<xs:any namespace=’##other’
minOccurs=’0’/>
<xs:element ref=’error’
minOccurs=’0’/>
</xs:sequence>
<xs:attribute name=’from’
type=’xs:string’
use=’optional’/>
<xs:attribute name=’id’
type=’xs:NMTOKEN’
use=’required’/>
<xs:attribute name=’to’
type=’xs:string’
use=’optional’/>
<xs:attribute name=’type’ use=’required’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’error’/>
<xs:enumeration value=’get’/>
<xs:enumeration value=’result’/>
<xs:enumeration value=’set’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute ref=’xml:lang’ use=’optional’/>
</xs:complexType>
</xs:element>
<xs:element name=’error’>
<xs:complexType>
<xs:sequence xmlns:err=’urn:ietf:params:xml:ns:xmpp-stanzas’>
<xs:group ref=’err:stanzaErrorGroup’/>
<xs:element ref=’err:text’
minOccurs=’0’/>
</xs:sequence>
<xs:attribute name=’code’ type=’xs:byte’ use=’optional’/>
<xs:attribute name=’type’ use=’required’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’auth’/>
<xs:enumeration value=’cancel’/>
<xs:enumeration value=’continue’/>
<xs:enumeration value=’modify’/>
<xs:enumeration value=’wait’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:complexType>
</xs:element>
</xs:schema>
B.2 jabber:server
<?xml version=’1.0’ encoding=’UTF-8’?>
<xs:schema
xmlns:xs=’http://www.w3.org/2001/XMLSchema’
targetNamespace=’jabber:server’
xmlns=’jabber:server’
elementFormDefault=’qualified’>
<xs:import namespace=’urn:ietf:params:xml:ns:xmpp-stanzas’/>
<xs:element name=’message’>
<xs:complexType>
<xs:sequence>
<xs:choice minOccurs=’0’ maxOccurs=’unbounded’>
<xs:element ref=’subject’/>
<xs:element ref=’body’/>
<xs:element ref=’thread’/>
</xs:choice>
<xs:any namespace=’##other’
minOccurs=’0’
maxOccurs=’unbounded’/>
<xs:element ref=’error’
minOccurs=’0’/>
</xs:sequence>
<xs:attribute name=’from’
type=’xs:string’
use=’required’/>
<xs:attribute name=’id’
type=’xs:NMTOKEN’
use=’optional’/>
<xs:attribute name=’to’
type=’xs:string’
use=’required’/>
<xs:attribute name=’type’ use=’optional’ default=’normal’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’chat’/>
<xs:enumeration value=’error’/>
<xs:enumeration value=’groupchat’/>
<xs:enumeration value=’headline’/>
<xs:enumeration value=’normal’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute ref=’xml:lang’ use=’optional’/>
</xs:complexType>
</xs:element>
<xs:element name=’body’>
<xs:complexType>
<xs:simpleContent>
<xs:extension base=’xs:string’>
<xs:attribute ref=’xml:lang’ use=’optional’/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name=’subject’>
<xs:complexType>
<xs:simpleContent>
<xs:extension base=’xs:string’>
<xs:attribute ref=’xml:lang’ use=’optional’/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name=’thread’ type=’xs:NMTOKEN’/>
<xs:element name=’presence’>
<xs:complexType>
<xs:sequence>
<xs:choice minOccurs=’0’ maxOccurs=’unbounded’>
<xs:element ref=’show’/>
<xs:element ref=’status’/>
<xs:element ref=’priority’/>
</xs:choice>
<xs:any namespace=’##other’
minOccurs=’0’
maxOccurs=’unbounded’/>
<xs:element ref=’error’
minOccurs=’0’/>
</xs:sequence>
<xs:attribute name=’from’
type=’xs:string’
use=’required’/>
<xs:attribute name=’id’
type=’xs:NMTOKEN’
use=’optional’/>
<xs:attribute name=’to’
type=’xs:string’
use=’required’/>
<xs:attribute name=’type’ use=’optional’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’error’/>
<xs:enumeration value=’probe’/>
<xs:enumeration value=’subscribe’/>
<xs:enumeration value=’subscribed’/>
<xs:enumeration value=’unavailable’/>
<xs:enumeration value=’unsubscribe’/>
<xs:enumeration value=’unsubscribed’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute ref=’xml:lang’ use=’optional’/>
</xs:complexType>
</xs:element>
<xs:element name=’show’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’away’/>
<xs:enumeration value=’chat’/>
<xs:enumeration value=’dnd’/>
<xs:enumeration value=’xa’/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name=’status’>
<xs:complexType>
<xs:simpleContent>
<xs:extension base=’xs:string’>
<xs:attribute ref=’xml:lang’ use=’optional’/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name=’priority’ type=’xs:byte’/>
