source: draft-ietf-httpbis/diffs/draft-ietf-httpbis-p4-conditional-25-from-24.diff.html @ 2650

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38  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p4-conditional-24.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p4-conditional-25.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. Reschke, Ed.</td><td> </td><td class="right">Obsoletes: 2616 (if approved)                            J. Reschke, Ed.</td><td class="lineno" valign="top"></td></tr>
43      <tr><td class="lineno" valign="top"></td><td class="left">Intended status: Standards Track                              greenbytes</td><td> </td><td class="right">Intended status: Standards Track                              greenbytes</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: Ma<span class="delete">rch 29, 2014                               September 25</span>, 2013</td><td> </td><td class="rblock">Expires: Ma<span class="insert">y 21, 2014                                  November 17</span>, 2013</td><td class="lineno" valign="top"></td></tr>
46      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
47      <tr><td class="lineno" valign="top"></td><td class="left">      Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests</td><td> </td><td class="right">      Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests</td><td class="lineno" valign="top"></td></tr>
48      <tr><td><a name="diff0002" /></td></tr>
49      <tr><td class="lineno" valign="top"></td><td class="lblock">                  draft-ietf-httpbis-p4-conditional-2<span class="delete">4</span></td><td> </td><td class="rblock">                  draft-ietf-httpbis-p4-conditional-2<span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
50      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
51      <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>
52      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
53      <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>
54      <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>
55      <tr><td class="lineno" valign="top"></td><td class="left">   systems.  This document defines HTTP/1.1 conditional requests,</td><td> </td><td class="right">   systems.  This document defines HTTP/1.1 conditional requests,</td><td class="lineno" valign="top"></td></tr>
56      <tr><td class="lineno" valign="top"></td><td class="left">   including metadata header fields for indicating state changes,</td><td> </td><td class="right">   including metadata header fields for indicating state changes,</td><td class="lineno" valign="top"></td></tr>
57      <tr><td class="lineno" valign="top"></td><td class="left">   request header fields for making preconditions on such state, and</td><td> </td><td class="right">   request header fields for making preconditions on such state, and</td><td class="lineno" valign="top"></td></tr>
58      <tr><td class="lineno" valign="top"></td><td class="left">   rules for constructing the responses to a conditional request when</td><td> </td><td class="right">   rules for constructing the responses to a conditional request when</td><td class="lineno" valign="top"></td></tr>
59      <tr><td class="lineno" valign="top"></td><td class="left">   one or more preconditions evaluate to false.</td><td> </td><td class="right">   one or more preconditions evaluate to false.</td><td class="lineno" valign="top"></td></tr>
60      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
61      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 1, line 33</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 1, line 33</em></th><td></td></tr>
62      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
63      <tr><td class="lineno" valign="top"></td><td class="left">   Discussion of this draft takes place on the HTTPBIS working group</td><td> </td><td class="right">   Discussion of this draft takes place on the HTTPBIS working group</td><td class="lineno" valign="top"></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="left">   mailing list (ietf-http-wg@w3.org), which is archived at</td><td> </td><td class="right">   mailing list (ietf-http-wg@w3.org), which is archived at</td><td class="lineno" valign="top"></td></tr>
65      <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>
66      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
67      <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>
68      <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>
69      <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>
70      <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>
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><a name="diff0003" /></td></tr>
73      <tr><td class="lineno" valign="top"></td><td class="lblock">   The changes in this draft are summarized in Appendix D.<span class="delete">5</span>.</td><td> </td><td class="rblock">   The changes in this draft are summarized in Appendix D.<span class="insert">1</span>.</td><td class="lineno" valign="top"></td></tr>
74      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
75      <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>
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">   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>
78      <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>
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">   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>
81      <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>
82      <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>
83      <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>
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">   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>
86      <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>
87      <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>
88      <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>
89      <tr><td><a name="diff0004" /></td></tr>
90      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on Ma<span class="delete">rch 29</span>, 2014.</td><td> </td><td class="rblock">   This Internet-Draft will expire on Ma<span class="insert">y 21</span>, 2014.</td><td class="lineno" valign="top"></td></tr>
91      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
