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xeps/xep-0306.xml
stpeter 16bfbbc246 0.2
2011-12-14 17:08:09 -07:00

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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE xep SYSTEM 'xep.dtd' [
<!ENTITY % ents SYSTEM 'xep.ent'>
%ents;
]>
<?xml-stylesheet type='text/xsl' href='xep.xsl'?>
<xep>
<header>
<title>Extensible Status Conditions for Multi-User Chat</title>
<abstract>This document defines an extensible format for status conditions in Multi-User Chat, similar to the error format used in the core of XMPP.</abstract>
&LEGALNOTICE;
<number>0306</number>
<status>Experimental</status>
<type>Standards Track</type>
<sig>Standards</sig>
<dependencies>
<spec>RFC 6120</spec>
<spec>XEP-0045</spec>
</dependencies>
<supersedes/>
<supersededby/>
<shortname>N/A</shortname>
&stpeter;
<revision>
<version>0.2</version>
<date>2011-12-14</date>
<initials>psa</initials>
<remark><p>Modified format to make it more backward compatible; incremented protocol namespace.</p></remark>
</revision>
<revision>
<version>0.1</version>
<date>2011-08-26</date>
<initials>psa</initials>
<remark><p>Initial published version.</p></remark>
</revision>
<revision>
<version>0.0.1</version>
<date>2011-08-12</date>
<initials>psa</initials>
<remark><p>Rough draft.</p></remark>
</revision>
</header>
<section1 topic='Introduction' anchor='intro'>
<p>Traditionally, &xep0045; has used numerical status codes similar to those used in HTTP and SMTP. Numerical codes were deprecated in the core of XMPP by &rfc3920; and are no longer even defined in the core schemas provided in &rfc6120; (see also &xep0086;). In an effort to modernize the Multi-User Chat (MUC) protocol, this document defines an extensible format for status conditions in MUC.</p>
</section1>
<section1 topic='Format' anchor='format'>
<p>XML elements describing status conditions defined by this specification SHALL be qualified by the 'urn:xmpp:muc:conditions:1' namespace.</p>
<p>The structure is as follows:</p>
<code><![CDATA[
<status xmlns='http://jabber.org/protocol/muc#user'>
<DEFINED-CONDITION>
[<text xml:lang='langcode'>OPTIONAL descriptive text</text>]
[OPTIONAL application-specific condition element]
</DEFINED-CONDITION>
[<DEFINED-CONDITION/>]
[OPTIONAL application-specific condition element or elements]
</status>
]]></code>
<p>That is, any &lt;status/&gt; element qualified by the existing http://jabber.org/protocol/muc#user' namespace (from XEP-0045) MAY contain one or more condition elements defined in this document (each of which MAY contain a human-readable &lt;text/&gt; element and MAY contain an application-specific condition element) and MAY contain one or more application-specific condition elements.</p>
<p>An example follows.</p>
<example caption="Service Sends New Occupant's Presence to New Occupant"><![CDATA[
<presence
from='coven@chat.shakespeare.lit/thirdwitch'
id='n13mt3l'
to='hag66@shakespeare.lit/pda'>
<x xmlns='http://jabber.org/protocol/muc#user'>
<item affiliation='member' role='participant'/>
<status code='100'/>
<realjid-public xmlns='urn:xmpp:muc:conditions:1'/>
</status>
<status code='110'/>
<self-presence xmlns='urn:xmpp:muc:conditions:1'/>
</status>
</x>
</presence>
]]></example>
</section1>
<section1 topic='Mapping of Existing Codes' anchor='mapping'>
<p>The following table maps the existing numerical status codes (registered with the &REGISTRAR; at &MUCSTATUS;) to XML elements.</p>
<table caption='Error Codes for http://jabber.org/protocol/muc#user Namespace'>
<tr>
<th>Code</th>
<th>Element</th>
</tr>
<tr>
<td>100</td>
<td>&lt;realjid-public/&gt;</td>
</tr>
<tr>
<td>101</td>
<td>&lt;affiliation-changed/&gt;</td>
</tr>
<tr>
<td>102</td>
<td>&lt;unavailable-shown/&gt;</td>
</tr>
<tr>
<td>103</td>
<td>&lt;unavailable-not-shown/&gt;</td>
</tr>
<tr>
<td>104</td>
<td>&lt;configuration-changed/&gt;</td>
