected from</td><td class="lineno" valign="top"></td></tr>
344      <tr><td class="lineno" valign="top"></td><td class="lblock">      from the rest of the network for a period of time.</td><td> </td><td class="rblock">   the rest of the network for a period of time.</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><a name="diff0026" /></td></tr>
347      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   113 Heuristic e</span>xpiration</td><td> </td><td class="rblock"><span class="insert">3.6.4.  113 Heuristic E</span>xpiration</td><td class="lineno" valign="top"></td></tr>
348      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
349      <tr><td><a name="diff0027" /></td></tr>
350      <tr><td class="lineno" valign="top"></td><td class="lblock">      A cache SHOULD include this if it heuristically chose a freshness</td><td> </td><td class="rblock">   A cache SHOULD include this if it heuristically chose a freshness</td><td class="lineno" valign="top"></td></tr>
351      <tr><td class="lineno" valign="top"></td><td class="lblock">      lifetime greater than 24 hours and the response's age is greater</td><td> </td><td class="rblock">   lifetime greater than 24 hours and the response's age is greater than</td><td class="lineno" valign="top"></td></tr>
352      <tr><td class="lineno" valign="top"></td><td class="lblock">      than 24 hours.</td><td> </td><td class="rblock">   24 hours.</td><td class="lineno" valign="top"></td></tr>
353      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
354      <tr><td><a name="diff0028" /></td></tr>
355      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   199 Miscellaneous w</span>arning</td><td> </td><td class="rblock"><span class="insert">3.6.5.  199 Miscellaneous W</span>arning</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><a name="diff0029" /></td></tr>
358      <tr><td class="lineno" valign="top"></td><td class="lblock">      The warning text can include arbitrary information to be presented</td><td> </td><td class="rblock">   The warning text can include arbitrary information to be presented to</td><td class="lineno" valign="top"></td></tr>
359      <tr><td class="lineno" valign="top"></td><td class="lblock">      to a human user, or logged.  A system receiving this warning MUST</td><td> </td><td class="rblock">   a human user, or logged.  A system receiving this warning MUST NOT</td><td class="lineno" valign="top"></td></tr>
360      <tr><td class="lineno" valign="top"></td><td class="lblock">      NOT take any automated action, besides presenting the warning to</td><td> </td><td class="rblock">   take any automated action, besides presenting the warning to the</td><td class="lineno" valign="top"></td></tr>
361      <tr><td class="lineno" valign="top"></td><td class="lblock">      the user.</td><td> </td><td class="rblock">   user.</td><td class="lineno" valign="top"></td></tr>
362      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
363      <tr><td><a name="diff0030" /></td></tr>
364      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   214 Transformation a</span>pplied</td><td> </td><td class="rblock"><span class="insert">3.6.6.  214 Transformation A</span>pplied</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><a name="diff0031" /></td></tr>
367      <tr><td class="lineno" valign="top"></td><td class="lblock">      MUST be added by a proxy if it applies any transformation to the</td><td> </td><td class="rblock">   MUST be added by a proxy if it applies any transformation to the</td><td class="lineno" valign="top"></td></tr>
368      <tr><td class="lineno" valign="top"></td><td class="lblock">      representation, such as changing the content-coding, media-type,</td><td> </td><td class="rblock">   representation, such as changing the content-coding, media-type, or</td><td class="lineno" valign="top"></td></tr>
369      <tr><td class="lineno" valign="top"></td><td class="lblock">      or modifying the representation data, unless this Warning code</td><td> </td><td class="rblock">   modifying the representation data, unless this Warning code already</td><td class="lineno" valign="top"></td></tr>
370      <tr><td class="lineno" valign="top"></td><td class="lblock">      already appears in the response.</td><td> </td><td class="rblock">   appears in the response.</td><td class="lineno" valign="top"></td></tr>
371      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
372      <tr><td><a name="diff0032" /></td></tr>
373      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   299 Miscellaneous persistent w</span>arning</td><td> </td><td class="rblock"><span class="insert">3.6.7.  299 Miscellaneous Persistent W</span>arning</td><td class="lineno" valign="top"></td></tr>
374      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
375      <tr><td><a name="diff0033" /></td></tr>
376      <tr><td class="lineno" valign="top"></td><td class="lblock">      The warning text can include arbitrary information to be presented</td><td> </td><td class="rblock">   The warning text can include arbitrary information to be presented to</td><td class="lineno" valign="top"></td></tr>
377      <tr><td class="lineno" valign="top"></td><td class="lblock">      to a human user, or logged.  A system receiving this warning MUST</td><td> </td><td class="rblock">   a human user, or logged.  A system receiving this warning MUST NOT</td><td class="lineno" valign="top"></td></tr>
378      <tr><td class="lineno" valign="top"></td><td class="lblock">      NOT take any automated action.</td><td> </td><td class="rblock">   take any automated action.</td><td class="lineno" valign="top"></td></tr>
379      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
380      <tr><td><a name="diff0034" /></td></tr>
381      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">4.</span>  History Lists</td><td> </td><td class="rblock"><span class="insert">3.6.8.  Warn Code Extensions</span></td><td class="lineno" valign="top"></td></tr>
382      <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>
383      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The HTTP Warn Code Registry defines the name space for warn codes.</span></td><td class="lineno" valign="top"></td></tr>
384      <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>
385      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   A registration MUST include the following fields:</span></td><td class="lineno" valign="top"></td></tr>