92      <tr><td class="lineno" valign="top"></td><td class="left">Copyright Notice</td><td> </td><td class="right">Copyright Notice</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">   Copyright (c) 2013 IETF Trust and the persons identified as the</td><td> </td><td class="right">   Copyright (c) 2013 IETF Trust and the persons identified as the</td><td class="lineno" valign="top"></td></tr>
95      <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>
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">   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>
98      <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>
99      <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>
100      <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>
101      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
102      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 3, line 16</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 3, line 16</em></th><td></td></tr>
103      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
104      <tr><td class="lineno" valign="top"></td><td class="left">   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
105      <tr><td class="lineno" valign="top"></td><td class="left">     1.1.  Conformance and Error Handling . . . . . . . . . . . . . .  4</td><td> </td><td class="right">     1.1.  Conformance and Error Handling . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
106      <tr><td class="lineno" valign="top"></td><td class="left">     1.2.  Syntax Notation  . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">     1.2.  Syntax Notation  . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
107      <tr><td class="lineno" valign="top"></td><td class="left">   2.  Validators . . . . . . . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">   2.  Validators . . . . . . . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
108      <tr><td class="lineno" valign="top"></td><td class="left">     2.1.  Weak versus Strong . . . . . . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">     2.1.  Weak versus Strong . . . . . . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
109      <tr><td class="lineno" valign="top"></td><td class="left">     2.2.  Last-Modified  . . . . . . . . . . . . . . . . . . . . . .  7</td><td> </td><td class="right">     2.2.  Last-Modified  . . . . . . . . . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
110      <tr><td class="lineno" valign="top"></td><td class="left">       2.2.1.  Generation . . . . . . . . . . . . . . . . . . . . . .  7</td><td> </td><td class="right">       2.2.1.  Generation . . . . . . . . . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
111      <tr><td class="lineno" valign="top"></td><td class="left">       2.2.2.  Comparison . . . . . . . . . . . . . . . . . . . . . .  8</td><td> </td><td class="right">       2.2.2.  Comparison . . . . . . . . . . . . . . . . . . . . . .  8</td><td class="lineno" valign="top"></td></tr>
112      <tr><td class="lineno" valign="top"></td><td class="left">     2.3.  ETag . . . . . . . . . . . . . . . . . . . . . . . . . . .  9</td><td> </td><td class="right">     2.3.  ETag . . . . . . . . . . . . . . . . . . . . . . . . . . .  9</td><td class="lineno" valign="top"></td></tr>
113      <tr><td><a name="diff0005" /></td></tr>
114      <tr><td class="lineno" valign="top"></td><td class="lblock">       2.3.1.  Generation . . . . . . . . . . . . . . . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock">       2.3.1.  Generation . . . . . . . . . . . . . . . . . . . . . . <span class="insert"> 9</span></td><td class="lineno" valign="top"></td></tr>
115      <tr><td class="lineno" valign="top"></td><td class="left">       2.3.2.  Comparison . . . . . . . . . . . . . . . . . . . . . . 10</td><td> </td><td class="right">       2.3.2.  Comparison . . . . . . . . . . . . . . . . . . . . . . 10</td><td class="lineno" valign="top"></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="left">       2.3.3.  Example: Entity-tags Varying on Content-Negotiated</td><td> </td><td class="right">       2.3.3.  Example: Entity-tags Varying on Content-Negotiated</td><td class="lineno" valign="top"></td></tr>
117      <tr><td class="lineno" valign="top"></td><td class="left">               Resources  . . . . . . . . . . . . . . . . . . . . . . 11</td><td> </td><td class="right">               Resources  . . . . . . . . . . . . . . . . . . . . . . 11</td><td class="lineno" valign="top"></td></tr>
118      <tr><td class="lineno" valign="top"></td><td class="left">     2.4.  When to Use Entity-tags and Last-Modified Dates  . . . . . 12</td><td> </td><td class="right">     2.4.  When to Use Entity-tags and Last-Modified Dates  . . . . . 12</td><td class="lineno" valign="top"></td></tr>
119      <tr><td class="lineno" valign="top"></td><td class="left">   3.  Precondition Header Fields . . . . . . . . . . . . . . . . . . 13</td><td> </td><td class="right">   3.  Precondition Header Fields . . . . . . . . . . . . . . . . . . 13</td><td class="lineno" valign="top"></td></tr>
120      <tr><td class="lineno" valign="top"></td><td class="left">     3.1.  If-Match . . . . . . . . . . . . . . . . . . . . . . . . . 13</td><td> </td><td class="right">     3.1.  If-Match . . . . . . . . . . . . . . . . . . . . . . . . . 13</td><td class="lineno" valign="top"></td></tr>
121      <tr><td class="lineno" valign="top"></td><td class="left">     3.2.  If-None-Match  . . . . . . . . . . . . . . . . . . . . . . 14</td><td> </td><td class="right">     3.2.  If-None-Match  . . . . . . . . . . . . . . . . . . . . . . 14</td><td class="lineno" valign="top"></td></tr>
122      <tr><td class="lineno" valign="top"></td><td class="left">     3.3.  If-Modified-Since  . . . . . . . . . . . . . . . . . . . . 15</td><td> </td><td class="right">     3.3.  If-Modified-Since  . . . . . . . . . . . . . . . . . . . . 15</td><td class="lineno" valign="top"></td></tr>
123      <tr><td class="lineno" valign="top"></td><td class="left">     3.4.  If-Unmodified-Since  . . . . . . . . . . . . . . . . . . . 16</td><td> </td><td class="right">     3.4.  If-Unmodified-Since  . . . . . . . . . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
124      <tr><td class="lineno" valign="top"></td><td class="left">     3.5.  If-Range . . . . . . . . . . . . . . . . . . . . . . . . . 18</td><td> </td><td class="right">     3.5.  If-Range . . . . . . . . . . . . . . . . . . . . . . . . . 18</td><td class="lineno" valign="top"></td></tr>
125      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
