RFC 3859 (rfc3859) - Page 1 of 15

Common Profile for Presence (CPP)

Network Working Group                                        J. Peterson
Request for Comments: 3859                                       NeuStar
Category: Standards Track                                    August 2004


                   Common Profile for Presence (CPP)

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).

Abstract

   At the time this document was written, numerous presence protocols
   were in use (largely as components of commercial instant messaging
   services), and little interoperability between services based on
   these protocols has been achieved.  This specification defines common
   semantics and data formats for presence to facilitate the creation of
   gateways between presence services.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Abstract Presence Service  . . . . . . . . . . . . . . . . . .  4
       3.1.  Overview of the Presence Service . . . . . . . . . . . .  4
       3.2.  Identification of PRESENTITIES and WATCHERS  . . . . . .  6
             3.2.1.  Address Resolution . . . . . . . . . . . . . . .  6
       3.3.  Format of Presence Information . . . . . . . . . . . . .  6
       3.4.  The Presence Service . . . . . . . . . . . . . . . . . .  7
             3.4.1.  The Subscribe Operation  . . . . . . . . . . . .  7
             3.4.2.  The Notify Operation . . . . . . . . . . . . . .  8
             3.4.3.  Subscribe Operation (with Zero Duration) . . . .  8
   4.  Security Considerations  . . . . . . . . . . . . . . . . . . .  8
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  9
       5.1.  The PRES URI Scheme  . . . . . . . . . . . . . . . . . .  9
   6.  Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 10
   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
       7.1.  Normative References . . . . . . . . . . . . . . . . . . 10
       7.2.  Informative References . . . . . . . . . . . . . . . . . 11



Peterson                    Standards Track