Network Working Group C. Jennings Internet-Draft Cisco Systems Expires: January 12, 2006 July 11, 2005 vCard Extensions for Instant Messaging (IM) draft-jennings-impp-vcard-05 Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on January 12, 2006. Copyright Notice Copyright (C) The Internet Society (2005). 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. This draft allows a URI that is associated with IM or PP to be specified inside of a vCard. Jennings Expires January 12, 2006 [Page 1] Internet-Draft IMPP vCard July 2005 1. Conventions 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]. 2. 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 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 useable for accessing it, but this document does not define any of the types. For example a URI type of "sip"[6] indicates to use SIP/SIMPLE, "xmpp"[7] indicates to use XMPP, "irc"[5] indicates to use IRC, "ymsgr" indicates to use yahoo, "msn" might indicate to use Microsoft messenger, "aim" indicates to use AOL, and "im"[9] or "pres"[8] indicates to use a CPIM or CPP gateway. The normative definition of this new vCard type is given in Section 3, and an informational ABNF is provided in Section 4. 3. IANA Considerations The required email to define this extension (as defined in RFC2425) 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". Jennings Expires January 12, 2006 [Page 2] Internet-Draft IMPP vCard July 2005 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 protocol communications with the object the vCard represents. Type encoding: 8bit Type value: A single URI. The type of the URI indicates the protocol that can be used for this contact. Type special notes: The type can include the type parameter "TYPE" to specify an intended use for the URI. The TYPE parameter values can include: o An indication of the type of communication for which this URI is appropriate. This can be a value of PERSONAL or BUSINESS. o An indication of the location of a device associated with this URI. Values can be HOME, WORK, or MOBILE. o The value PREF indicates this is a preferred address and has the same semantics as the PREF value in a TEL type. Additional information can be found in RFCAAAA. Intended usage: COMMON [Note to IANA: Please replace AAAA with the RFC number for this specification.] 4. Formal Grammar The following ABNF grammar [4] extends the grammar found in RFC 2425 [1] and RFC 2426 [2]. Jennings Expires January 12, 2006 [Page 3] Internet-Draft IMPP vCard July 2005 ;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" / "PREF" / iana-token / x-name; ; Values are case insensitive 5. Example BEGIN:vCard VERSION:3.0 FN:Alice Doe IMPP;TYPE=personal,pref:im:alice@example.com END:vCard 6. Security Considerations This does not introduce additional security issues beyond the current vCard specification. It is worth noting that many people consider their presence information more sensitive than other address information. Any system that stores or transfers vCards needs to carefully consider the privacy issues around this information. 7. Acknowledgments Thanks to Paul Hoffman, Sam Roberts and Pekka Pessi for their comments. 8. References 8.1 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 Jennings Expires January 12, 2006 [Page 4] Internet-Draft IMPP vCard July 2005 Levels", BCP 14, RFC 2119, March 1997. 8.2 Informational References [4] Crocker, D. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", RFC 2234, November 1997. [5] Butcher, S., "Uniform Resource Locator Schemes for Internet Relay Chat Entities", draft-butcher-irc-url-04 (work in progress), January 2004. [6] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M., and E. Schooler, "SIP: Session Initiation Protocol", RFC 3261, June 2002. [7] Saint-Andre, P., "XMPP URI Format", draft-saintandre-xmpp-uri-08 (work in progress), December 2004. [8] Peterson, J., "Common Profile for Presence (CPP)", RFC 3859, August 2004. [9] Peterson, J., "Common Profile for Instant Messaging (CPIM)", RFC 3860, August 2004. Author's Address Cullen Jennings Cisco Systems 170 West Tasman Drive MS: SJC-21/2 San Jose, CA 95134 USA Phone: +1 408 902-3341 Email: fluffy@cisco.com Jennings Expires January 12, 2006 [Page 5] Internet-Draft IMPP vCard July 2005 Intellectual Property Statement The IETF takes no position regarding the validity or scope of any Intellectual Property Rights or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; nor does it represent that it has made any independent effort to identify any such rights. Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. 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Disclaimer of Validity This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Copyright Statement Copyright (C) The Internet Society (2005). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. Acknowledgment Funding for the RFC Editor function is currently provided by the Internet Society. Jennings Expires January 12, 2006 [Page 6]