126      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 3, line 45</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 3, line 45</em></th><td></td></tr>
127      <tr><td class="lineno" valign="top"></td><td class="left">   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 22</td><td> </td><td class="right">   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 22</td><td class="lineno" valign="top"></td></tr>
128      <tr><td class="lineno" valign="top"></td><td class="left">   9.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 22</td><td> </td><td class="right">   9.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 22</td><td class="lineno" valign="top"></td></tr>
129      <tr><td class="lineno" valign="top"></td><td class="left">   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23</td><td> </td><td class="right">   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23</td><td class="lineno" valign="top"></td></tr>
130      <tr><td class="lineno" valign="top"></td><td class="left">     10.1. Normative References . . . . . . . . . . . . . . . . . . . 23</td><td> </td><td class="right">     10.1. Normative References . . . . . . . . . . . . . . . . . . . 23</td><td class="lineno" valign="top"></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="left">     10.2. Informative References . . . . . . . . . . . . . . . . . . 23</td><td> </td><td class="right">     10.2. Informative References . . . . . . . . . . . . . . . . . . 23</td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix A.  Changes from RFC 2616 . . . . . . . . . . . . . . . . 23</td><td> </td><td class="right">   Appendix A.  Changes from RFC 2616 . . . . . . . . . . . . . . . . 23</td><td class="lineno" valign="top"></td></tr>
133      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix B.  Imported ABNF . . . . . . . . . . . . . . . . . . . . 24</td><td> </td><td class="right">   Appendix B.  Imported ABNF . . . . . . . . . . . . . . . . . . . . 24</td><td class="lineno" valign="top"></td></tr>
134      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix C.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 24</td><td> </td><td class="right">   Appendix C.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 24</td><td class="lineno" valign="top"></td></tr>
135      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix D.  Change Log (to be removed by RFC Editor before</td><td> </td><td class="right">   Appendix D.  Change Log (to be removed by RFC Editor before</td><td class="lineno" valign="top"></td></tr>
136      <tr><td class="lineno" valign="top"></td><td class="left">                publication)  . . . . . . . . . . . . . . . . . . . . 25</td><td> </td><td class="right">                publication)  . . . . . . . . . . . . . . . . . . . . 25</td><td class="lineno" valign="top"></td></tr>
137      <tr><td><a name="diff0006" /></td></tr>
138      <tr><td class="lineno" valign="top"></td><td class="lblock">     D.1.  Since <span class="delete">draft-ietf-httpbis-p4-conditional-19</span> . . . . . . . . 25</td><td> </td><td class="rblock">     D.1.  Since <span class="insert">draft-ietf-httpbis-p4-conditional-24</span> . . . . . . . . 25</td><td class="lineno" valign="top"></td></tr>
139      <tr><td class="lineno" valign="top"></td><td class="lblock">     <span class="delete">D.2.  Since draft-ietf-httpbis-p4-conditional-20 . . . . . . . . 26</span></td><td> </td><td class="rblock">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">25</span></td><td class="lineno" valign="top"></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     D.3.  Since draft-ietf-httpbis-p4-conditional-21 . . . . . . . . 26</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     D.4.  Since draft-ietf-httpbis-p4-conditional-22 . . . . . . . . 26</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
142      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     D.5.  Since draft-ietf-httpbis-p4-conditional-23 . . . . . . . . 27</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="lblock">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">27</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
145      <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>
146      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="left">   Conditional requests are HTTP requests [Part2] that include one or</td><td> </td><td class="right">   Conditional requests are HTTP requests [Part2] that include one or</td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno" valign="top"></td><td class="left">   more header fields indicating a precondition to be tested before</td><td> </td><td class="right">   more header fields indicating a precondition to be tested before</td><td class="lineno" valign="top"></td></tr>
149      <tr><td class="lineno" valign="top"></td><td class="left">   applying the method semantics to the target resource.  This document</td><td> </td><td class="right">   applying the method semantics to the target resource.  This document</td><td class="lineno" valign="top"></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="left">   defines the HTTP/1.1 conditional request mechanisms in terms of the</td><td> </td><td class="right">   defines the HTTP/1.1 conditional request mechanisms in terms of the</td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="left">   architecture, syntax notation, and conformance criteria defined in</td><td> </td><td class="right">   architecture, syntax notation, and conformance criteria defined in</td><td class="lineno" valign="top"></td></tr>
152      <tr><td class="lineno" valign="top"></td><td class="left">   [Part1].</td><td> </td><td class="right">   [Part1].</td><td class="lineno" valign="top"></td></tr>
153      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
154      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
155      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 5, line 30</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 5, line 30</em></th><td></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="left">   validators are ideal for comparisons but can be very difficult (and</td><td> </td><td class="right">   validators are ideal for comparisons but can be very difficult (and</td><td class="lineno" valign="top"></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="left">   occasionally impossible) to generate efficiently.  Rather than impose</td><td> </td><td class="right">   occasionally impossible) to generate efficiently.  Rather than impose</td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="left">   that all forms of resource adhere to the same strength of validator,</td><td> </td><td class="right">   that all forms of resource adhere to the same strength of validator,</td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP exposes the type of validator in use and imposes restrictions on</td><td> </td><td class="right">   HTTP exposes the type of validator in use and imposes restrictions on</td><td class="lineno" valign="top"></td></tr>