</tr>
<tr>
<td>110</td>
<td>&lt;self-presence/&gt;</td>
</tr>
<tr>
<td>170</td>
<td>&lt;logging-enabled/&gt;</td>
</tr>
<tr>
<td>171</td>
<td>&lt;logging-disabled/&gt;</td>
</tr>
<tr>
<td>172</td>
<td>&lt;non-anonymous/&gt;</td>
</tr>
<tr>
<td>173</td>
<td>&lt;semi-anonymous/&gt;</td>
</tr>
<tr>
<td>174</td>
<td>&lt;fully-anonymous/&gt;</td>
</tr>
<tr>
<td>201</td>
<td>&lt;room-created/&gt;</td>
</tr>
<tr>
<td>210</td>
<td>&lt;nick-assigned/&gt;</td>
</tr>
<tr>
<td>301</td>
<td>&lt;banned/&gt;</td>
</tr>
<tr>
<td>303</td>
<td>&lt;new-nick/&gt;</td>
</tr>
<tr>
<td>307</td>
<td>&lt;kicked/&gt;</td>
</tr>
<tr>
<td>321</td>
<td>&lt;removed-affiliation/&gt;</td>
</tr>
<tr>
<td>322</td>
<td>&lt;removed-membership/&gt;</td>
</tr>
<tr>
<td>332</td>
<td>&lt;removed-shutdown/&gt;</td>
</tr>
</table>
</section1>
<section1 topic='Security Considerations' anchor='security'>
<p>The security considerations of <cite>XEP-0045</cite> apply.</p>
</section1>
<section1 topic='IANA Considerations' anchor='iana'>
<p>This document requires no interaction with &IANA;.</p>
</section1>
<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
<section2 topic='Protocol Namespaces' anchor='registrar-ns'>
<p>This specification defines the following XML namespace:</p>
<ul>
<li>urn:xmpp:muc:conditions:1</li>
</ul>
<p>Upon advancement of this specification from a status of Experimental to a status of Draft, the &REGISTRAR; shall add the foregoing namespace to the registry located at &NAMESPACES;, as described in Section 4 of &xep0053;.</p>
</section2>
<section2 topic='Protocol Versioning' anchor='registrar-versioning'>
&NSVER;
</section2>
<section2 topic='MUC Status Codes Registry' anchor='registrar-mucstatus'>
<p>The XMPP Registrar is requested to add the elements defined in this specification to the existing registry for MUC status codes at &MUCSTATUS;.</p>
</section2>
</section1>
<section1 topic='XML Schema' anchor='schema'>
<code><![CDATA[
<?xml version='1.0' encoding='UTF-8'?>
<xs:schema
xmlns:xs='http://www.w3.org/2001/XMLSchema'
targetNamespace='urn:xmpp:muc:conditions:1'
xmlns='urn:xmpp:muc:conditions:1'
elementFormDefault='qualified'>
<xs:element name='affiliation-changed' type='MucStatusType'/>
<xs:element name='banned' type='MucStatusType'/>
<xs:element name='configuration-changed' type='MucStatusType'/>
<xs:element name='fully-anonymous' type='MucStatusType'/>
<xs:element name='kicked' type='MucStatusType'/>
<xs:element name='logging-disabled' type='MucStatusType'/>
<xs:element name='logging-enabled' type='MucStatusType'/>
<xs:element name='new-nick' type='MucStatusType'/>
<xs:element name='nick-assigned' type='MucStatusType'/>
<xs:element name='non-anonymous' type='MucStatusType'/>
<xs:element name='realjid-public' type='MucStatusType'/>
<xs:element name='removed-affiliation' type='MucStatusType'/>
<xs:element name='removed-membership' type='MucStatusType'/>
<xs:element name='removed-shutdown' type='MucStatusType'/>
<xs:element name='room-created' type='MucStatusType'/>
<xs:element name='self-presence' type='MucStatusType'/>
<xs:element name='semi-anonymous' type='MucStatusType'/>
<xs:element name='unavailable-not-shown' type='MucStatusType'/>
<xs:element name='unavailable-shown' type='MucStatusType'/>
<xs:complexType name='MucStatusType'>
<xs:sequence>
<xs:element ref='text'/>
<xs:any namespace='##other' minOccurs='0' maxOccurs='unbounded' processContents='lax'/>
</xs:sequence>
</xs:complexType>
</xs:schema>
<xs:element name='text'>
<xs:complexType>
<xs:simpleContent>
<xs:extension base='xs:string'>
<xs:attribute ref='xml:lang' use='optional'/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
]]></code>
</section1>
<section1 topic='Acknowledgements' anchor='ack'>
<p>Thanks to Dave Cridland and Ralph Meijer for their feedback.</p>
</section1>
</xep>
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