CIPID: Contact Information for the Presence Information Data Format
RFC 4482

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Network Working Group                                     H. Schulzrinne
Request for Comments: 4482                                   Columbia U.
Category: Standards Track                                      July 2006

  CIPID: Contact Information for the Presence Information Data Format

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 (2006).

Abstract

   The Presence Information Data Format (PIDF) defines a basic XML
   format for presenting presence information for a presentity.  The
   Contact Information for the Presence Information Data format (CIPID)
   is an extension that adds elements to PIDF that provide additional
   contact information about a presentity and its contacts, including
   references to address book entries and icons.

Schulzrinne                 Standards Track                     [Page 1]
RFC 4482                         CIPID                         July 2006

Table of Contents

   1. Introduction ....................................................2
   2. Terminology and Conventions .....................................3
   3. CIPID Elements ..................................................3
      3.1. Card Element ...............................................3
      3.2. Display-Name Element .......................................3
      3.3. Homepage Element ...........................................3
      3.4. Icon Element ...............................................4
      3.5. Map Element ................................................4
      3.6. Sound Element ..............................................4
   4. Example .........................................................4
   5. The XML Schema Definition .......................................6
   6. IANA Considerations .............................................7
      6.1. URN Sub-Namespace Registration for .........................7
           'urn:ietf:params:xml:ns:pidf:cipid'
      6.2. Schema Registration for Schema
           'urn:ietf:params:xml:ns:pidf:cipid' ........................7
   7. Internationalization Considerations .............................8
   8. Security Considerations .........................................8
   9. References ......................................................9
      9.1. Normative References .......................................9
      9.2. Informative References ....................................10

1.  Introduction

   Presence information facilitates communication; its usefulness can be
   enhanced by providing basic information about a presentity or
   contact.  This specification describes a basic set of information
   elements that allow a watcher to retrieve additional information
   about a presentity or contact.

   This specification defines extensions to the PIDF [9] Extensible
   Markup Language [7][8][10] (XML) document format.

   We describe elements for providing a "business card", references to
   the homepage, map, representative sound, display name, and an icon.
   This additional presence information can be used in PIDF [9]
   documents, together with Rich Presence Information Data format [11]
   (RPID), future-status [12], and other PIDF extensions.

   All elements extend the <person> or, less commonly, <tuple> element
   in the presence data model [13].  The <tuple> element is only
   extended with Contact Information for the Presence Information Data
   format (CIPID) elements if the information describes a service
   referring to another person that is marked by an RPID <relationship>
   element with a value other than 'self'.  All elements described in
   this document are optional.

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RFC 4482                         CIPID                         July 2006

   RPID and CIPID both provide "rich" presence that goes beyond the
   basic 'open' and 'closed' status information in PIDF.  The presence
   information described in these two documents can be supplied
   independently, although in practice, both will often appear in the
   same PIDF document.  CIPID elements describe the more static aspects
   of somebody's presence information, while RPID focuses on elements
   that will likely change throughout the day.  Thus, CIPID information
   can often be statically configured by the user through the graphical
   user interface of a presence client; this is less likely to be
   sufficient for RPID.

   The namespace URI for these elements defined by this specification is
   a URN [2], using the namespace identifier 'ietf' defined by [4] and
   extended by [6]: