Conference Event Package Data Format Extension for Centralized Conferencing (XCON)
RFC 6502

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Internet Engineering Task Force (IETF)                      G. Camarillo
Request for Comments: 6502                                      Ericsson
Category: Standards Track                                  S. Srinivasan
ISSN: 2070-1721
                                                                 R. Even
                                                        Gesher Erove Ltd
                                                           J. Urpalainen
                                                                   Nokia
                                                              March 2012

             Conference Event Package Data Format Extension
                  for Centralized Conferencing (XCON)

Abstract

   This document specifies the notification mechanism for XCON
   (centralized conferencing).  This mechanism reuses the SIP (Session
   Initiation Protocol) event package for conference state.
   Additionally, the notification mechanism includes support for the
   XCON data model and for partial notifications.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6502.

Camarillo, et al.            Standards Track                    [Page 1]
RFC 6502                   XCON Event Package                 March 2012

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   This document may contain material from IETF Documents or IETF
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   Without obtaining an adequate license from the person(s) controlling
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   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Camarillo, et al.            Standards Track                    [Page 2]
RFC 6502                   XCON Event Package                 March 2012

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................4
   3. Notification Formats ............................................5
   4. Full Notifications ..............................................5
      4.1. Backwards Compatibility ....................................5
   5. Partial Notifications ...........................................6
      5.1. Generation of Partial Notifications ........................6
      5.2. Processing of Partial Notifications ........................7
      5.3. Partial Notification Format ................................8
      5.4. XML Schema for Partial Notifications .......................8
      5.5. Examples ...................................................9
   6. IANA Considerations ............................................10
      6.1. MIME type Registration:
           application/xcon-conference-info+xml ......................10
      6.2. MIME type Registration:
           application/xcon-conference-info-diff+xml .................11
      6.3. URN Sub-Namespace Registration:
           xcon-conference-info-diff .................................12
      6.4. XML Schema Registration ...................................12
   7. Security Considerations ........................................12
   8. References .....................................................13
      8.1. Normative References ......................................13
      8.2. Informative References ....................................13

1.  Introduction

   The XCON (Centralized Conferencing) framework [RFC5239] defines a