386      <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>
387      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  Warn Code (3 digits)</span></td><td class="lineno" valign="top"></td></tr>
388      <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>
389      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  Short Description</span></td><td class="lineno" valign="top"></td></tr>
390      <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>
391      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  Pointer to specification text</span></td><td class="lineno" valign="top"></td></tr>
392      <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>
393      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Values to be added to this name space are subject to IETF review</span></td><td class="lineno" valign="top"></td></tr>
394      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   ([RFC5226], Section 4.1).</span></td><td class="lineno" valign="top"></td></tr>
395      <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>
396      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The registry itself is maintained at</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">   &lt;http://www.iana.org/assignments/http-warn-codes&gt;.</span></td><td class="lineno" valign="top"></td></tr>
398      <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>
399      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">3.7.</span>  History Lists</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">   User agents often have history mechanisms, such as "Back" buttons and</td><td> </td><td class="right">   User agents often have history mechanisms, such as "Back" buttons and</td><td class="lineno" valign="top"></td></tr>
402      <tr><td class="lineno" valign="top"></td><td class="left">   history lists, that can be used to redisplay a representation</td><td> </td><td class="right">   history lists, that can be used to redisplay a representation</td><td class="lineno" valign="top"></td></tr>
403      <tr><td class="lineno" valign="top"></td><td class="left">   retrieved earlier in a session.</td><td> </td><td class="right">   retrieved earlier in a session.</td><td class="lineno" valign="top"></td></tr>
404      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
405      <tr><td class="lineno" valign="top"></td><td class="left">   The freshness model (Section 2.3) does not necessarily apply to</td><td> </td><td class="right">   The freshness model (Section 2.3) does not necessarily apply to</td><td class="lineno" valign="top"></td></tr>
406      <tr><td class="lineno" valign="top"></td><td class="left">   history mechanisms.  I.e., a history mechanism can display a previous</td><td> </td><td class="right">   history mechanisms.  I.e., a history mechanism can display a previous</td><td class="lineno" valign="top"></td></tr>
407      <tr><td class="lineno" valign="top"></td><td class="left">   representation even if it has expired.</td><td> </td><td class="right">   representation even if it has expired.</td><td class="lineno" valign="top"></td></tr>
408      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
409      <tr><td class="lineno" valign="top"></td><td class="left">   This does not prohibit the history mechanism from telling the user</td><td> </td><td class="right">   This does not prohibit the history mechanism from telling the user</td><td class="lineno" valign="top"></td></tr>
410      <tr><td class="lineno" valign="top"></td><td class="left">   that a view might be stale, or from honoring cache directives (e.g.,</td><td> </td><td class="right">   that a view might be stale, or from honoring cache directives (e.g.,</td><td class="lineno" valign="top"></td></tr>
411      <tr><td class="lineno" valign="top"></td><td class="left">   Cache-Control: no-store).</td><td> </td><td class="right">   Cache-Control: no-store).</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><a name="diff0035" /></td></tr>
414      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">5</span>.  IANA Considerations</td><td> </td><td class="rblock"><span class="insert">3.8</span>.  IANA Considerations</td><td class="lineno" valign="top"></td></tr>
415      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
416      <tr><td><a name="diff0036" /></td></tr>
417      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">5</span>.1.  Cache Directive Registry</td><td> </td><td class="rblock"><span class="insert">3.8</span>.1.  Cache Directive Registry</td><td class="lineno" valign="top"></td></tr>
418      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
419      <tr><td class="lineno" valign="top"></td><td class="left">   The registration procedure for HTTP Cache Directives is defined by</td><td> </td><td class="right">   The registration procedure for HTTP Cache Directives is defined by</td><td class="lineno" valign="top"></td></tr>
420      <tr><td class="lineno" valign="top"></td><td class="left">   Section 3.2.3 of this document.</td><td> </td><td class="right">   Section 3.2.3 of this document.</td><td class="lineno" valign="top"></td></tr>
421      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
422      <tr><td class="lineno" valign="top"></td><td class="left">   The HTTP Cache Directive Registry shall be created at</td><td> </td><td class="right">   The HTTP Cache Directive Registry shall be created at</td><td class="lineno" valign="top"></td></tr>
423      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://www.iana.org/assignments/http-cache-directives&gt; and be</td><td> </td><td class="right">   &lt;http://www.iana.org/assignments/http-cache-directives&gt; and be</td><td class="lineno" valign="top"></td></tr>
424      <tr><td class="lineno" valign="top"></td><td class="left">   populated with the registrations below:</td><td> </td><td class="right">   populated with the registrations below:</td><td class="lineno" valign="top"></td></tr>
425      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
426      <tr><td class="lineno" valign="top"></td><td class="left">   +------------------------+------------------------------+</td><td> </td><td class="right">   +------------------------+------------------------------+</td><td class="lineno" valign="top"></td></tr>
427      <tr><td class="lineno" valign="top"></td><td class="left">   | Cache Directive        | Reference                    |</td><td> </td><td class="right">   | Cache Directive        | Reference                    |</td><td class="lineno" valign="top"></td></tr>
