source: draft-ietf-httpbis/diffs/draft-ietf-httpbis-p6-cache-04-from-3.diff.html @ 325

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41  <table border="0" cellpadding="0" cellspacing="0">
42  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p6-cache-03.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p6-cache-04.txt&nbsp;</th><th></th></tr>
43      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
44      <tr><td class="lineno" valign="top"></td><td class="left">Network Working Group                                   R. Fielding, Ed.</td><td> </td><td class="right">Network Working Group                                   R. Fielding, Ed.</td><td class="lineno" valign="top"></td></tr>
45      <tr><td class="lineno" valign="top"></td><td class="left">Internet-Draft                                              Day Software</td><td> </td><td class="right">Internet-Draft                                              Day Software</td><td class="lineno" valign="top"></td></tr>
46      <tr><td class="lineno" valign="top"></td><td class="left">Obsoletes: 2616 (if approved)                                  J. Gettys</td><td> </td><td class="right">Obsoletes: 2616 (if approved)                                  J. Gettys</td><td class="lineno" valign="top"></td></tr>
47      <tr><td class="lineno" valign="top"></td><td class="left">Intended status: Standards Track                    One Laptop per Child</td><td> </td><td class="right">Intended status: Standards Track                    One Laptop per Child</td><td class="lineno" valign="top"></td></tr>
48      <tr><td><a name="diff0001" /></td></tr>
49      <tr><td class="lineno" valign="top"></td><td class="lblock">Expires: <span class="delete">December 19, 2008</span>                                      J. Mogul</td><td> </td><td class="rblock">Expires: <span class="insert">March 2, 2009    </span>                                      J. Mogul</td><td class="lineno" valign="top"></td></tr>
50      <tr><td class="lineno" valign="top"></td><td class="left">                                                                      HP</td><td> </td><td class="right">                                                                      HP</td><td class="lineno" valign="top"></td></tr>
51      <tr><td class="lineno" valign="top"></td><td class="left">                                                              H. Frystyk</td><td> </td><td class="right">                                                              H. Frystyk</td><td class="lineno" valign="top"></td></tr>
52      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
53      <tr><td class="lineno" valign="top"></td><td class="left">                                                             L. Masinter</td><td> </td><td class="right">                                                             L. Masinter</td><td class="lineno" valign="top"></td></tr>
54      <tr><td class="lineno" valign="top"></td><td class="left">                                                           Adobe Systems</td><td> </td><td class="right">                                                           Adobe Systems</td><td class="lineno" valign="top"></td></tr>
55      <tr><td class="lineno" valign="top"></td><td class="left">                                                                P. Leach</td><td> </td><td class="right">                                                                P. Leach</td><td class="lineno" valign="top"></td></tr>
56      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
57      <tr><td class="lineno" valign="top"></td><td class="left">                                                          T. Berners-Lee</td><td> </td><td class="right">                                                          T. Berners-Lee</td><td class="lineno" valign="top"></td></tr>
58      <tr><td class="lineno" valign="top"></td><td class="left">                                                                 W3C/MIT</td><td> </td><td class="right">                                                                 W3C/MIT</td><td class="lineno" valign="top"></td></tr>
59      <tr><td class="lineno" valign="top"></td><td class="left">                                                           Y. Lafon, Ed.</td><td> </td><td class="right">                                                           Y. Lafon, Ed.</td><td class="lineno" valign="top"></td></tr>
60      <tr><td class="lineno" valign="top"></td><td class="left">                                                                     W3C</td><td> </td><td class="right">                                                                     W3C</td><td class="lineno" valign="top"></td></tr>
61      <tr><td class="lineno" valign="top"></td><td class="left">                                                         J. Reschke, Ed.</td><td> </td><td class="right">                                                         J. Reschke, Ed.</td><td class="lineno" valign="top"></td></tr>
62      <tr><td class="lineno" valign="top"></td><td class="left">                                                              greenbytes</td><td> </td><td class="right">                                                              greenbytes</td><td class="lineno" valign="top"></td></tr>
63      <tr><td><a name="diff0002" /></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                         <span class="delete">  June 17</span>, 2008</td><td> </td><td class="rblock">                                                         <span class="insert">August 29</span>, 2008</td><td class="lineno" valign="top"></td></tr>
