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git-svn-id: file:///home/ksmith/gitmigration/svn/xmpp/trunk@410 4b5297f7-1745-476d-ba37-a9c6900126ab
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Peter Saint-Andre 2007-01-24 16:19:17 +00:00
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xep-0201.xml
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@ -62,13 +62,13 @@
</ul>
</section1>
<section1 topic='Semantics' anchor='semantics'>
<p>Section 2.1.2.3 of <cite>RFC 3920</cite> currently states the following regarding the semantics of the ThreadID:</p>
<p>Section 2.1.2.3 of <cite>RFC 3921</cite> currently states the following regarding the semantics of the ThreadID:</p>
<p class='indent'>The &lt;thread/&gt; element contains non-human-readable XML character data specifying an identifier that is used for tracking a conversation thread (sometimes referred to as an "instant messaging session") between two entities.</p>
<p>The description in <cite>RFC 3921</cite> is deemed to be too limiting, since it ignores the potential use of the ThreadID when exchanging message stanzas of types other than 'chat'. Therefore we proposal the following description:</p>
<p class='indent'>The primary use of the XMPP &lt;thread/&gt; element is to uniquely identify a conversation thread or "chat session" between two entities instantiated by &lt;message/&gt; stanzas of type 'chat'. However, the XMPP &lt;thread/&gt; element may also be used to uniquely identify an analogous thread between two entities instantiated by &lt;message/&gt; stanzas of type 'headline' or 'normal', or among multiple entities in the context of a multi-user chat room instantiated by &lt;message/&gt; stanzas of type 'groupchat'. It may also be used for &lt;message/&gt; stanzas not related to a conversation, such as a game session or between plugins.</p>
</section1>
<section1 topic='Uniqueness' anchor='unique'>
<p>Section 2.1.2.3 of <cite>RFC 3920</cite> currently states the following uniqueness requirement:</p>
<p>Section 2.1.2.3 of <cite>RFC 3921</cite> currently states the following uniqueness requirement:</p>
<p class='indent'>The value of the &lt;thread/&gt; element ... MUST be unique to that conversation thread within the stream and MUST be consistent throughout that conversation (a client that receives a message from the same full JID but with a different thread ID MUST assume that the message in question exists outside the context of the existing conversation thread).</p>
<p>The uniqueness requirement in <cite>RFC 3921</cite> is not deemed strong enough since it is desirable that a ThreadID could be used to (for instance) restart a conversation at a later date. Therefore we propose the following uniqueness requirement:</p>
<p class='indent'>The value of the &lt;thread/&gt; element MUST be a universally unique identifier (UUID) as described in &rfc4122;.</p>