428      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
429      <tr bgcolor="gray" ><td></td><th><a name="part-l8" /><small>skipping to change at</small><em> page 33, line 5</em></th><th> </th><th><a name="part-r8" /><small>skipping to change at</small><em> page 33, line 24</em></th><td></td></tr>
430      <tr><td class="lineno" valign="top"></td><td class="left">   | no-transform           | Section 3.2.1, Section 3.2.2 |</td><td> </td><td class="right">   | no-transform           | Section 3.2.1, Section 3.2.2 |</td><td class="lineno" valign="top"></td></tr>
431      <tr><td class="lineno" valign="top"></td><td class="left">   | only-if-cached         | Section 3.2.1                |</td><td> </td><td class="right">   | only-if-cached         | Section 3.2.1                |</td><td class="lineno" valign="top"></td></tr>
432      <tr><td class="lineno" valign="top"></td><td class="left">   | private                | Section 3.2.2                |</td><td> </td><td class="right">   | private                | Section 3.2.2                |</td><td class="lineno" valign="top"></td></tr>
433      <tr><td class="lineno" valign="top"></td><td class="left">   | proxy-revalidate       | Section 3.2.2                |</td><td> </td><td class="right">   | proxy-revalidate       | Section 3.2.2                |</td><td class="lineno" valign="top"></td></tr>
434      <tr><td class="lineno" valign="top"></td><td class="left">   | public                 | Section 3.2.2                |</td><td> </td><td class="right">   | public                 | Section 3.2.2                |</td><td class="lineno" valign="top"></td></tr>
435      <tr><td class="lineno" valign="top"></td><td class="left">   | s-maxage               | Section 3.2.2                |</td><td> </td><td class="right">   | s-maxage               | Section 3.2.2                |</td><td class="lineno" valign="top"></td></tr>
436      <tr><td class="lineno" valign="top"></td><td class="left">   | stale-if-error         | [RFC5861], Section 4         |</td><td> </td><td class="right">   | stale-if-error         | [RFC5861], Section 4         |</td><td class="lineno" valign="top"></td></tr>
437      <tr><td class="lineno" valign="top"></td><td class="left">   | stale-while-revalidate | [RFC5861], Section 3         |</td><td> </td><td class="right">   | stale-while-revalidate | [RFC5861], Section 3         |</td><td class="lineno" valign="top"></td></tr>
438      <tr><td class="lineno" valign="top"></td><td class="left">   +------------------------+------------------------------+</td><td> </td><td class="right">   +------------------------+------------------------------+</td><td class="lineno" valign="top"></td></tr>
439      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
440      <tr><td><a name="diff0037" /></td></tr>
441      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">5.2.</span>  Header Field Registration</td><td> </td><td class="rblock"><span class="insert">3.8.2.  Warn Code Registry</span></td><td class="lineno" valign="top"></td></tr>
442      <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>
443      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The registration procedure for HTTP Warn Codes is defined by</span></td><td class="lineno" valign="top"></td></tr>
444      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Section 3.6.8 of this document.</span></td><td class="lineno" valign="top"></td></tr>
445      <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>
446      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The HTTP Warn Code Registry shall be created at</span></td><td class="lineno" valign="top"></td></tr>
447      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   &lt;http://www.iana.org/assignments/http-cache-directives&gt; and be</span></td><td class="lineno" valign="top"></td></tr>
448      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   populated with the registrations below:</span></td><td class="lineno" valign="top"></td></tr>
449      <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>
450      <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>
451      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | Warn Code | Short Description                | Reference     |</span></td><td class="lineno" valign="top"></td></tr>
452      <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>
453      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 110       | Response is Stale                | Section 3.6.1 |</span></td><td class="lineno" valign="top"></td></tr>
454      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 111       | Revalidation Failed              | Section 3.6.2 |</span></td><td class="lineno" valign="top"></td></tr>
455      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 112       | Disconnected Operation           | Section 3.6.3 |</span></td><td class="lineno" valign="top"></td></tr>
456      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 113       | Heuristic Expiration             | Section 3.6.4 |</span></td><td class="lineno" valign="top"></td></tr>
457      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 199       | Miscellaneous Warning            | Section 3.6.5 |</span></td><td class="lineno" valign="top"></td></tr>
458      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 214       | Transformation Applied           | Section 3.6.6 |</span></td><td class="lineno" valign="top"></td></tr>
459      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   | 299       | Miscellaneous Persistent Warning | Section 3.6.7 |</span></td><td class="lineno" valign="top"></td></tr>
460      <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>
461      <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>
462      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">3.9.</span>  Header Field Registration</td><td class="lineno" valign="top"></td></tr>
463      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
464      <tr><td class="lineno" valign="top"></td><td class="left">   The Message Header Field Registry located at &lt;http://www.iana.org/</td><td> </td><td class="right">   The Message Header Field Registry located at &lt;http://www.iana.org/</td><td class="lineno" valign="top"></td></tr>
465      <tr><td class="lineno" valign="top"></td><td class="left">   assignments/message-headers/message-header-index.html&gt; shall be</td><td> </td><td class="right">   assignments/message-headers/message-header-index.html&gt; shall be</td><td class="lineno" valign="top"></td></tr>
