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slight clarification 

git-svn-id: file:///home/ksmith/gitmigration/svn/xmpp/trunk@2636 4b5297f7-1745-476d-ba37-a9c6900126ab
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Peter Saint-Andre 2009-01-14 20:56:00 +00:00
parent 493a28a3ce
commit 9ce6ceb993
1 changed files with 1 additions and 1 deletions
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xep-0115.xml
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@ -556,7 +556,7 @@
<p>If two entities exchange messages but they do not normally exchange presence (i.e., via presence subscription), the entities MAY choose to send directed presence to each other, where the presence information SHOULD be annotated with the same capabilities information as each entity sends in presence broadcasts. Until and unless capabilities information has been received from another entity, an application MUST assume that the other entity does not support capabilities.</p>
</section2>
<section2 topic='Caps Optimization' anchor='impl-optimize'>
<p>A server that is managing an connected client's presence session MAY optimize presence notification traffic sent through the server by stripping off redundant capabilities annotations. Because of this, receivers of presence notifications MUST NOT expect an annotation on every presence notification they receive. If the server performs caps optimization, it MUST ensure that the first presence notification each subscriber receives contains the annotation. The server MUST also ensure that any changes in the caps information (e.g., an updated 'ver' attribute) are sent to all subscribers.</p>
<p>A server that is managing an connected client's presence session MAY optimize presence notification traffic sent through the server by stripping off redundant capabilities annotations (i.e., the &lt;c/&gt; element). Because of this, receivers of presence notifications MUST NOT expect an annotation on every presence notification they receive. If the server performs caps optimization, it MUST ensure that the first presence notification each subscriber receives contains the annotation. The server MUST also ensure that any changes in the caps information (e.g., an updated 'ver' attribute) are sent to all subscribers.</p>
<p>If a connected client determines that its server supports caps optimization, it MAY choose to send the capabilities annotation only on the first presence packet, as well as whenever its capabilities change.</p>
</section2>
</section1>