<xs:element name=’iq’>
<xs:complexType>
<xs:sequence>
<xs:any namespace=’##other’
minOccurs=’0’/>
<xs:element ref=’error’
minOccurs=’0’/>
</xs:sequence>
<xs:attribute name=’from’
type=’xs:string’
use=’required’/>
<xs:attribute name=’id’
type=’xs:NMTOKEN’
use=’required’/>
<xs:attribute name=’to’
type=’xs:string’
use=’required’/>
<xs:attribute name=’type’ use=’required’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’error’/>
<xs:enumeration value=’get’/>
<xs:enumeration value=’result’/>
<xs:enumeration value=’set’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute ref=’xml:lang’ use=’optional’/>
</xs:complexType>
</xs:element>
<xs:element name=’error’>
<xs:complexType>
<xs:sequence xmlns:err=’urn:ietf:params:xml:ns:xmpp-stanzas’>
<xs:group ref=’err:stanzaErrorGroup’/>
<xs:element ref=’err:text’
minOccurs=’0’/>
</xs:sequence>
<xs:attribute name=’code’ type=’xs:byte’ use=’optional’/>
<xs:attribute name=’type’ use=’required’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’auth’/>
<xs:enumeration value=’cancel’/>
<xs:enumeration value=’continue’/>
<xs:enumeration value=’modify’/>
<xs:enumeration value=’wait’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:complexType>
</xs:element>
</xs:schema>
B.3 session
<?xml version=’1.0’ encoding=’UTF-8’?>
<xs:schema
xmlns:xs=’http://www.w3.org/2001/XMLSchema’
targetNamespace=’urn:ietf:params:xml:ns:xmpp-session’
xmlns=’urn:ietf:params:xml:ns:xmpp-session’
elementFormDefault=’qualified’>
<xs:element name=’session’ type=’empty’/>
<xs:simpleType name=’empty’>
<xs:restriction base=’xs:string’>
<xs:enumeration value=’’/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
B.4 jabber:iq:privacy
<?xml version=’1.0’ encoding=’UTF-8’?>
<xs:schema
xmlns:xs=’http://www.w3.org/2001/XMLSchema’
targetNamespace=’jabber:iq:privacy’
xmlns=’jabber:iq:privacy’
elementFormDefault=’qualified’>
<xs:element name=’query’>
<xs:complexType>
<xs:sequence>
<xs:element ref=’active’
minOccurs=’0’/>
<xs:element ref=’default’
minOccurs=’0’/>
<xs:element ref=’list’
minOccurs=’0’
maxOccurs=’unbounded’/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name=’active’>
<xs:complexType>
<xs:simpleContent>
<xs:extension base=’xs:NMTOKEN’>
<xs:attribute name=’name’
type=’xs:string’
use=’optional’/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name=’default’>
<xs:complexType>
<xs:simpleContent>
<xs:extension base=’xs:NMTOKEN’>
<xs:attribute name=’name’
type=’xs:string’
use=’optional’/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name=’list’>
<xs:complexType>
<xs:sequence>
<xs:element ref=’item’
minOccurs=’0’
maxOccurs=’unbounded’/>
</xs:sequence>
<xs:attribute name=’name’
type=’xs:string’
use=’required’/>
</xs:complexType>
</xs:element>
<xs:element name=’item’>
<xs:complexType>
<xs:sequence>
<xs:element name=’iq’
minOccurs=’0’
type=’empty’/>
<xs:element name=’message’
minOccurs=’0’
type=’empty’/>
<xs:element name=’presence-in’
minOccurs=’0’
type=’empty’/>
<xs:element name=’presence-out’
minOccurs=’0’
type=’empty’/>
</xs:sequence>
<xs:attribute name=’action’ use=’required’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’allow’/>
<xs:enumeration value=’deny’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name=’order’
type=’xs:unsignedInt’
use=’required’/>
<xs:attribute name=’type’ use=’optional’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’group’/>
<xs:enumeration value=’jid’/>
<xs:enumeration value=’subscription’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name=’value’
type=’xs:string’
use=’optional’/>
</xs:complexType>
</xs:element>
<xs:simpleType name=’empty’>
<xs:restriction base=’xs:string’>
<xs:enumeration value=’’/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
B.5 jabber:iq:roster
<?xml version=’1.0’ encoding=’UTF-8’?>
<xs:schema
xmlns:xs=’http://www.w3.org/2001/XMLSchema’
targetNamespace=’jabber:iq:roster’
xmlns=’jabber:iq:roster’
elementFormDefault=’qualified’>
<xs:element name=’query’>
<xs:complexType>
<xs:sequence>
<xs:element ref=’item’
minOccurs=’0’
maxOccurs=’unbounded’/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name=’item’>