466      <tr><td class="lineno" valign="top"></td><td class="left">   updated with the permanent registrations below (see [RFC3864]):</td><td> </td><td class="right">   updated with the permanent registrations below (see [RFC3864]):</td><td class="lineno" valign="top"></td></tr>
467      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></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">   | Header Field Name | Protocol | Status   | Reference   |</td><td> </td><td class="right">   | Header Field Name | Protocol | Status   | Reference   |</td><td class="lineno" valign="top"></td></tr>
470      <tr><td class="lineno" valign="top"></td><td class="left">   +-------------------+----------+----------+-------------+</td><td> </td><td class="right">   +-------------------+----------+----------+-------------+</td><td class="lineno" valign="top"></td></tr>
471      <tr><td class="lineno" valign="top"></td><td class="left">   | Age               | http     | standard | Section 3.1 |</td><td> </td><td class="right">   | Age               | http     | standard | Section 3.1 |</td><td class="lineno" valign="top"></td></tr>
472      <tr><td class="lineno" valign="top"></td><td class="left">   | Cache-Control     | http     | standard | Section 3.2 |</td><td> </td><td class="right">   | Cache-Control     | http     | standard | Section 3.2 |</td><td class="lineno" valign="top"></td></tr>
473      <tr><td class="lineno" valign="top"></td><td class="left">   | Expires           | http     | standard | Section 3.3 |</td><td> </td><td class="right">   | Expires           | http     | standard | Section 3.3 |</td><td class="lineno" valign="top"></td></tr>
474      <tr><td class="lineno" valign="top"></td><td class="left">   | Pragma            | http     | standard | Section 3.4 |</td><td> </td><td class="right">   | Pragma            | http     | standard | Section 3.4 |</td><td class="lineno" valign="top"></td></tr>
475      <tr><td class="lineno" valign="top"></td><td class="left">   | Vary              | http     | standard | Section 3.5 |</td><td> </td><td class="right">   | Vary              | http     | standard | Section 3.5 |</td><td class="lineno" valign="top"></td></tr>
476      <tr><td class="lineno" valign="top"></td><td class="left">   | Warning           | http     | standard | Section 3.6 |</td><td> </td><td class="right">   | Warning           | http     | standard | Section 3.6 |</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"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
479      <tr><td class="lineno" valign="top"></td><td class="left">   The change controller is: "IETF (iesg@ietf.org) - Internet</td><td> </td><td class="right">   The change controller is: "IETF (iesg@ietf.org) - Internet</td><td class="lineno" valign="top"></td></tr>
480      <tr><td class="lineno" valign="top"></td><td class="left">   Engineering Task Force".</td><td> </td><td class="right">   Engineering Task Force".</td><td class="lineno" valign="top"></td></tr>
481      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
482      <tr><td><a name="diff0038" /></td></tr>
483      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">6</span>.  Security Considerations</td><td> </td><td class="rblock"><span class="insert">4</span>.  Security Considerations</td><td class="lineno" valign="top"></td></tr>
484      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
485      <tr><td class="lineno" valign="top"></td><td class="left">   Caches expose additional potential vulnerabilities, since the</td><td> </td><td class="right">   Caches expose additional potential vulnerabilities, since the</td><td class="lineno" valign="top"></td></tr>
486      <tr><td class="lineno" valign="top"></td><td class="left">   contents of the cache represent an attractive target for malicious</td><td> </td><td class="right">   contents of the cache represent an attractive target for malicious</td><td class="lineno" valign="top"></td></tr>
487      <tr><td class="lineno" valign="top"></td><td class="left">   exploitation.  Because cache contents persist after an HTTP request</td><td> </td><td class="right">   exploitation.  Because cache contents persist after an HTTP request</td><td class="lineno" valign="top"></td></tr>
488      <tr><td class="lineno" valign="top"></td><td class="left">   is complete, an attack on the cache can reveal information long after</td><td> </td><td class="right">   is complete, an attack on the cache can reveal information long after</td><td class="lineno" valign="top"></td></tr>
489      <tr><td class="lineno" valign="top"></td><td class="left">   a user believes that the information has been removed from the</td><td> </td><td class="right">   a user believes that the information has been removed from the</td><td class="lineno" valign="top"></td></tr>
490      <tr><td class="lineno" valign="top"></td><td class="left">   network.  Therefore, cache contents need to be protected as sensitive</td><td> </td><td class="right">   network.  Therefore, cache contents need to be protected as sensitive</td><td class="lineno" valign="top"></td></tr>
491      <tr><td class="lineno" valign="top"></td><td class="left">   information.</td><td> </td><td class="right">   information.</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><a name="diff0039" /></td></tr>
494      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">7</span>.  Acknowledgments</td><td> </td><td class="rblock"><span class="insert">5</span>.  Acknowledgments</td><td class="lineno" valign="top"></td></tr>
495      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
496      <tr><td class="lineno" valign="top"></td><td class="left">   See Section 11 of [Part1].</td><td> </td><td class="right">   See Section 11 of [Part1].</td><td class="lineno" valign="top"></td></tr>
497      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
498      <tr><td><a name="diff0040" /></td></tr>
499      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">8</span>.  References</td><td> </td><td class="rblock"><span class="insert">6</span>.  References</td><td class="lineno" valign="top"></td></tr>
500      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
501      <tr><td><a name="diff0041" /></td></tr>
502      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">8</span>.1.  Normative References</td><td> </td><td class="rblock"><span class="insert">6</span>.1.  Normative References</td><td class="lineno" valign="top"></td></tr>
