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XEP-0280: feature for mandatory rules

This commit is contained in:
Georg Lukas 2019-04-24 07:38:52 +02:00
parent 2749b03c9f
commit bd18afe17d
1 changed files with 7 additions and 0 deletions
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xep-0280.xml
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@ -197,6 +197,7 @@
<query xmlns='http://jabber.org/protocol/disco#info'>
...
<feature var='urn:xmpp:carbons:2'/>
<feature var='urn:xmpp:carbons:rules:0'/>
...
</query>
</iq>]]></example>
@ -279,6 +280,7 @@
<p>The focus of this specification is instant messaging applications and so those (and only those) &MESSAGE; stanzas used for instant messaging SHOULD be delivered as Carbons.</p>
<p>The following is the set of rules that a server implementation SHOULD use to determine which messages should be carbon-copied. Future specifications MAY add or override rules, though they are generally advised to <link url='#avoiding'>use the &lt;private/&gt; element</link>.</p>
<section2 topic='Recommended Rules' anchor='recommended-rules'>
<p>A &MESSAGE; is eligible for carbons delivery if it does not contain a &lt;private/&gt; child element and if at least one the following is true:</p>
<ul>
<li>it is of type "chat".</li>
@ -299,6 +301,11 @@
<p>As the above is an implementation detail of servers, clients MUST NOT rely on the server implementing a particular set of rules for which messages are eligible for Carbons delivery.</p>
<p>Future specifications may have more precise requirements on which messages need to be eligible for carbons delivery; such future specifications will provide their own discovery and negotiation mechanisms, such that a client negotiating Carbons using the protocol defined in this specification will cause the server to consider messages eligible for Carbons delivery based on the requirements described herein.</p>
<p><strong>Note:</strong> previous versions of this specification limited eligible messages to those of type "chat" - however, this was generally found to be inadequate due to the proliferation of type "normal" messages used in instant messaging.</p>
</section2>
<section2 topic='Mandatory Support' anchor='mandatory-support'>
<p>A server implementation can choose to advertise full support of all the rules in §6.1 by including the "urn:xmpp:carbons:rules:0" feature in its service discovery information. If that feature is advertised, the rules above must be treated as REQUIRED and not merely as RECOMMENDED.</p>
<p>Accordingly, if this feature is advertised, a client MAY rely on the server supporting this exact set of rules.</p>
</section2>
</section1>
<section1 topic='Receiving Messages' anchor='inbound'>