65      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
66      <tr><td class="lineno" valign="top"></td><td class="left">                       HTTP/1.1, part 6: Caching</td><td> </td><td class="right">                       HTTP/1.1, part 6: Caching</td><td class="lineno" valign="top"></td></tr>
67      <tr><td><a name="diff0003" /></td></tr>
68      <tr><td class="lineno" valign="top"></td><td class="lblock">                     draft-ietf-httpbis-p6-cache-0<span class="delete">3</span></td><td> </td><td class="rblock">                     draft-ietf-httpbis-p6-cache-0<span class="insert">4</span></td><td class="lineno" valign="top"></td></tr>
69      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
70      <tr><td class="lineno" valign="top"></td><td class="left">Status of this Memo</td><td> </td><td class="right">Status of this Memo</td><td class="lineno" valign="top"></td></tr>
71      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
72      <tr><td class="lineno" valign="top"></td><td class="left">   By submitting this Internet-Draft, each author represents that any</td><td> </td><td class="right">   By submitting this Internet-Draft, each author represents that any</td><td class="lineno" valign="top"></td></tr>
73      <tr><td class="lineno" valign="top"></td><td class="left">   applicable patent or other IPR claims of which he or she is aware</td><td> </td><td class="right">   applicable patent or other IPR claims of which he or she is aware</td><td class="lineno" valign="top"></td></tr>
74      <tr><td class="lineno" valign="top"></td><td class="left">   have been or will be disclosed, and any of which he or she becomes</td><td> </td><td class="right">   have been or will be disclosed, and any of which he or she becomes</td><td class="lineno" valign="top"></td></tr>
75      <tr><td class="lineno" valign="top"></td><td class="left">   aware will be disclosed, in accordance with Section 6 of BCP 79.</td><td> </td><td class="right">   aware will be disclosed, in accordance with Section 6 of BCP 79.</td><td class="lineno" valign="top"></td></tr>
76      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
77      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are working documents of the Internet Engineering</td><td> </td><td class="right">   Internet-Drafts are working documents of the Internet Engineering</td><td class="lineno" valign="top"></td></tr>
78      <tr><td class="lineno" valign="top"></td><td class="left">   Task Force (IETF), its areas, and its working groups.  Note that</td><td> </td><td class="right">   Task Force (IETF), its areas, and its working groups.  Note that</td><td class="lineno" valign="top"></td></tr>
79      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
80      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 1, line 49</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 1, line 49</em></th><td></td></tr>
81      <tr><td class="lineno" valign="top"></td><td class="left">   and may be updated, replaced, or obsoleted by other documents at any</td><td> </td><td class="right">   and may be updated, replaced, or obsoleted by other documents at any</td><td class="lineno" valign="top"></td></tr>
82      <tr><td class="lineno" valign="top"></td><td class="left">   time.  It is inappropriate to use Internet-Drafts as reference</td><td> </td><td class="right">   time.  It is inappropriate to use Internet-Drafts as reference</td><td class="lineno" valign="top"></td></tr>
83      <tr><td class="lineno" valign="top"></td><td class="left">   material or to cite them other than as "work in progress."</td><td> </td><td class="right">   material or to cite them other than as "work in progress."</td><td class="lineno" valign="top"></td></tr>
84      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
85      <tr><td class="lineno" valign="top"></td><td class="left">   The list of current Internet-Drafts can be accessed at</td><td> </td><td class="right">   The list of current Internet-Drafts can be accessed at</td><td class="lineno" valign="top"></td></tr>
86      <tr><td class="lineno" valign="top"></td><td class="left">   http://www.ietf.org/ietf/1id-abstracts.txt.</td><td> </td><td class="right">   http://www.ietf.org/ietf/1id-abstracts.txt.</td><td class="lineno" valign="top"></td></tr>
87      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
88      <tr><td class="lineno" valign="top"></td><td class="left">   The list of Internet-Draft Shadow Directories can be accessed at</td><td> </td><td class="right">   The list of Internet-Draft Shadow Directories can be accessed at</td><td class="lineno" valign="top"></td></tr>
89      <tr><td class="lineno" valign="top"></td><td class="left">   http://www.ietf.org/shadow.html.</td><td> </td><td class="right">   http://www.ietf.org/shadow.html.</td><td class="lineno" valign="top"></td></tr>
90      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
91      <tr><td><a name="diff0004" /></td></tr>
92      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on <span class="delete">December 19, 2008</span>.</td><td> </td><td class="rblock">   This Internet-Draft will expire on <span class="insert">March 2, 2009</span>.</td><td class="lineno" valign="top"></td></tr>
93      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
94      <tr><td class="lineno" valign="top"></td><td class="left">Abstract</td><td> </td><td class="right">Abstract</td><td class="lineno" valign="top"></td></tr>
95      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
96      <tr><td class="lineno" valign="top"></td><td class="left">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td> </td><td class="right">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td class="lineno" valign="top"></td></tr>