160      <tr><td class="lineno" valign="top"></td><td class="left">   when weak validators can be used as preconditions.</td><td> </td><td class="right">   when weak validators can be used as preconditions.</td><td class="lineno" valign="top"></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="left">   A "strong validator" is representation metadata that changes value</td><td> </td><td class="right">   A "strong validator" is representation metadata that changes value</td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="left">   whenever a change occurs to the representation data that would be</td><td> </td><td class="right">   whenever a change occurs to the representation data that would be</td><td class="lineno" valign="top"></td></tr>
164      <tr><td class="lineno" valign="top"></td><td class="left">   observable in the payload body of a 200 (OK) response to GET.</td><td> </td><td class="right">   observable in the payload body of a 200 (OK) response to GET.</td><td class="lineno" valign="top"></td></tr>
165      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
166      <tr><td><a name="diff0007" /></td></tr>
167      <tr><td class="lineno" valign="top"></td><td class="lblock">   A strong validator might change for other <span class="delete">reasons,</span> such as when a</td><td> </td><td class="rblock">   A strong validator might change for <span class="insert">reasons</span> other <span class="insert">than a change to</span></td><td class="lineno" valign="top"></td></tr>
168      <tr><td class="lineno" valign="top"></td><td class="lblock">   semantically significant part of the representation metadata is</td><td> </td><td class="rblock"><span class="insert">   the representation data,</span> such as when a semantically significant part</td><td class="lineno" valign="top"></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="lblock">   changed (e.g., Content-Type), but it is in the best interests of the</td><td> </td><td class="rblock">   of the representation metadata is changed (e.g., Content-Type), but</td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="lblock">   origin server to only change the value when it is necessary to</td><td> </td><td class="rblock">   it is in the best interests of the origin server to only change the</td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="lblock">   invalidate the stored responses held by remote caches and authoring</td><td> </td><td class="rblock">   value when it is necessary to invalidate the stored responses held by</td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="lblock">   tools.  <span class="delete">A strong validator is unique across all representations of a</span></td><td> </td><td class="rblock">   remote caches and authoring tools.</td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   given resource, such that no two representations of that resource can</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
174      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   share the same validator unless their representation data is</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   identical.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
176      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
177      <tr><td class="lineno" valign="top"></td><td class="left">   Cache entries might persist for arbitrarily long periods, regardless</td><td> </td><td class="right">   Cache entries might persist for arbitrarily long periods, regardless</td><td class="lineno" valign="top"></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="left">   of expiration times.  Thus, a cache might attempt to validate an</td><td> </td><td class="right">   of expiration times.  Thus, a cache might attempt to validate an</td><td class="lineno" valign="top"></td></tr>
179      <tr><td class="lineno" valign="top"></td><td class="left">   entry using a validator that it obtained in the distant past.  A</td><td> </td><td class="right">   entry using a validator that it obtained in the distant past.  A</td><td class="lineno" valign="top"></td></tr>
180      <tr><td class="lineno" valign="top"></td><td class="left">   strong validator is unique across all versions of all representations</td><td> </td><td class="right">   strong validator is unique across all versions of all representations</td><td class="lineno" valign="top"></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="left">   associated with a particular resource over time.  However, there is</td><td> </td><td class="right">   associated with a particular resource over time.  However, there is</td><td class="lineno" valign="top"></td></tr>
182      <tr><td class="lineno" valign="top"></td><td class="left">   no implication of uniqueness across representations of different</td><td> </td><td class="right">   no implication of uniqueness across representations of different</td><td class="lineno" valign="top"></td></tr>
183      <tr><td class="lineno" valign="top"></td><td class="left">   resources (i.e., the same strong validator might be in use for</td><td> </td><td class="right">   resources (i.e., the same strong validator might be in use for</td><td class="lineno" valign="top"></td></tr>
184      <tr><td class="lineno" valign="top"></td><td class="left">   representations of multiple resources at the same time and does not</td><td> </td><td class="right">   representations of multiple resources at the same time and does not</td><td class="lineno" valign="top"></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="left">   imply that those representations are equivalent).</td><td> </td><td class="right">   imply that those representations are equivalent).</td><td class="lineno" valign="top"></td></tr>
186      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
187      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 12, line 5</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 12, line 5</em></th><td></td></tr>
