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Better wording and attempt to prepare revision notes

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Mickael Remond 2015-09-22 22:47:20 +02:00 committed by Sam Whited
parent ea1f090ed3
commit df0f08bf1d
1 changed files with 29 additions and 12 deletions
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xep-0033.xml
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@ -26,6 +26,13 @@
&hildjj;
&stpeter;
<revision>
<version>1.2</version>
<date>2015-09-22</date>
<initials>mre</initials>
<remark>Clarification: Multicast service MUST track directed presence broadcast to later ensure broadcast of subsequent unvailable presence to the same receiving parties.</remark>
</revision>
<revision>
<version>1.1</version>
<date>2004-09-15</date>
@ -287,18 +294,28 @@
<section1 topic='Business Rules' anchor='rules'>
<section2 topic='Directed Presence' anchor='presence'>
<p>The multicast service MUST keep track of the entities it
sent a presence with an absent 'type' attribute (i.e. an
'available' presence) to and the originating entity of that
presence. If the multicast service receives an unavailable
presence from one of the tracked originating entities, it MUST
broadcast this presence to all tracked entities which have not
yet received an unavailable presence from the originating
entity, even if the presence does not contain explicit
broadcast addresses. Thus the multicast service ensures that
all entities, which have received an (directed) 'available'
presence over it, receive the related 'unavailable'
presence.</p>
<p>This specification can be used to, in effect, send directed
presence (see Section 4.6 of &rfc6121;). In order to ensure
that entities that have received directed available presence
through the service also are informed when the originating
entity sends unavailable presence, the multicast service MUST
do the following:</p>
<ol>
<li>Keep track of the entities to which it sends available
presence (i.e., presence stanzas with no 'type' attribute)
along with the originating entity of that presence.</li>
<li>Upon receiving a presence stanza of type "unavailable"
from an originating entity, broadcast that unavailable
presence to all entities to which it has send available
presence.</li>
</ol>
<p>In this way, the multicast service ensures that all
entities which have received available presence through the
service also receive the associated unavailable presence.</p>
</section2>
</section1>