Network Working Group C. Jennings Internet-Draft Cisco Systems Intended status: Standards Track J. Reschke, Ed. Expires: March 25, 2007 greenbytes September 21, 2006 vCard Extensions for Instant Messaging (IM) draft-jennings-impp-vcard-08 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 March 25, 2007. Copyright Notice Copyright (C) The Internet Society (2006). 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 of a vCard. Jennings & Reschke Expires March 25, 2007 [Page 1]
Internet-Draft IMPP vCard September 2006 Editorial Note (To be removed by RFC Editor before publication) This work is being discussed on the imc-vcard@imc.org mailing list. 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 "sip" [5] indicates to use SIP/SIMPLE, "xmpp" [6] indicates to use XMPP, "irc" [7] indicates to use IRC, "ymsgr" indicates to use yahoo, "msn" might indicate to use Microsoft messenger, "aim" indicates to use AOL, and "im" [8] or "pres" [9] indicates to use a CPIM or CPP gateway. The normative definition of this new vCard type is given in Section 2, and an informational ABNF is provided in Section 3. 2. 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" (see <http://www.imc.org/ietf-mime-direct/mail-archive/msg00068.html>). Jennings & Reschke Expires March 25, 2007 [Page 2]
Internet-Draft IMPP vCard September 2006 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 may include the type parameter "TYPE" to specify an intended use for the URI. The TYPE parameter values include one or more of the following: 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.]_ 3. Formal Grammar The following ABNF grammar [4] extends the grammar found in RFC 2425 [1] (Section 5.8.2) and RFC 2426 [2] (Section 4). Jennings & Reschke Expires March 25, 2007 [Page 3]
Internet-Draft IMPP vCard September 2006 ;For name="IMPP" param = impp-param ; Only impp parameters are allowed value = URI ; URI defined in Section 3 of [3] 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 4. Example BEGIN:vCard VERSION:3.0 FN:Alice Doe IMPP;TYPE=personal,pref:im:alice@example.com END:vCard 5. 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. 6. Acknowledgments Thanks to Brian Carpenter, Lars Eggert, Ted Hardie, Paul Hoffman, Sam Roberts and Pekka Pessi for their comments. 7. References 7.1. 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", Jennings & Reschke Expires March 25, 2007 [Page 4]
Internet-Draft IMPP vCard September 2006 RFC 2426, September 1998. [3] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, January 2005. [4] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", RFC 4234, October 2005. 7.2. Informational References [5] 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. [6] Saint-Andre, P., "Internationalized Resource Identifiers (IRIs) and Uniform Resource Identifiers (URIs) for the Extensible Messaging and Presence Protocol (XMPP)", RFC 4622, July 2006. [7] Butcher, S., "Uniform Resource Locator Schemes for Internet Relay Chat Entities", draft-butcher-irc-url-04 (work in progress), January 2004. [8] Peterson, J., "Common Profile for Instant Messaging (CPIM)", RFC 3860, August 2004. [9] Peterson, J., "Common Profile for Presence (CPP)", RFC 3859, August 2004. Appendix A. Change Log (to be removed by RFC Editor before publication) A.1. Since draft-jennings-impp-vcard-06.xml Remove "Notational Conventions" (weren't actually used). Take out reference to RFC2119 accordingly. Highlight editing instructions for the RFC Editor. Add link to mention of registration request email. Update reference to ABNF RFC and XMPP URI/IRI draft. Add Julian Reschke as Editor. Jennings & Reschke Expires March 25, 2007 [Page 5]
Internet-Draft IMPP vCard September 2006 Appendix B. Since draft-jennings-impp-vcard-07.xml Update XMPP URI/IRI reference. Add and resolve issues "abnf-ref-normative", "clarify-type- recurrence" and "cite-rfc3986-for-URI". Add open issue "mention-other-approaches". Appendix C. Resolved issues (to be removed by RFC Editor before publication) Issues that were either rejected or resolved in this version of this document. C.1. ref-rfc4622 Type: edit julian.reschke@greenbytes.de (2006年07月26日): Update ref to XMPP URI/IRI spec. Resolution: Done. C.2. abnf-ref-normative Type: change julian.reschke@greenbytes.de (2006年09月13日): Ted Hardie: I believe citing the ABNF RFC as normative is also required. Resolution (2006年09月13日): Done. C.3. cite-rfc3986-for-URI Type: change julian.reschke@greenbytes.de (2006年09月13日): Ted Hardie: This document apparently imports the definition of uri from 2425, which in turn says that URI is "as defined in 1738". 1738's description of URIs has long been superseded, and its formal description of genericurl (the closest thing to this) is in RFC822's BNF-like grammar, not ABNF. May I suggest this document cite RFC 3986 directly? It's a full standard. Resolution (2006年09月13日): Done. Jennings & Reschke Expires March 25, 2007 [Page 6]
Internet-Draft IMPP vCard September 2006 C.4. clarify-type-recurrence Type: change julian.reschke@greenbytes.de (2006年09月14日): Clarify that type parameter contains one or more values. Resolution (2006年09月14日): Done. Appendix D. Open issues (to be removed by RFC Editor prior to publication) D.1. edit Type: edit julian.reschke@greenbytes.de (2006年06月25日): Umbrella issue for editorial fixes/enhancements. D.2. irc-uri Type: edit julian.reschke@greenbytes.de (2006年06月25日): Take out reference to IRC URI draft (which is dead)? D.3. mention-other-approaches Type: edit julian.reschke@greenbytes.de (2006年09月21日): Lars Eggert (IESG discussion): Might want to mention that some vendors have already extended the vcard format to include IM addresses. julian.reschke@greenbytes.de (2006年09月21日): I think there are two sides to this: (1) is there a deployed format that we could use instead of inventing a new one, and (2) if we decide to invent a new one, should we discuss other approaches we rejected? My take: (1) the format used by Apple (mentioned by Lars) assigns a new type for each IMPP URI scheme - that seems to be a bad idea as it doesn't allow clients to uniformly treat different IMPP systems without prior knowledge of what the URI scheme is. So no, the format used by Apple doesn't seem to be a good idea. As for (2), I'd like to avoid that additional work. However I'm open to add minimal text mentioning other approaches if people make a concrete proposal for spec text. Jennings & Reschke Expires March 25, 2007 [Page 7]
Internet-Draft IMPP vCard September 2006 Authors' Addresses 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 Julian F. Reschke (editor) greenbytes GmbH Hafenweg 16 Muenster, NW 48155 Germany Phone: +49 251 2807760 Email: julian.reschke@greenbytes.de Jennings & Reschke Expires March 25, 2007 [Page 8]
Internet-Draft IMPP vCard September 2006 Full Copyright Statement Copyright (C) The Internet Society (2006). 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. 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. Intellectual Property 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. Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Acknowledgment Funding for the RFC Editor function is provided by the IETF Administrative Support Activity (IASA). Jennings & Reschke Expires March 25, 2007 [Page 9]