188      <tr><td class="lineno" valign="top"></td><td class="left">     HTTP/1.1 200 OK</td><td> </td><td class="right">     HTTP/1.1 200 OK</td><td class="lineno" valign="top"></td></tr>
189      <tr><td class="lineno" valign="top"></td><td class="left">     Date: Fri, 26 Mar 2010 00:05:00 GMT</td><td> </td><td class="right">     Date: Fri, 26 Mar 2010 00:05:00 GMT</td><td class="lineno" valign="top"></td></tr>
190      <tr><td class="lineno" valign="top"></td><td class="left">     ETag: "123-b"</td><td> </td><td class="right">     ETag: "123-b"</td><td class="lineno" valign="top"></td></tr>
191      <tr><td class="lineno" valign="top"></td><td class="left">     Content-Length: 43</td><td> </td><td class="right">     Content-Length: 43</td><td class="lineno" valign="top"></td></tr>
192      <tr><td class="lineno" valign="top"></td><td class="left">     Vary: Accept-Encoding</td><td> </td><td class="right">     Vary: Accept-Encoding</td><td class="lineno" valign="top"></td></tr>
193      <tr><td class="lineno" valign="top"></td><td class="left">     Content-Type: text/plain</td><td> </td><td class="right">     Content-Type: text/plain</td><td class="lineno" valign="top"></td></tr>
194      <tr><td class="lineno" valign="top"></td><td class="left">     Content-Encoding: gzip</td><td> </td><td class="right">     Content-Encoding: gzip</td><td class="lineno" valign="top"></td></tr>
195      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
196      <tr><td class="lineno" valign="top"></td><td class="left">     ...binary data...</td><td> </td><td class="right">     ...binary data...</td><td class="lineno" valign="top"></td></tr>
197      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
198      <tr><td><a name="diff0008" /></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="lblock">      Note: Content codings are a property of the <span class="delete">representation,</span> so</td><td> </td><td class="rblock">      Note: Content codings are a property of the <span class="insert">representation data,</span></td><td class="lineno" valign="top"></td></tr>
200      <tr><td class="lineno" valign="top"></td><td class="lblock">      <span class="delete">therefore an</span> entity-tag <span class="delete">of an encoded</span> representation has to be</td><td> </td><td class="rblock">      so <span class="insert">a strong</span> entity-tag <span class="insert">for a content-encoded</span> representation has to</td><td class="lineno" valign="top"></td></tr>
201      <tr><td class="lineno" valign="top"></td><td class="lblock">      distinct from an unencoded representation to prevent conflicts</td><td> </td><td class="rblock">      be distinct from <span class="insert">the entity tag of</span> an unencoded representation to</td><td class="lineno" valign="top"></td></tr>
202      <tr><td class="lineno" valign="top"></td><td class="lblock">      during cache updates and range requests.  In contrast, transfer</td><td> </td><td class="rblock">      prevent <span class="insert">potential</span> conflicts during cache updates and range</td><td class="lineno" valign="top"></td></tr>
203      <tr><td class="lineno" valign="top"></td><td class="lblock">      codings (Section 4 of [Part1]) apply only during message transfer</td><td> </td><td class="rblock">      requests.  In contrast, transfer codings (Section 4 of [Part1])</td><td class="lineno" valign="top"></td></tr>
204      <tr><td class="lineno" valign="top"></td><td class="lblock">      and do not <span class="delete">require</span> distinct entity-tags.</td><td> </td><td class="rblock">      apply only during message transfer and do not <span class="insert">result in</span> distinct</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">      entity-tags.</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">2.4.  When to Use Entity-tags and Last-Modified Dates</td><td> </td><td class="right">2.4.  When to Use Entity-tags and Last-Modified Dates</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">   We adopt a set of rules and recommendations for origin servers,</td><td> </td><td class="right">   We adopt a set of rules and recommendations for origin servers,</td><td class="lineno" valign="top"></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="left">   clients, and caches regarding when various validator types ought to</td><td> </td><td class="right">   clients, and caches regarding when various validator types ought to</td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="left">   be used, and for what purposes.</td><td> </td><td class="right">   be used, and for what purposes.</td><td class="lineno" valign="top"></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="left">   In 200 (OK) responses to GET or HEAD, an origin server:</td><td> </td><td class="right">   In 200 (OK) responses to GET or HEAD, an origin server:</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">   o  SHOULD send an entity-tag validator unless it is not feasible to</td><td> </td><td class="right">   o  SHOULD send an entity-tag validator unless it is not feasible to</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-l7" /><small>skipping to change at</small><em> page 23, line 8</em></th><th> </th><th><a name="part-r7" /><small>skipping to change at</small><em> page 23, line 8</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">9.  Acknowledgments</td><td> </td><td class="right">9.  Acknowledgments</td><td class="lineno" valign="top"></td></tr>
220      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
221      <tr><td class="lineno" valign="top"></td><td class="left">   See Section 10 of [Part1].</td><td> </td><td class="right">   See Section 10 of [Part1].</td><td class="lineno" valign="top"></td></tr>
222      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
223      <tr><td class="lineno" valign="top"></td><td class="left">10.  References</td><td> </td><td class="right">10.  References</td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno" valign="top"></td><td class="left">10.1.  Normative References</td><td> </td><td class="right">10.1.  Normative References</td><td class="lineno" valign="top"></td></tr>
225      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
226      <tr><td class="lineno" valign="top"></td><td class="left">   [Part1]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td> </td><td class="right">   [Part1]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left">              Protocol (HTTP/1.1): Message Syntax and Routing",</td><td> </td><td class="right">              Protocol (HTTP/1.1): Message Syntax and Routing",</td><td class="lineno" valign="top"></td></tr>
