Traditionally, Multi-User Chat (XEP-0045) [1] has used numerical status codes similar to those used in HTTP and SMTP. Numerical codes were deprecated in the core of XMPP by RFC 3920 [2] and are no longer even defined in the core schemas provided in RFC 6120 [3] (see also Error Condition Mappings (XEP-0086) [4]). In an effort to modernize the Multi-User Chat (MUC) protocol, this document defines an extensible format for status conditions in MUC.
XML elements describing status conditions defined by this specification SHALL be qualified by the 'urn:xmpp:muc:conditions:1' namespace.
The structure is as follows:
<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>
That is, any <status/> 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 <text/> element and MAY contain an application-specific condition element) and MAY contain one or more application-specific condition elements.
An example follows.
<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>
The following table maps the existing numerical status codes (registered with the XMPP Registrar [5] at <https://xmpp.org/registrar/mucstatus.html>) to XML elements.
| Code | Element |
|---|---|
| 100 | <realjid-public/> |
| 101 | <affiliation-changed/> |
| 102 | <unavailable-shown/> |
| 103 | <unavailable-not-shown/> |
| 104 | <configuration-changed/> |
| 110 | <self-presence/> |
| 170 | <logging-enabled/> |
| 171 | <logging-disabled/> |
| 172 | <non-anonymous/> |
| 173 | <semi-anonymous/> |
| 174 | <fully-anonymous/> |
| 201 | <room-created/> |
| 210 | <nick-assigned/> |
| 301 | <banned/> |
| 303 | <new-nick/> |
| 307 | <kicked/> |
| 321 | <removed-affiliation/> |
| 322 | <removed-membership/> |
| 332 | <removed-shutdown/> |
The security considerations of XEP-0045 apply.
This document requires no interaction with the Internet Assigned Numbers Authority (IANA) [6].
This specification defines the following XML namespace:
Upon advancement of this specification from a status of Experimental to a status of Draft, the XMPP Registrar [5] shall add the foregoing namespace to the registry located at <https://xmpp.org/registrar/namespaces.html>, as described in Section 4 of XMPP Registrar Function (XEP-0053) [7].
If the protocol defined in this specification undergoes a revision that is not fully backwards-compatible with an older version, the XMPP Registrar shall increment the protocol version number found at the end of the XML namespaces defined herein, as described in Section 4 of XEP-0053.
The XMPP Registrar is requested to add the elements defined in this specification to the existing registry for MUC status codes at <https://xmpp.org/registrar/mucstatus.html>.
<?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>
Thanks to Dave Cridland and Ralph Meijer for their feedback.
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The Extensible Messaging and Presence Protocol (XMPP) is defined in the XMPP Core (RFC 6120) and XMPP IM (RFC 6121) specifications contributed by the XMPP Standards Foundation to the Internet Standards Process, which is managed by the Internet Engineering Task Force in accordance with RFC 2026. Any protocol defined in this document has been developed outside the Internet Standards Process and is to be understood as an extension to XMPP rather than as an evolution, development, or modification of XMPP itself.
The primary venue for discussion of XMPP Extension Protocols is the <standards@xmpp.org> discussion list.
Discussion on other xmpp.org discussion lists might also be appropriate; see <http://xmpp.org/about/discuss.shtml> for a complete list.
Given that this XMPP Extension Protocol normatively references IETF technologies, discussion on the <xsf-ietf@xmpp.org> list might also be appropriate.
Errata can be sent to <editor@xmpp.org>.
The following requirements keywords as used in this document are to be interpreted as described in RFC 2119: "MUST", "SHALL", "REQUIRED"; "MUST NOT", "SHALL NOT"; "SHOULD", "RECOMMENDED"; "SHOULD NOT", "NOT RECOMMENDED"; "MAY", "OPTIONAL".
1. XEP-0045: Multi-User Chat <https://xmpp.org/extensions/xep-0045.html>.
2. RFC 3920: Extensible Messaging and Presence Protocol (XMPP): Core <http://tools.ietf.org/html/rfc3920>.
3. RFC 6120: Extensible Messaging and Presence Protocol (XMPP): Core <http://tools.ietf.org/html/rfc6120>.
4. XEP-0086: Error Condition Mappings <https://xmpp.org/extensions/xep-0086.html>.
5. The XMPP Registrar maintains a list of reserved protocol namespaces as well as registries of parameters used in the context of XMPP extension protocols approved by the XMPP Standards Foundation. For further information, see <https://xmpp.org/registrar/>.
6. The Internet Assigned Numbers Authority (IANA) is the central coordinator for the assignment of unique parameter values for Internet protocols, such as port numbers and URI schemes. For further information, see <http://www.iana.org/>.
7. XEP-0053: XMPP Registrar Function <https://xmpp.org/extensions/xep-0053.html>.
Note: Older versions of this specification might be available at http://xmpp.org/extensions/attic/
Fix broken example XML.
Modified format to make it more backward compatible; incremented protocol namespace.
Initial published version.
Rough draft.
END