503      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
504      <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>
505      <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>
506      <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>
507      <tr><td><a name="diff0042" /></td></tr>
508      <tr><td class="lineno" valign="top"></td><td class="lblock">              and Message Parsing", <span class="delete">draft-ietf-httpbis-p1-messaging-17</span></td><td> </td><td class="rblock">              and Message Parsing", <span class="insert">draft-ietf-httpbis-p1-messaging-18</span></td><td class="lineno" valign="top"></td></tr>
509      <tr><td class="lineno" valign="top"></td><td class="lblock">              (work in progress), <span class="delete">October 2011.</span></td><td> </td><td class="rblock">              (work in progress), <span class="insert">January 2012.</span></td><td class="lineno" valign="top"></td></tr>
510      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
511      <tr><td class="lineno" valign="top"></td><td class="left">   [Part2]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part2]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
512      <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>
513      <tr><td class="lineno" valign="top"></td><td class="left">              and J. Reschke, Ed., "HTTP/1.1, part 2: Message</td><td> </td><td class="right">              and J. Reschke, Ed., "HTTP/1.1, part 2: Message</td><td class="lineno" valign="top"></td></tr>
514      <tr><td><a name="diff0043" /></td></tr>
515      <tr><td class="lineno" valign="top"></td><td class="lblock">              Semantics", <span class="delete">draft-ietf-httpbis-p2-semantics-17</span> (work in</td><td> </td><td class="rblock">              Semantics", <span class="insert">draft-ietf-httpbis-p2-semantics-18</span> (work in</td><td class="lineno" valign="top"></td></tr>
516      <tr><td class="lineno" valign="top"></td><td class="lblock">              progress), <span class="delete">October 2011.</span></td><td> </td><td class="rblock">              progress), <span class="insert">January 2012.</span></td><td class="lineno" valign="top"></td></tr>
517      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
518      <tr><td class="lineno" valign="top"></td><td class="left">   [Part4]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part4]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
519      <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>
520      <tr><td class="lineno" valign="top"></td><td class="left">              and J. Reschke, Ed., "HTTP/1.1, part 4: Conditional</td><td> </td><td class="right">              and J. Reschke, Ed., "HTTP/1.1, part 4: Conditional</td><td class="lineno" valign="top"></td></tr>
521      <tr><td><a name="diff0044" /></td></tr>
522      <tr><td class="lineno" valign="top"></td><td class="lblock">              Requests", <span class="delete">draft-ietf-httpbis-p4-conditional-17</span> (work in</td><td> </td><td class="rblock">              Requests", <span class="insert">draft-ietf-httpbis-p4-conditional-18</span> (work in</td><td class="lineno" valign="top"></td></tr>
523      <tr><td class="lineno" valign="top"></td><td class="lblock">              progress), <span class="delete">October 2011.</span></td><td> </td><td class="rblock">              progress), <span class="insert">January 2012.</span></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">   [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>
526      <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>
527      <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>
528      <tr><td><a name="diff0045" /></td></tr>
529      <tr><td class="lineno" valign="top"></td><td class="lblock">              Partial Responses", <span class="delete">draft-ietf-httpbis-p5-range-17</span> (work</td><td> </td><td class="rblock">              Partial Responses", <span class="insert">draft-ietf-httpbis-p5-range-18</span> (work</td><td class="lineno" valign="top"></td></tr>
530      <tr><td class="lineno" valign="top"></td><td class="lblock">              in progress), <span class="delete">October 2011.</span></td><td> </td><td class="rblock">              in progress), <span class="insert">January 2012.</span></td><td class="lineno" valign="top"></td></tr>
531      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
532      <tr><td class="lineno" valign="top"></td><td class="left">   [Part7]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part7]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
533      <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>
534      <tr><td class="lineno" valign="top"></td><td class="left">              and J. Reschke, Ed., "HTTP/1.1, part 7: Authentication",</td><td> </td><td class="right">              and J. Reschke, Ed., "HTTP/1.1, part 7: Authentication",</td><td class="lineno" valign="top"></td></tr>
535      <tr><td><a name="diff0046" /></td></tr>
536      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p7-auth-17</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p7-auth-18</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
537      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">October 2011.</span></td><td> </td><td class="rblock">              <span class="insert">January 2012.</span></td><td class="lineno" valign="top"></td></tr>
538      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
539      <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>
540      <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>
541      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
542      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax</td><td> </td><td class="right">   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax</td><td class="lineno" valign="top"></td></tr>
543      <tr><td class="lineno" valign="top"></td><td class="left">              Specifications: ABNF", STD 68, RFC 5234, January 2008.</td><td> </td><td class="right">              Specifications: ABNF", STD 68, RFC 5234, January 2008.</td><td class="lineno" valign="top"></td></tr>
544      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
545      <tr><td><a name="diff0047" /></td></tr>