97      <tr><td class="lineno" valign="top"></td><td class="left">   protocol for distributed, collaborative, hypermedia information</td><td> </td><td class="right">   protocol for distributed, collaborative, hypermedia information</td><td class="lineno" valign="top"></td></tr>
98      <tr><td class="lineno" valign="top"></td><td class="left">   systems.  HTTP has been in use by the World Wide Web global</td><td> </td><td class="right">   systems.  HTTP has been in use by the World Wide Web global</td><td class="lineno" valign="top"></td></tr>
99      <tr><td class="lineno" valign="top"></td><td class="left">   information initiative since 1990.  This document is Part 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>
100      <tr><td class="lineno" valign="top"></td><td class="left">   seven-part specification that defines the protocol referred to as</td><td> </td><td class="right">   seven-part specification that defines the protocol referred to as</td><td class="lineno" valign="top"></td></tr>
101      <tr><td class="lineno" valign="top"></td><td class="left">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.  Part 6 defines</td><td> </td><td class="right">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.  Part 6 defines</td><td class="lineno" valign="top"></td></tr>
102      <tr><td class="lineno" valign="top"></td><td class="left">   requirements on HTTP caches and the associated header fields that</td><td> </td><td class="right">   requirements on HTTP caches and the associated header fields that</td><td class="lineno" valign="top"></td></tr>
103      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
104      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 4, line 20</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 4, line 20</em></th><td></td></tr>
105      <tr><td class="lineno" valign="top"></td><td class="left">     20.2. Informative References . . . . . . . . . . . . . . . . . . 44</td><td> </td><td class="right">     20.2. Informative References . . . . . . . . . . . . . . . . . . 44</td><td class="lineno" valign="top"></td></tr>
106      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix A.  Compatibility with Previous Versions  . . . . . . . . 44</td><td> </td><td class="right">   Appendix A.  Compatibility with Previous Versions  . . . . . . . . 44</td><td class="lineno" valign="top"></td></tr>
107      <tr><td class="lineno" valign="top"></td><td class="left">     A.1.  Changes from RFC 2068  . . . . . . . . . . . . . . . . . . 44</td><td> </td><td class="right">     A.1.  Changes from RFC 2068  . . . . . . . . . . . . . . . . . . 44</td><td class="lineno" valign="top"></td></tr>
108      <tr><td class="lineno" valign="top"></td><td class="left">     A.2.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . . 45</td><td> </td><td class="right">     A.2.  Changes from RFC 2616  . . . . . . . . . . . . . . . . . . 45</td><td class="lineno" valign="top"></td></tr>
109      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix B.  Change Log (to be removed by RFC Editor before</td><td> </td><td class="right">   Appendix B.  Change Log (to be removed by RFC Editor before</td><td class="lineno" valign="top"></td></tr>
110      <tr><td class="lineno" valign="top"></td><td class="left">                publication)  . . . . . . . . . . . . . . . . . . . . 45</td><td> </td><td class="right">                publication)  . . . . . . . . . . . . . . . . . . . . 45</td><td class="lineno" valign="top"></td></tr>
111      <tr><td class="lineno" valign="top"></td><td class="left">     B.1.  Since RFC2616  . . . . . . . . . . . . . . . . . . . . . . 45</td><td> </td><td class="right">     B.1.  Since RFC2616  . . . . . . . . . . . . . . . . . . . . . . 45</td><td class="lineno" valign="top"></td></tr>
112      <tr><td class="lineno" valign="top"></td><td class="left">     B.2.  Since draft-ietf-httpbis-p6-cache-00 . . . . . . . . . . . 45</td><td> </td><td class="right">     B.2.  Since draft-ietf-httpbis-p6-cache-00 . . . . . . . . . . . 45</td><td class="lineno" valign="top"></td></tr>
113      <tr><td class="lineno" valign="top"></td><td class="left">     B.3.  Since draft-ietf-httpbis-p6-cache-01 . . . . . . . . . . . 46</td><td> </td><td class="right">     B.3.  Since draft-ietf-httpbis-p6-cache-01 . . . . . . . . . . . 46</td><td class="lineno" valign="top"></td></tr>
114      <tr><td class="lineno" valign="top"></td><td class="left">     B.4.  Since draft-ietf-httpbis-p6-cache-02 . . . . . . . . . . . 46</td><td> </td><td class="right">     B.4.  Since draft-ietf-httpbis-p6-cache-02 . . . . . . . . . . . 46</td><td class="lineno" valign="top"></td></tr>
115      <tr><td><a name="diff0005" /></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     B.5.  Since draft-ietf-httpbis-p6-cache-03 . . . . . . . . . . . 46</span></td><td class="lineno" valign="top"></td></tr>
117      <tr><td class="lineno" valign="top"></td><td class="left">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46</td><td> </td><td class="right">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46</td><td class="lineno" valign="top"></td></tr>
118      <tr><td class="lineno" valign="top"></td><td class="left">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 49</td><td> </td><td class="right">   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 49</td><td class="lineno" valign="top"></td></tr>