228      <tr><td><a name="diff0009" /></td></tr>
229      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p1-messaging-24</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p1-messaging-25</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
230      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">September</span> 2013.</td><td> </td><td class="rblock">              <span class="insert">November</span> 2013.</td><td class="lineno" valign="top"></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno" valign="top"></td><td class="left">   [Part2]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td> </td><td class="right">   [Part2]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td class="lineno" valign="top"></td></tr>
233      <tr><td class="lineno" valign="top"></td><td class="left">              Protocol (HTTP/1.1): Semantics and Content",</td><td> </td><td class="right">              Protocol (HTTP/1.1): Semantics and Content",</td><td class="lineno" valign="top"></td></tr>
234      <tr><td><a name="diff0010" /></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p2-semantics-24</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p2-semantics-25</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
236      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">September</span> 2013.</td><td> </td><td class="rblock">              <span class="insert">November</span> 2013.</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">   [Part5]    Fielding, R., Ed., Lafon, Y., Ed., and J. Reschke, Ed.,</td><td> </td><td class="right">   [Part5]    Fielding, R., Ed., Lafon, Y., Ed., and J. Reschke, Ed.,</td><td class="lineno" valign="top"></td></tr>
239      <tr><td class="lineno" valign="top"></td><td class="left">              "Hypertext Transfer Protocol (HTTP/1.1): Range Requests",</td><td> </td><td class="right">              "Hypertext Transfer Protocol (HTTP/1.1): Range Requests",</td><td class="lineno" valign="top"></td></tr>
240      <tr><td><a name="diff0011" /></td></tr>
241      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p5-range-24</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p5-range-25</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
242      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">September</span> 2013.</td><td> </td><td class="rblock">              <span class="insert">November</span> 2013.</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">   [Part6]    Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,</td><td> </td><td class="right">   [Part6]    Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,</td><td class="lineno" valign="top"></td></tr>
245      <tr><td class="lineno" valign="top"></td><td class="left">              Ed., "Hypertext Transfer Protocol (HTTP/1.1): Caching",</td><td> </td><td class="right">              Ed., "Hypertext Transfer Protocol (HTTP/1.1): Caching",</td><td class="lineno" valign="top"></td></tr>
246      <tr><td><a name="diff0012" /></td></tr>
247      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p6-cache-24</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p6-cache-25</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
248      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">September</span> 2013.</td><td> </td><td class="rblock">              <span class="insert">November</span> 2013.</td><td class="lineno" valign="top"></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="left">   [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>
251      <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>
252      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
253      <tr><td class="lineno" valign="top"></td><td class="left">   [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>
254      <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>
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">10.2.  Informative References</td><td> </td><td class="right">10.2.  Informative References</td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="left">   [BCP90]    Klyne, G., Nottingham, M., and J. Mogul, "Registration</td><td> </td><td class="right">   [BCP90]    Klyne, G., Nottingham, M., and J. Mogul, "Registration</td><td class="lineno" valign="top"></td></tr>
259      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
260      <tr bgcolor="gray" ><td></td><th><a name="part-l8" /><small>skipping to change at</small><em> page 25, line 31</em></th><th> </th><th><a name="part-r8" /><small>skipping to change at</small><em> page 25, line 31</em></th><td></td></tr>
261      <tr><td class="lineno" valign="top"></td><td class="left">   etagc = "!" / %x23-7E ; '#'-'~'</td><td> </td><td class="right">   etagc = "!" / %x23-7E ; '#'-'~'</td><td class="lineno" valign="top"></td></tr>
262      <tr><td class="lineno" valign="top"></td><td class="left">    / obs-text</td><td> </td><td class="right">    / obs-text</td><td class="lineno" valign="top"></td></tr>
263      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
264      <tr><td class="lineno" valign="top"></td><td class="left">   obs-text = &lt;obs-text, defined in [Part1], Section 3.2.6&gt;</td><td> </td><td class="right">   obs-text = &lt;obs-text, defined in [Part1], Section 3.2.6&gt;</td><td class="lineno" valign="top"></td></tr>
265      <tr><td class="lineno" valign="top"></td><td class="left">   opaque-tag = DQUOTE *etagc DQUOTE</td><td> </td><td class="right">   opaque-tag = DQUOTE *etagc DQUOTE</td><td class="lineno" valign="top"></td></tr>
266      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
267      <tr><td class="lineno" valign="top"></td><td class="left">   weak = %x57.2F ; W/</td><td> </td><td class="right">   weak = %x57.2F ; W/</td><td class="lineno" valign="top"></td></tr>
268      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
269      <tr><td class="lineno" valign="top"></td><td class="left">Appendix D.  Change Log (to be removed by RFC Editor before publication)</td><td> </td><td class="right">Appendix D.  Change Log (to be removed by RFC Editor before publication)</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><a name="diff0013" /></td></tr>
