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An Extensible Markup Language (XML) Document Format for Indicating a Change in XML Configuration Access Protocol (XCAP) Resources
RFC 5874

Internet Engineering Task Force (IETF)                      J. Rosenberg
Request for Comments: 5874                                   jdrosen.net
Category: Standards Track                                  J. Urpalainen
ISSN: 2070-1721                                                    Nokia
                                                                May 2010

        An Extensible Markup Language (XML) Document Format for
                         Indicating a Change in
           XML Configuration Access Protocol (XCAP) Resources

Abstract

   This specification defines a document format that can be used to
   indicate that a change has occurred in a document managed by the
   Extensible Markup Language (XML) Configuration Access Protocol
   (XCAP).  This format reports which document has changed and its
   former and new entity tags.  It can report the differences between
   versions of the document, using an XML patch format.  It can report
   existing element and attribute content when versions of an XCAP
   server document change.  XCAP diff documents can be delivered to diff
   clients using a number of means, including a Session Initiation
   Protocol (SIP) event package.

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/rfc5874.

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

Rosenberg & Urpalainen       Standards Track                    [Page 1]
RFC 5874                    XCAP Diff Format                    May 2010

   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.

   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.  Structure of an XCAP Diff Document . . . . . . . . . . . . . .  5
   4.  XML Schema . . . . . . . . . . . . . . . . . . . . . . . . . .  8
   5.  Example Document . . . . . . . . . . . . . . . . . . . . . . . 11
   6.  Basic Requirements for a System Exchanging XCAP Diff
       Documents  . . . . . . . . . . . . . . . . . . . . . . . . . . 11
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 13
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 14
     8.1.  application/xcap-diff+xml MIME Type  . . . . . . . . . . . 14
     8.2.  URN Sub-Namespace Registration for
           urn:ietf:params:xml:ns:xcap-diff . . . . . . . . . . . . . 15
     8.3.  Schema Registration  . . . . . . . . . . . . . . . . . . . 15
   9.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 16
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     10.1. Normative References . . . . . . . . . . . . . . . . . . . 16
     10.2. Informative References . . . . . . . . . . . . . . . . . . 17
   Appendix A.  Informative Examples  . . . . . . . . . . . . . . . . 18
     A.1.  Indicating Existing, Changed, or Removed Documents . . . . 18
     A.2.  Indicating Actual Changes of Documents . . . . . . . . . . 21
     A.3.  Indicating XCAP Component Contents . . . . . . . . . . . . 23

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