119      <tr><td class="lineno" valign="top"></td><td class="left">   Intellectual Property and Copyright Statements . . . . . . . . . . 52</td><td> </td><td class="right">   Intellectual Property and Copyright Statements . . . . . . . . . . 52</td><td class="lineno" valign="top"></td></tr>
120      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
121      <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>
122      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
123      <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>
124      <tr><td class="lineno" valign="top"></td><td class="left">   performance can be improved by the use of response caches, and</td><td> </td><td class="right">   performance can be improved by the use of response caches, and</td><td class="lineno" valign="top"></td></tr>
125      <tr><td class="lineno" valign="top"></td><td class="left">   includes a number of elements intended to make caching work as well</td><td> </td><td class="right">   includes a number of elements intended to make caching work as well</td><td class="lineno" valign="top"></td></tr>
126      <tr><td class="lineno" valign="top"></td><td class="left">   as possible.  Because these elements interact with each other, it is</td><td> </td><td class="right">   as possible.  Because these elements interact with each other, it is</td><td class="lineno" valign="top"></td></tr>
127      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
128      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 38, line 42</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 38, line 42</em></th><td></td></tr>
129      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP/1.1 caches SHOULD treat "Pragma: no-cache" as if the client had</td><td> </td><td class="right">   HTTP/1.1 caches SHOULD treat "Pragma: no-cache" as if the client had</td><td class="lineno" valign="top"></td></tr>
130      <tr><td class="lineno" valign="top"></td><td class="left">   sent "Cache-Control: no-cache".  No new Pragma directives will be</td><td> </td><td class="right">   sent "Cache-Control: no-cache".  No new Pragma directives will be</td><td class="lineno" valign="top"></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="left">   defined in HTTP.</td><td> </td><td class="right">   defined in HTTP.</td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
133      <tr><td class="lineno" valign="top"></td><td class="left">      Note: because the meaning of "Pragma: no-cache" as a response-</td><td> </td><td class="right">      Note: because the meaning of "Pragma: no-cache" as a response-</td><td class="lineno" valign="top"></td></tr>
134      <tr><td class="lineno" valign="top"></td><td class="left">      header field is not actually specified, it does not provide a</td><td> </td><td class="right">      header field is not actually specified, it does not provide a</td><td class="lineno" valign="top"></td></tr>
135      <tr><td class="lineno" valign="top"></td><td class="left">      reliable replacement for "Cache-Control: no-cache" in a response.</td><td> </td><td class="right">      reliable replacement for "Cache-Control: no-cache" in a response.</td><td class="lineno" valign="top"></td></tr>
136      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
137      <tr><td class="lineno" valign="top"></td><td class="left">16.5.  Vary</td><td> </td><td class="right">16.5.  Vary</td><td class="lineno" valign="top"></td></tr>
138      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
139      <tr><td><a name="diff0006" /></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="lblock">   The Vary <span class="delete">field value indicates the set of request-header fields that</span></td><td> </td><td class="rblock">   The Vary <span class="insert">response-header field's value indicates the set of request-</span></td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">fully determines, while the response is fresh, whether a cache is</span></td><td> </td><td class="rblock">   <span class="insert">header fields that fully determines, while the response is fresh,</span></td><td class="lineno" valign="top"></td></tr>
142      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">permitted to use the response to reply to a subsequent request</span></td><td> </td><td class="rblock">   <span class="insert">whether a cache is permitted to use the response to reply to a</span></td><td class="lineno" valign="top"></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">without revalidation.  For uncacheable or stale responses, the Vary</span></td><td> </td><td class="rblock">   <span class="insert">subsequent request without revalidation.  For uncacheable or stale</span></td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">field value advises the user agent about the criteria that were used</span></td><td> </td><td class="rblock">   <span class="insert">responses, the Vary field value advises the user agent about the</span></td><td class="lineno" valign="top"></td></tr>
145      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">to select the representation.  A Vary field value of "*" implies that</span></td><td> </td><td class="rblock">   <span class="insert">criteria that were used to select the representation.  A Vary field</span></td><td class="lineno" valign="top"></td></tr>
146      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">a cache cannot determine from the request headers of a subsequen</span>t</td><td> </td><td class="rblock">   <span class="insert">value of "*" implies that a cache cannot determine from the reques</span>t</td><td class="lineno" valign="top"></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">request whether this response is the appropriate representation.  Se</span>e</td><td> </td><td class="rblock">   <span class="insert">headers of a subsequent request whether this response is th</span>e</td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">Section 8 for use of the Vary header field by caches.</span></td><td> </td><td class="rblock">   <span class="insert">appropriate representation.  See Section 8 for use of the Vary header</span></td><td class="lineno" valign="top"></td></tr>
