IMPP                                                         C. Jennings
Internet-Draft                                             Cisco Systems
Expires: December 27, 2003                                 June 28, 2003


                       vCard Extensions for IMPP
                      draft-jennings-impp-vcard-01

Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

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   This Internet-Draft will expire on December 27, 2003.

Copyright Notice

   Copyright (C) The Internet Society (2003). All Rights Reserved.

Abstract

   This draft describes an extension to vCard to support Instant
   Messaging (IM) and Presence Protocol (PP) applications. It allows a
   URL that is associated with IM or PP to be specified inside of a
   vCard.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [3].

1. Overview

   As more and more people use various instant messaging (IM) and
   presence protocol (PP) applications, it becomes important for them to



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   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 IMPP
   URLs. 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 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 URLs would be
   appropriate. A given vCard can have multiple IMPP entries but each
   entry can contain only one URL. Each IMPP entry can contain multiple
   parameters. Any combination of parameters is valid, though a
   parameter should occur at most once in a given IMPP entry.

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

2. IMPP Type Definition

   To: ietf-mime-directory@imc.org

   Subject: Registration of text/directory MIME type IMPP

   Type name: IMPP

   Type purpose: To specify the URL for instant messaging and presence
   protocol communication with the object the vCard represents.

   Type encoding: 8bit

   Type value: A single URL.

   Type special notes: The type can include the type parameter "TYPE" to
   specify an intended use for the URL. The TYPE parameter values can
   include:

   An indication of the type of communication for which this URL is
   appropriate. This can be a value of PERSONAL or BUSINESS.

   An indication of the location of a device associated with this URL.
   Values can be HOME, WORK, or MOBILE.

   An indication of some of the core capabilities of this instant
   messaging system. Values can be PRES, VIDEO, VOICE, TEXT, SMS,
   NUMERIC, and BEEP. PRES indicates the system supports some presence
   protocol. VIDEO, VOICE, and TEXT indicate the system supports voice,



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   video, and text messaging respectively. SMS indicates short text
   messages. Short is not defined here but something like 160 octets may
   be a reasonable assumption. NUMERIC indicates that only numeric text
   messages are allowed. BEEP indicates that the only information the
   system can deliver is that a message was sent to the target user.

   The value STORE indicates that the system can store messages for
   future delivery to intended the intended user.

   The value PREF indicates this is a preferred address and has the same
   semantics as the PREF value in a TEL type.

3. Formal Grammar

   The following ABNF grammar[4] extends the grammar found in RFC 2425
   [1] and RFC 2426 [2].


   ;For name="IMPP"
    param      = impp-param ; Only impp parameters are allowed

    value      = uri

    impp-param = "TYPE" "=" impp-type *("," impp-type)

    impp-type  = "PERSONAL" / "BUSINESS" / ; purpose of communications
                 "HOME" / "WORK" / "MOBILE" / ; useful?
                 "VIDEO" / "VOICE" / "TEXT" /  ; core capabilities
                 "SMS" / "NUMERIC"  /  "BEEP"  / "PRES" ;  needed???
                 "STORE" / ;  like MSG
                 "PREF" /
                 iana-token / x-name;
                 ; Values are case insensitive


4. Example


   BEGIN:vCard
   VERSION:3.0
   FN:John Doe
   IMPP;TYPE=personal,text,store,pref:im:john@example.com
   END:vCard


5. IANA Considerations

   Section 2 forms the IANA registration.



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6. Security Considerations

   This does not introduce additional security issues beyond current
   vCard specification. It is worth noting that many people consider
   their presence information more sensitive than some other address
   information. Any system that stores or transfers vCards needs to
   carefully consider the privacy issues around this information.

Normative References

   [1]  Howes, T., Smith, M. and F. Dawson, "A MIME Content-Type for
        Directory Information", RFC 2425, September 1998.

   [2]  Dawson, F. and T. Howes, "vCard MIME Directory Profile", RFC
        2426, September 1998.

   [3]  Bradner, S., "Key words for use in RFCs to Indicate Requirement
        Levels", BCP 14, RFC 2119, March 1997.

Informational References

   [4]  Crocker, D. and P. Overell, "Augmented BNF for Syntax
        Specifications: ABNF", RFC 2234, November 1997.


Author's Address

   Cullen Jennings
   Cisco Systems
   170 West Tasman Drive
   MS: SJC-21/3
   San Jose, CA  95134
   USA

   Phone: +1 408 527-9132
   EMail: fluffy@cisco.com















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