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vCard Extensions for Instant Messaging (IM)
RFC 4770

Document type: RFC - Proposed Standard (January 2007)
Obsoleted by RFC 6350
Was draft-jennings-impp-vcard (individual in gen area)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 4770 (Proposed Standard)
Responsible AD: Lisa Dusseault
Send notices to: julian.reschke@greenbytes.de, fluffy@cisco.com

Network Working Group                                        C. Jennings
Request for Comments: 4770                                 Cisco Systems
Category: Standards Track                                J. Reschke, Ed.
                                                              greenbytes
                                                            January 2007

              vCard Extensions for Instant Messaging (IM)

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 IETF Trust (2007).

Abstract

   This document describes an extension to vCard to support Instant
   Messaging (IM) and Presence Protocol (PP) applications.  IM and PP
   are becoming increasingly common ways of communicating, and users
   want to save this contact information in their address books.  It
   allows a URI that is associated with IM or PP to be specified inside
   a vCard.

Table of Contents

   1. Overview ........................................................2
   2. IANA Considerations .............................................3
   3. Formal Grammar ..................................................4
   4. Example .........................................................4
   5. Security Considerations .........................................4
   6. Acknowledgments .................................................4
   7. References ......................................................5
      7.1. Normative References .......................................5
      7.2. Informational References ...................................5

Jennings & Reschke          Standards Track                     [Page 1]
RFC 4770                       IMPP vCard                   January 2007

1.  Overview

   As more and more people use various instant messaging (IM) and
   presence protocol (PP) applications, it becomes important for them to
   be able to share this contact address information, along with the
   rest of their contact information.  RFC 2425 [1] and RFC 2426 [2]
   define a standard format for this information, which is referred to
   as vCard.  This document defines a new type in a vCard for
   representing instant IM and PP URIs.  It is very similar to existing
   types for representing email address and telephone contact
   information.

   The type entry to hold this new contact information is an IMPP type.
   The IMPP entry has a single URI (see RFC 3986 [3]) that indicates the
   address of a service that provides IM, PP, or both.  Also defined are
   some parameters that give hints as to when certain URIs would be
   appropriate.  A given vCard can have multiple IMPP entries, but each
   entry can contain only one URI.  Each IMPP entry can contain multiple
   parameters.  Any combination of parameters is valid, although a
   parameter should occur, at most, once in a given IMPP entry.

   The type of URI indicates what protocols might be usable for
   accessing it, but this document does not define any of the types.
   For example, a URI type of

   o  "sip" [5] indicates to use SIP/SIMPLE,
   o  "xmpp" [6] indicates to use XMPP,
   o  "irc" indicates to use IRC,
   o  "ymsgr" indicates to use yahoo,
   o  "msn" might indicate to use Microsoft messenger,
   o  "aim" indicates to use AOL, and
   o  "im" [7] or "pres" [8] indicates that a CPIM or CPP gateway should
      be used.

   The normative definition of this new vCard type is given in Section
   2, and an informational ABNF is provided in Section 3.

Jennings & Reschke          Standards Track                     [Page 2]
RFC 4770                       IMPP vCard                   January 2007

2.  IANA Considerations

   The required email to define this extension (as defined in RFC 2425
   [1]) was sent on October 29, 2004, to the ietf-mime-direct@imc.org
   mailing list with the subject "Registration of text/directory MIME
   type IMPP" (see <http://www.imc.org/ietf-mime-direct/mail-
   archive/msg00068.html>).

   This specification updates the "text/directory MIME Types"
   subregistry in the "text/directory MIME Registrations" registry at
   http://www.iana.org/assignments/text-directory-registrations with the
   following information:

   Type name: IMPP

   Type purpose: To specify the URI for instant messaging and presence

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