149      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   field by caches.</span></td><td class="lineno" valign="top"></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="left">     Vary  = "Vary" ":" ( "*" | 1#field-name )</td><td> </td><td class="right">     Vary  = "Vary" ":" ( "*" | 1#field-name )</td><td class="lineno" valign="top"></td></tr>
152      <tr><td><a name="diff0007" /></td></tr>
153      <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>
154      <tr><td class="lineno" valign="top"></td><td class="left">   An HTTP/1.1 server SHOULD include a Vary header field with any</td><td> </td><td class="right">   An HTTP/1.1 server SHOULD include a Vary header field with any</td><td class="lineno" valign="top"></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="left">   cacheable response that is subject to server-driven negotiation.</td><td> </td><td class="right">   cacheable response that is subject to server-driven negotiation.</td><td class="lineno" valign="top"></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="left">   Doing so allows a cache to properly interpret future requests on that</td><td> </td><td class="right">   Doing so allows a cache to properly interpret future requests on that</td><td class="lineno" valign="top"></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="left">   resource and informs the user agent about the presence of negotiation</td><td> </td><td class="right">   resource and informs the user agent about the presence of negotiation</td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="left">   on that resource.  A server MAY include a Vary header field with a</td><td> </td><td class="right">   on that resource.  A server MAY include a Vary header field with a</td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="left">   non-cacheable response that is subject to server-driven negotiation,</td><td> </td><td class="right">   non-cacheable response that is subject to server-driven negotiation,</td><td class="lineno" valign="top"></td></tr>
160      <tr><td class="lineno" valign="top"></td><td class="left">   since this might provide the user agent with useful information about</td><td> </td><td class="right">   since this might provide the user agent with useful information about</td><td class="lineno" valign="top"></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="left">   the dimensions over which the response varies at the time of the</td><td> </td><td class="right">   the dimensions over which the response varies at the time of the</td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="left">   response.</td><td> </td><td class="right">   response.</td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
164      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
165      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 43, line 27</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 43, line 27</em></th><td></td></tr>
166      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
167      <tr><td class="lineno" valign="top"></td><td class="left">   [ISO-8859-1]</td><td> </td><td class="right">   [ISO-8859-1]</td><td class="lineno" valign="top"></td></tr>
168      <tr><td class="lineno" valign="top"></td><td class="left">              International Organization for Standardization,</td><td> </td><td class="right">              International Organization for Standardization,</td><td class="lineno" valign="top"></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="left">              "Information technology -- 8-bit single-byte coded graphic</td><td> </td><td class="right">              "Information technology -- 8-bit single-byte coded graphic</td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="left">              character sets -- Part 1: Latin alphabet No. 1", ISO/</td><td> </td><td class="right">              character sets -- Part 1: Latin alphabet No. 1", ISO/</td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="left">              IEC 8859-1:1998, 1998.</td><td> </td><td class="right">              IEC 8859-1:1998, 1998.</td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="left">   [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>
174      <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>
175      <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>
176      <tr><td><a name="diff0008" /></td></tr>
177      <tr><td class="lineno" valign="top"></td><td class="lblock">              and Message Parsing", draft-ietf-httpbis-p1-messaging-0<span class="delete">3</span></td><td> </td><td class="rblock">              and Message Parsing", draft-ietf-httpbis-p1-messaging-0<span class="insert">4</span></td><td class="lineno" valign="top"></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="lblock">              (work in progress), <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              (work in progress), <span class="insert">August</span> 2008.</td><td class="lineno" valign="top"></td></tr>
179      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
180      <tr><td 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>
181      <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>