<xs:complexType>
<xs:sequence>
<xs:element ref=’group’
minOccurs=’0’
maxOccurs=’unbounded’/>
</xs:sequence>
<xs:attribute name=’ask’ use=’optional’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’subscribe’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name=’jid’ type=’xs:string’ use=’required’/>
<xs:attribute name=’name’ type=’xs:string’ use=’optional’/>
<xs:attribute name=’subscription’ use=’optional’>
<xs:simpleType>
<xs:restriction base=’xs:NCName’>
<xs:enumeration value=’both’/>
<xs:enumeration value=’from’/>
<xs:enumeration value=’none’/>
<xs:enumeration value=’remove’/>
<xs:enumeration value=’to’/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:complexType>
</xs:element>
<xs:element name=’group’ type=’xs:string’/>
</xs:schema>
Appendix C. Differences Between Jabber IM/Presence Protocols and XMPP
This section is non-normative.
XMPP has been adapted from the protocols originally developed in the
Jabber open-source community, which can be thought of as "XMPP 0.9".
Because there exists a large installed base of Jabber implementations
and deployments, it may be helpful to specify the key differences
between the relevant Jabber protocols and XMPP in order to expedite
and encourage upgrades of those implementations and deployments to
XMPP. This section summarizes the differences that relate
specifically to instant messaging and presence applications, while
the corresponding section of [XMPP-CORE] summarizes the differences
that relate to all XMPP applications.
C.1 Session Establishment
The client-to-server authentication protocol developed in the Jabber
community assumed that every client is an IM client and therefore
initiated an IM session upon successful authentication and resource
binding, which are performed simultaneously (documentation of this
protocol is contained in [JEP-0078], published by the Jabber Software
Foundation [JSF]). XMPP maintains a stricter separation between core
functionality and IM functionality; therefore, an IM session is not
created until the client specifically requests one using the protocol
defined under Session Establishment (Section 3).
C.2 Privacy Lists
The Jabber community began to define a protocol for communications
blocking (privacy lists) in late 2001, but that effort was deprecated
once the XMPP Working Group was formed. Therefore the protocol
defined under Blocking Communication (Section 10) is the only such
protocol defined for use in the Jabber community.
Contributors
Most of the core aspects of the Extensible Messaging and Presence
Protocol were developed originally within the Jabber open-source
community in 1999. This community was founded by Jeremie Miller, who
released source code for the initial version of the jabberd server in
January 1999. Major early contributors to the base protocol also
included Ryan Eatmon, Peter Millard, Thomas Muldowney, and Dave
Smith. Work specific to instant messaging and presence by the XMPP
Working Group has concentrated especially on IM session establishment
and communication blocking (privacy lists); the session establishment
protocol was mainly developed by Rob Norris and Joe Hildebrand, and
the privacy lists protocol was originally contributed by Peter
Millard.
Acknowledgements
Thanks are due to a number of individuals in addition to the
contributors listed. Although it is difficult to provide a complete
list, the following individuals were particularly helpful in defining
the protocols or in commenting on the specifications in this memo:
Thomas Charron, Richard Dobson, Schuyler Heath, Jonathan Hogg, Craig
Kaes, Jacek Konieczny, Lisa Dusseault, Alexey Melnikov, Keith
Minkler, Julian Missig, Pete Resnick, Marshall Rose, Jean-Louis
Seguineau, Alexey Shchepin, Iain Shigeoka, and David Waite. Thanks
also to members of the XMPP Working Group and the IETF community for
comments and feedback provided throughout the life of this memo.
Author’s Address
Peter Saint-Andre (editor)
Jabber Software Foundation
EMail: stpeter@jabber.org
Full Copyright Statement
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