546      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">8</span>.2.  Informative References</td><td> </td><td class="rblock"><span class="insert">6</span>.2.  Informative References</td><td class="lineno" valign="top"></td></tr>
547      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
548      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC1305]  Mills, D., "Network Time Protocol (Version 3)</td><td> </td><td class="right">   [RFC1305]  Mills, D., "Network Time Protocol (Version 3)</td><td class="lineno" valign="top"></td></tr>
549      <tr><td class="lineno" valign="top"></td><td class="left">              Specification, Implementation", RFC 1305, March 1992.</td><td> </td><td class="right">              Specification, Implementation", RFC 1305, March 1992.</td><td class="lineno" valign="top"></td></tr>
550      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
551      <tr><td class="lineno" valign="top"></td><td class="left">   [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>
552      <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>
553      <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>
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">   [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>
556      <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>
557      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
558      <tr bgcolor="gray" ><td></td><th><a name="part-l9" /><small>skipping to change at</small><em> page 42, line 22</em></th><th> </th><th><a name="part-r9" /><small>skipping to change at</small><em> page 43, line 15</em></th><td></td></tr>
559      <tr><td class="lineno" valign="top"></td><td class="left">C.18.  Since draft-ietf-httpbis-p6-cache-16</td><td> </td><td class="right">C.18.  Since draft-ietf-httpbis-p6-cache-16</td><td class="lineno" valign="top"></td></tr>
560      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
561      <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>
562      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
563      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/186&gt;: "Document</td><td> </td><td class="right">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/186&gt;: "Document</td><td class="lineno" valign="top"></td></tr>
564      <tr><td class="lineno" valign="top"></td><td class="left">      HTTP's error-handling philosophy"</td><td> </td><td class="right">      HTTP's error-handling philosophy"</td><td class="lineno" valign="top"></td></tr>
565      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
566      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/317&gt;: "Cache-Control</td><td> </td><td class="right">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/317&gt;: "Cache-Control</td><td class="lineno" valign="top"></td></tr>
567      <tr><td class="lineno" valign="top"></td><td class="left">      directive case sensitivity"</td><td> </td><td class="right">      directive case sensitivity"</td><td class="lineno" valign="top"></td></tr>
568      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
569      <tr><td><a name="diff0048" /></td></tr>
570      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">C.19.  Since draft-ietf-httpbis-p6-cache-17</span></td><td class="lineno" valign="top"></td></tr>
571      <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>
572      <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>
573      <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>
574      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/293&gt;: "Interaction</span></td><td class="lineno" valign="top"></td></tr>
575      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      of request and response Cache-Control"</span></td><td class="lineno" valign="top"></td></tr>
576      <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>
577      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/212&gt;: "Refining age</span></td><td class="lineno" valign="top"></td></tr>
578      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      for 1.1 proxy chains"</span></td><td class="lineno" valign="top"></td></tr>
579      <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>
580      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/274&gt;: "warn-code</span></td><td class="lineno" valign="top"></td></tr>
581      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      registry"</span></td><td class="lineno" valign="top"></td></tr>
582      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
583      <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>
584      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
585      <tr><td><a name="diff0049" /></td></tr>
586      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">1</span></td><td class="lineno" valign="top"></td></tr>
587      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      110 Response is Stale (warn code)  31</span></td><td class="lineno" valign="top"></td></tr>
588      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      111 Revalidation Failed (warn code)  31</span></td><td class="lineno" valign="top"></td></tr>
589      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      112 Disconnected Operation (warn code)  31</span></td><td class="lineno" valign="top"></td></tr>
590      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      113 Heuristic Expiration (warn code)  31</span></td><td class="lineno" valign="top"></td></tr>
591      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      199 Miscellaneous Warning (warn code)  31</span></td><td class="lineno" valign="top"></td></tr>
592      <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>
593      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   2</span></td><td class="lineno" valign="top"></td></tr>
594      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      214 Transformation Applied (warn code)  31</span></td><td class="lineno" valign="top"></td></tr>
595      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      299 Miscellaneous Persistent Warning (warn code)  31</span></td><td class="lineno" valign="top"></td></tr>
596      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
597      <tr><td class="lineno" valign="top"></td><td class="left">   A</td><td> </td><td class="right">   A</td><td class="lineno" valign="top"></td></tr>
598      <tr><td class="lineno" valign="top"></td><td class="left">      age  6</td><td> </td><td class="right">      age  6</td><td class="lineno" valign="top"></td></tr>