272      <tr><td class="lineno" valign="top"></td><td class="lblock">   Changes up to the <span class="delete">first Working Group</span> Last Call draft are summarized</td><td> </td><td class="rblock">   Changes up to the <span class="insert">IETF</span> Last Call draft are summarized in <span class="insert">&lt;http://</span></td><td class="lineno" valign="top"></td></tr>
273      <tr><td class="lineno" valign="top"></td><td class="lblock">   in <span class="delete">&lt;http://tools.ietf.org/html/</span></td><td> </td><td class="rblock"><span class="insert">   tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-24#appendix-D&gt;.</span></td><td class="lineno" valign="top"></td></tr>
274      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   draft-ietf-httpbis-p4-conditional-19#appendix-C&gt;.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
275      <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>
276      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">D.1.  Since draft-ietf-httpbis-p4-conditional-19</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
277      <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>
278      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Closed issues:</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
279      <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>
280      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/241&gt;: "Need to</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
281      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      clarify eval order/interaction of conditional headers"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
282      <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>
283      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/345&gt;: "Required</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      headers on 304 and 206"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
285      <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>
286      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/350&gt;: "Optionality</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
287      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      of Conditional Request Support"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
288      <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>
289      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/354&gt;: "ETags and</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
290      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      Conditional Requests"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
291      <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>
292      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/361&gt;: "ABNF</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
293      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      requirements for recipients"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
294      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"></span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
295      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/363&gt;: "Rare cases"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
296      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"></span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
297      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/365&gt;: "Conditional</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
298      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      Request Security Considerations"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
299      <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>
300      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/371&gt;: "If-Modified-</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
301      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      Since lacks definition for method != GET"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
302      <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>
303      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/372&gt;: "refactor</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
304      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      conditional header field descriptions"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
305      <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>
306      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">D.2.  Since draft-ietf-httpbis-p4-conditional-20</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
307      <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>
308      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  Conformance criteria and considerations regarding error handling</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
309      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      are now defined in Part 1.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
310      <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>
311      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">D.3.  Since draft-ietf-httpbis-p4-conditional-21</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
312      <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>
313      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Closed issues:</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"></span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
315      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/96&gt;: "Conditional</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
316      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      GET text"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
317      <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>
318      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/350&gt;: "Optionality</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      of Conditional Request Support"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
320      <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>
321      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/384&gt;: "unclear prose</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
322      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      in definition of 304"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
323      <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>
324      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/401&gt;: "ETags and</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