182      <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>
183      <tr><td><a name="diff0009" /></td></tr>
184      <tr><td class="lineno" valign="top"></td><td class="lblock">              Semantics", draft-ietf-httpbis-p2-semantics-0<span class="delete">3</span> (work in</td><td> </td><td class="rblock">              Semantics", draft-ietf-httpbis-p2-semantics-0<span class="insert">4</span> (work in</td><td class="lineno" valign="top"></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="lblock">              progress), <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              progress), <span class="insert">August</span> 2008.</td><td class="lineno" valign="top"></td></tr>
186      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
187      <tr><td class="lineno" valign="top"></td><td class="left">   [Part3]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part3]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
188      <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>
189      <tr><td class="lineno" valign="top"></td><td class="left">              and J. Reschke, Ed., "HTTP/1.1, part 3: Message Payload</td><td> </td><td class="right">              and J. Reschke, Ed., "HTTP/1.1, part 3: Message Payload</td><td class="lineno" valign="top"></td></tr>
190      <tr><td><a name="diff0010" /></td></tr>
191      <tr><td class="lineno" valign="top"></td><td class="lblock">              and Content Negotiation", draft-ietf-httpbis-p3-payload-0<span class="delete">3</span></td><td> </td><td class="rblock">              and Content Negotiation", draft-ietf-httpbis-p3-payload-0<span class="insert">4</span></td><td class="lineno" valign="top"></td></tr>
192      <tr><td class="lineno" valign="top"></td><td class="lblock">              (work in progress), <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              (work in progress), <span class="insert">August</span> 2008.</td><td class="lineno" valign="top"></td></tr>
193      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
194      <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>
195      <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>
196      <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>
197      <tr><td><a name="diff0011" /></td></tr>
198      <tr><td class="lineno" valign="top"></td><td class="lblock">              Requests", draft-ietf-httpbis-p4-conditional-0<span class="delete">3</span> (work in</td><td> </td><td class="rblock">              Requests", draft-ietf-httpbis-p4-conditional-0<span class="insert">4</span> (work in</td><td class="lineno" valign="top"></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="lblock">              progress), <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              progress), <span class="insert">August</span> 2008.</td><td class="lineno" valign="top"></td></tr>
200      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
201      <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>
202      <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>
203      <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>
204      <tr><td><a name="diff0012" /></td></tr>
205      <tr><td class="lineno" valign="top"></td><td class="lblock">              Partial Responses", draft-ietf-httpbis-p5-range-0<span class="delete">3</span> (work</td><td> </td><td class="rblock">              Partial Responses", draft-ietf-httpbis-p5-range-0<span class="insert">4</span> (work</td><td class="lineno" valign="top"></td></tr>
206      <tr><td class="lineno" valign="top"></td><td class="lblock">              in progress), <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              in progress), <span class="insert">August</span> 2008.</td><td class="lineno" valign="top"></td></tr>
207      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
208      <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>
209      <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>
210      <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>
211      <tr><td><a name="diff0013" /></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="lblock">              draft-ietf-httpbis-p7-auth-0<span class="delete">3</span> (work in progress),</td><td> </td><td class="rblock">              draft-ietf-httpbis-p7-auth-0<span class="insert">4</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">June</span> 2008.</td><td> </td><td class="rblock">              <span class="insert">August</span> 2008.</td><td class="lineno" valign="top"></td></tr>
214      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
215      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2047]  Moore, K., "MIME (Multipurpose Internet Mail Extensions)</td><td> </td><td class="right">   [RFC2047]  Moore, K., "MIME (Multipurpose Internet Mail Extensions)</td><td class="lineno" valign="top"></td></tr>
216      <tr><td class="lineno" valign="top"></td><td class="left">              Part Three: Message Header Extensions for Non-ASCII Text",</td><td> </td><td class="right">              Part Three: Message Header Extensions for Non-ASCII Text",</td><td class="lineno" valign="top"></td></tr>
217      <tr><td class="lineno" valign="top"></td><td class="left">              RFC 2047, November 1996.</td><td> </td><td class="right">              RFC 2047, November 1996.</td><td class="lineno" valign="top"></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">   [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>
220      <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>