599      <tr><td class="lineno" valign="top"></td><td class="left">      Age header field  20</td><td> </td><td class="right">      Age header field  20</td><td class="lineno" valign="top"></td></tr>
600      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
601      <tr><td class="lineno" valign="top"></td><td class="left">   C</td><td> </td><td class="right">   C</td><td class="lineno" valign="top"></td></tr>
602      <tr><td class="lineno" valign="top"></td><td class="left">      cache  5</td><td> </td><td class="right">      cache  5</td><td class="lineno" valign="top"></td></tr>
603      <tr><td class="lineno" valign="top"></td><td class="left">      Cache Directives</td><td> </td><td class="right">      Cache Directives</td><td class="lineno" valign="top"></td></tr>
604      <tr><td class="lineno" valign="top"></td><td class="left">         max-age  22, 25</td><td> </td><td class="right">         max-age  22, 25</td><td class="lineno" valign="top"></td></tr>
605      <tr><td class="lineno" valign="top"></td><td class="left">         max-stale  22</td><td> </td><td class="right">         max-stale  22</td><td class="lineno" valign="top"></td></tr>
606      <tr><td class="lineno" valign="top"></td><td class="left">         min-fresh  22</td><td> </td><td class="right">         min-fresh  22</td><td class="lineno" valign="top"></td></tr>
607      <tr><td class="lineno" valign="top"></td><td class="left">         must-revalidate  25</td><td> </td><td class="right">         must-revalidate  25</td><td class="lineno" valign="top"></td></tr>
608      <tr><td><a name="diff0050" /></td></tr>
609      <tr><td class="lineno" valign="top"></td><td class="lblock">         no-cache  2<span class="delete">1</span>, 24</td><td> </td><td class="rblock">         no-cache  2<span class="insert">2</span>, 24</td><td class="lineno" valign="top"></td></tr>
610      <tr><td class="lineno" valign="top"></td><td class="left">         no-store  22, 24</td><td> </td><td class="right">         no-store  22, 24</td><td class="lineno" valign="top"></td></tr>
611      <tr><td class="lineno" valign="top"></td><td class="left">         no-transform  23, 25</td><td> </td><td class="right">         no-transform  23, 25</td><td class="lineno" valign="top"></td></tr>
612      <tr><td class="lineno" valign="top"></td><td class="left">         only-if-cached  23</td><td> </td><td class="right">         only-if-cached  23</td><td class="lineno" valign="top"></td></tr>
613      <tr><td class="lineno" valign="top"></td><td class="left">         private  23</td><td> </td><td class="right">         private  23</td><td class="lineno" valign="top"></td></tr>
614      <tr><td class="lineno" valign="top"></td><td class="left">         proxy-revalidate  25</td><td> </td><td class="right">         proxy-revalidate  25</td><td class="lineno" valign="top"></td></tr>
615      <tr><td class="lineno" valign="top"></td><td class="left">         public  23</td><td> </td><td class="right">         public  23</td><td class="lineno" valign="top"></td></tr>
616      <tr><td class="lineno" valign="top"></td><td class="left">         s-maxage  25</td><td> </td><td class="right">         s-maxage  25</td><td class="lineno" valign="top"></td></tr>
617      <tr><td class="lineno" valign="top"></td><td class="left">      cache entry  8</td><td> </td><td class="right">      cache entry  8</td><td class="lineno" valign="top"></td></tr>
618      <tr><td class="lineno" valign="top"></td><td class="left">      cache key  8</td><td> </td><td class="right">      cache key  8</td><td class="lineno" valign="top"></td></tr>
619      <tr><td class="lineno" valign="top"></td><td class="left">      Cache-Control header field  21</td><td> </td><td class="right">      Cache-Control header field  21</td><td class="lineno" valign="top"></td></tr>
620      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
621      <tr bgcolor="gray" ><td></td><th><a name="part-l10" /><small>skipping to change at</small><em> page 43, line 50</em></th><th> </th><th><a name="part-r10" /><small>skipping to change at</small><em> page 45, line 19</em></th><td></td></tr>
622      <tr><td class="lineno" valign="top"></td><td class="left">         Cache Directive  22, 25</td><td> </td><td class="right">         Cache Directive  22, 25</td><td class="lineno" valign="top"></td></tr>
623      <tr><td class="lineno" valign="top"></td><td class="left">      max-stale</td><td> </td><td class="right">      max-stale</td><td class="lineno" valign="top"></td></tr>
624      <tr><td class="lineno" valign="top"></td><td class="left">         Cache Directive  22</td><td> </td><td class="right">         Cache Directive  22</td><td class="lineno" valign="top"></td></tr>
625      <tr><td class="lineno" valign="top"></td><td class="left">      min-fresh</td><td> </td><td class="right">      min-fresh</td><td class="lineno" valign="top"></td></tr>
626      <tr><td class="lineno" valign="top"></td><td class="left">         Cache Directive  22</td><td> </td><td class="right">         Cache Directive  22</td><td class="lineno" valign="top"></td></tr>
627      <tr><td class="lineno" valign="top"></td><td class="left">      must-revalidate</td><td> </td><td class="right">      must-revalidate</td><td class="lineno" valign="top"></td></tr>
628      <tr><td class="lineno" valign="top"></td><td class="left">         Cache Directive  25</td><td> </td><td class="right">         Cache Directive  25</td><td class="lineno" valign="top"></td></tr>
629      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
630      <tr><td class="lineno" valign="top"></td><td class="left">   N</td><td> </td><td class="right">   N</td><td class="lineno" valign="top"></td></tr>
631      <tr><td class="lineno" valign="top"></td><td class="left">      no-cache</td><td> </td><td class="right">      no-cache</td><td class="lineno" valign="top"></td></tr>
632      <tr><td><a name="diff0051" /></td></tr>
633      <tr><td class="lineno" valign="top"></td><td class="lblock">         Cache Directive  2<span class="delete">1</span>, 24</td><td> </td><td class="rblock">         Cache Directive  2<span class="insert">2</span>, 24</td><td class="lineno" valign="top"></td></tr>
634      <tr><td class="lineno" valign="top"></td><td class="left">      no-store</td><td> </td><td class="right">      no-store</td><td class="lineno" valign="top"></td></tr>
635      <tr><td class="lineno" valign="top"></td><td class="left">         Cache Directive  22, 24</td><td> </td><td class="right">         Cache Directive  22, 24</td><td class="lineno" valign="top"></td></tr>