325      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      Conneg"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
326      <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>
327      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/402&gt;: "Comparison</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
328      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      function for If-Match and If-None-Match"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
329      <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>
330      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/406&gt;: "304 without</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
331      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      validator"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
332      <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>
333      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/427&gt;: "If-Match and</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
334      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      428"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
335      <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>
336      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">D.4.  Since draft-ietf-httpbis-p4-conditional-22</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
337      <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>
338      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Closed issues:</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
339      <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>
340      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/436&gt;: "explain list</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
341      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      expansion in ABNF appendices"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
342      <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>
343      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/437&gt;: "incorrect</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
344      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      example dates"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
345      <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>
346      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Partly resolved issues:</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
347      <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>
348      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/461&gt;: "Editorial</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
349      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      suggestions"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
350      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
351      <tr><td><a name="diff0014" /></td></tr>
352      <tr><td class="lineno" valign="top"></td><td class="lblock">D.<span class="delete">5.  Since draft-ietf-httpbis-p4-conditional-23</span></td><td> </td><td class="rblock">D.<span class="insert">1.  Since draft-ietf-httpbis-p4-conditional-24</span></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 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>
355      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
356      <tr><td><a name="diff0015" /></td></tr>
357      <tr><td class="lineno" valign="top"></td><td class="lblock">   o  <span class="delete">&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/455&gt;: "PUT + If-</span></td><td> </td><td class="rblock">   o  <span class="insert">&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/518&gt;: "APPSDIR</span></td><td class="lineno" valign="top"></td></tr>
358      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      Match over-constrained?"</span></td><td> </td><td class="rblock"><span class="insert">      review of draft-ietf-httpbis-p4-conditional-24"</span></td><td class="lineno" valign="top"></td></tr>
359      <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>
360      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/479&gt;: "MUSTs and</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
361      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      other feedback"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
362      <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>
363      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/495&gt;: "p4 editorial</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
364      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      nits"</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
365      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
366      <tr><td class="lineno" valign="top"></td><td class="left">Index</td><td> </td><td class="right">Index</td><td class="lineno" valign="top"></td></tr>
367      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
368      <tr><td class="lineno" valign="top"></td><td class="left">   3</td><td> </td><td class="right">   3</td><td class="lineno" valign="top"></td></tr>
369      <tr><td class="lineno" valign="top"></td><td class="left">      304 Not Modified (status code)  18</td><td> </td><td class="right">      304 Not Modified (status code)  18</td><td class="lineno" valign="top"></td></tr>
370      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
371      <tr><td class="lineno" valign="top"></td><td class="left">   4</td><td> </td><td class="right">   4</td><td class="lineno" valign="top"></td></tr>
372      <tr><td class="lineno" valign="top"></td><td class="left">      412 Precondition Failed (status code)  18</td><td> </td><td class="right">      412 Precondition Failed (status code)  18</td><td class="lineno" valign="top"></td></tr>
373      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
374      <tr><td class="lineno" valign="top"></td><td class="left">   E</td><td> </td><td class="right">   E</td><td class="lineno" valign="top"></td></tr>
375
376     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
377     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 15 change blocks.&nbsp;</a></th></tr>
378     <tr class="stats"><td></td><th><i>121 lines changed or deleted</i></th><th><i> </i></th><th><i>33 lines changed or added</i></th><td></td></tr>
379     <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>
380   </table>
381   </body>
382   </html>
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