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">20.2.  Informative References</td><td> </td><td class="right">20.2.  Informative References</td><td class="lineno" valign="top"></td></tr>
223      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
225      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 46, line 39</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 46, line 39</em></th><td></td></tr>
226      <tr><td class="lineno" valign="top"></td><td class="left">      other parts of the specification.</td><td> </td><td class="right">      other parts of the specification.</td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
228      <tr><td class="lineno" valign="top"></td><td class="left">B.4.  Since draft-ietf-httpbis-p6-cache-02</td><td> </td><td class="right">B.4.  Since draft-ietf-httpbis-p6-cache-02</td><td class="lineno" valign="top"></td></tr>
229      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
230      <tr><td class="lineno" valign="top"></td><td class="left">   Ongoing work on IANA Message Header Registration</td><td> </td><td class="right">   Ongoing work on IANA Message Header Registration</td><td class="lineno" valign="top"></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="left">   (&lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/40&gt;):</td><td> </td><td class="right">   (&lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/40&gt;):</td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
233      <tr><td class="lineno" valign="top"></td><td class="left">   o  Reference RFC 3984, and update header registrations for headers</td><td> </td><td class="right">   o  Reference RFC 3984, and update header registrations for headers</td><td class="lineno" valign="top"></td></tr>
234      <tr><td class="lineno" valign="top"></td><td class="left">      defined in this document.</td><td> </td><td class="right">      defined in this document.</td><td class="lineno" valign="top"></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
236      <tr><td><a name="diff0014" /></td></tr>
237      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">B.5.  Since draft-ietf-httpbis-p6-cache-03</span></td><td class="lineno" valign="top"></td></tr>
238      <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>
239      <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>
240      <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>
241      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://www3.tools.ietf.org/wg/httpbis/trac/ticket/106&gt;: "Vary</span></td><td class="lineno" valign="top"></td></tr>
242      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      header classification"</span></td><td class="lineno" valign="top"></td></tr>
243      <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>
244      <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>
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">   A</td><td> </td><td class="right">   A</td><td class="lineno" valign="top"></td></tr>
247      <tr><td class="lineno" valign="top"></td><td class="left">      age  7</td><td> </td><td class="right">      age  7</td><td class="lineno" valign="top"></td></tr>
248      <tr><td class="lineno" valign="top"></td><td class="left">      Age header  27</td><td> </td><td class="right">      Age header  27</td><td class="lineno" valign="top"></td></tr>
249      <tr><td><a name="diff0015" /></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">                                                                         </span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
251      <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>
252      <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>
253      <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>
254      <tr><td class="lineno" valign="top"></td><td class="left">         max-age  32-33</td><td> </td><td class="right">         max-age  32-33</td><td class="lineno" valign="top"></td></tr>
255      <tr><td class="lineno" valign="top"></td><td class="left">         max-stale  32</td><td> </td><td class="right">         max-stale  32</td><td class="lineno" valign="top"></td></tr>
256      <tr><td class="lineno" valign="top"></td><td class="left">         min-fresh  32</td><td> </td><td class="right">         min-fresh  32</td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="left">         must-revalidate  34</td><td> </td><td class="right">         must-revalidate  34</td><td class="lineno" valign="top"></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="left">         no-cache  29</td><td> </td><td class="right">         no-cache  29</td><td class="lineno" valign="top"></td></tr>
259      <tr><td class="lineno" valign="top"></td><td class="left">         no-store  30</td><td> </td><td class="right">         no-store  30</td><td class="lineno" valign="top"></td></tr>
260      <tr><td class="lineno" valign="top"></td><td class="left">         no-transform  35</td><td> </td><td class="right">         no-transform  35</td><td class="lineno" valign="top"></td></tr>
261
262     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
263     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 15 change blocks.&nbsp;</a></th></tr>
264     <tr class="stats"><td></td><th><i>26 lines changed or deleted</i></th><th><i> </i></th><th><i>35 lines changed or added</i></th><td></td></tr>
265     <tr><td colspan="5" align="center" class="small"><br/>This html diff was produced by rfcdiff 1.34. The latest version is available from <a href="http://www.tools.ietf.org/tools/rfcdiff/" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>
266   </table>
267   </body>
268   </html>
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