636      <tr><td class="lineno" valign="top"></td><td class="left">      no-transform</td><td> </td><td class="right">      no-transform</td><td class="lineno" valign="top"></td></tr>
637      <tr><td class="lineno" valign="top"></td><td class="left">         Cache Directive  23, 25</td><td> </td><td class="right">         Cache Directive  23, 25</td><td class="lineno" valign="top"></td></tr>
638      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
639      <tr><td class="lineno" valign="top"></td><td class="left">   O</td><td> </td><td class="right">   O</td><td class="lineno" valign="top"></td></tr>
640      <tr><td class="lineno" valign="top"></td><td class="left">      only-if-cached</td><td> </td><td class="right">      only-if-cached</td><td class="lineno" valign="top"></td></tr>
641      <tr><td class="lineno" valign="top"></td><td class="left">         Cache Directive  23</td><td> </td><td class="right">         Cache Directive  23</td><td class="lineno" valign="top"></td></tr>
642      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
643      <tr><td class="lineno" valign="top"></td><td class="left">   P</td><td> </td><td class="right">   P</td><td class="lineno" valign="top"></td></tr>
644      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
645      <tr bgcolor="gray" ><td></td><th><a name="part-l11" /><small>skipping to change at</small><em> page 44, line 35</em></th><th> </th><th><a name="part-r11" /><small>skipping to change at</small><em> page 46, line 4</em></th><td></td></tr>
646      <tr><td class="lineno" valign="top"></td><td class="left">      shared cache  5</td><td> </td><td class="right">      shared cache  5</td><td class="lineno" valign="top"></td></tr>
647      <tr><td class="lineno" valign="top"></td><td class="left">      stale  6</td><td> </td><td class="right">      stale  6</td><td class="lineno" valign="top"></td></tr>
648      <tr><td class="lineno" valign="top"></td><td class="left">      strong validator  7</td><td> </td><td class="right">      strong validator  7</td><td class="lineno" valign="top"></td></tr>
649      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
650      <tr><td class="lineno" valign="top"></td><td class="left">   V</td><td> </td><td class="right">   V</td><td class="lineno" valign="top"></td></tr>
651      <tr><td class="lineno" valign="top"></td><td class="left">      validator  6</td><td> </td><td class="right">      validator  6</td><td class="lineno" valign="top"></td></tr>
652      <tr><td class="lineno" valign="top"></td><td class="left">         strong  7</td><td> </td><td class="right">         strong  7</td><td class="lineno" valign="top"></td></tr>
653      <tr><td class="lineno" valign="top"></td><td class="left">      Vary header field  28</td><td> </td><td class="right">      Vary header field  28</td><td class="lineno" valign="top"></td></tr>
654      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
655      <tr><td class="lineno" valign="top"></td><td class="left">   W</td><td> </td><td class="right">   W</td><td class="lineno" valign="top"></td></tr>
656      <tr><td><a name="diff0052" /></td></tr>
657      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">      <span class="insert">Warn Codes</span></td><td class="lineno" valign="top"></td></tr>
658      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         110 Response is Stale  31</span></td><td class="lineno" valign="top"></td></tr>
659      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         111 Revalidation Failed  31</span></td><td class="lineno" valign="top"></td></tr>
660      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         112 Disconnected Operation  31</span></td><td class="lineno" valign="top"></td></tr>
661      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         113 Heuristic Expiration  31</span></td><td class="lineno" valign="top"></td></tr>
662      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         199 Miscellaneous Warning  31</span></td><td class="lineno" valign="top"></td></tr>
663      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         214 Transformation Applied  31</span></td><td class="lineno" valign="top"></td></tr>
664      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         299 Miscellaneous Persistent Warning  31</span></td><td class="lineno" valign="top"></td></tr>
665      <tr><td class="lineno" valign="top"></td><td class="left">      Warning header field  29</td><td> </td><td class="right">      Warning header field  29</td><td class="lineno" valign="top"></td></tr>
666      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
667      <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>
668      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
669      <tr><td class="lineno" valign="top"></td><td class="left">   Roy T. Fielding (editor)</td><td> </td><td class="right">   Roy T. Fielding (editor)</td><td class="lineno" valign="top"></td></tr>
670      <tr><td class="lineno" valign="top"></td><td class="left">   Adobe Systems Incorporated</td><td> </td><td class="right">   Adobe Systems Incorporated</td><td class="lineno" valign="top"></td></tr>
671      <tr><td class="lineno" valign="top"></td><td class="left">   345 Park Ave</td><td> </td><td class="right">   345 Park Ave</td><td class="lineno" valign="top"></td></tr>
672      <tr><td class="lineno" valign="top"></td><td class="left">   San Jose, CA  95110</td><td> </td><td class="right">   San Jose, CA  95110</td><td class="lineno" valign="top"></td></tr>
673      <tr><td class="lineno" valign="top"></td><td class="left">   USA</td><td> </td><td class="right">   USA</td><td class="lineno" valign="top"></td></tr>
674      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
675
676     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
677     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 52 change blocks.&nbsp;</a></th></tr>
678     <tr class="stats"><td></td><th><i>94 lines changed or deleted</i></th><th><i> </i></th><th><i>183 lines changed or added</i></th><td></td></tr>
679     <tr><td colspan="5" align="center" class="small"><br/>This html diff was produced by rfcdiff 1.38. The latest version is available from <a href="http://www.tools.ietf.org/tools/rfcdiff/" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>
680   </table>
681   </body>
682   </html>
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