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An Extensible Markup Language (XML) Configuration Access Protocol (XCAP) Diff Event Package
RFC 5875

Internet Engineering Task Force (IETF)                     J. Urpalainen
Request for Comments: 5875                                         Nokia
Category: Standards Track                                 D. Willis, Ed.
ISSN: 2070-1721                                    Softarmor Systems LLC
                                                                May 2010

An Extensible Markup Language (XML) Configuration Access Protocol (XCAP)
                           Diff Event Package

Abstract

   This document describes an "xcap-diff" SIP (Session Initiation
   Protocol) event package for the SIP Event Notification Framework,
   which clients can use to receive notifications of changes to
   Extensible Markup Language (XML) Configuration Access Protocol (XCAP)
   resources.  The initial synchronization information exchange and
   document updates are based on the XCAP Diff format.

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/rfc5875.

Copyright Notice

   Copyright (c) 2010 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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Urpalainen & Willis          Standards Track                    [Page 1]
RFC 5875                     XCAP Diff Event                    May 2010

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   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.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   4.  XCAP Diff Event Package  . . . . . . . . . . . . . . . . . . .  4
     4.1.  Overview of Operation with Basic Requirements  . . . . . .  4
     4.2.  Event Package Name . . . . . . . . . . . . . . . . . . . .  5
     4.3.  'diff-processing' Event Package Parameter  . . . . . . . .  5
     4.4.  SUBSCRIBE Bodies . . . . . . . . . . . . . . . . . . . . .  6
     4.5.  Subscription Duration  . . . . . . . . . . . . . . . . . .  8
     4.6.  NOTIFY Bodies  . . . . . . . . . . . . . . . . . . . . . .  8
     4.7.  Notifier Generation of NOTIFY Requests . . . . . . . . . .  8
     4.8.  Subscriber Processing of NOTIFY Requests . . . . . . . . . 11
     4.9.  Handling of Forked Requests  . . . . . . . . . . . . . . . 13
     4.10. Rate of Notifications  . . . . . . . . . . . . . . . . . . 13
     4.11. State Agents . . . . . . . . . . . . . . . . . . . . . . . 13
   5.  An Initial Example NOTIFY Document . . . . . . . . . . . . . . 13
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 14
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 15
   8.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 15
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 16
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 17
   Appendix A.  Informative Examples  . . . . . . . . . . . . . . . . 18
     A.1.  Initial Documents on an XCAP Server  . . . . . . . . . . . 18
     A.2.  An Initial Subscription  . . . . . . . . . . . . . . . . . 18

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