SIMPLE H. Schulzrinne Internet-Draft Columbia U. Expires: December 1, 2005 May 30, 2005 CIPID: Contact Information in Presence Information Data Format draft-ietf-simple-cipid-04 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 December 1, 2005. Copyright Notice Copyright (C) The Internet Society (2005). Abstract The Presence Information Data Format (PIDF) defines a basic XML format for presenting presence information for a presentity. The Contact Information for 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 Expires December 1, 2005 [Page 1] Internet-Draft CIPID May 2005 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology and Conventions . . . . . . . . . . . . . . . . . 3 3. CIPID Elements . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1 Card Element . . . . . . . . . . . . . . . . . . . . . . . 4 3.2 Display-Name Element . . . . . . . . . . . . . . . . . . . 4 3.3 Homepage Element . . . . . . . . . . . . . . . . . . . . . 4 3.4 Icon Element . . . . . . . . . . . . . . . . . . . . . . . 4 3.5 Map Element . . . . . . . . . . . . . . . . . . . . . . . 4 3.6 Sound Element . . . . . . . . . . . . . . . . . . . . . . 4 4. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5. The XML Schema Definition . . . . . . . . . . . . . . . . . . 5 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6 6.1 URN Sub-Namespace Registration for 'urn:ietf:params:xml:ns:pidf:cipid' . . . . . . . . . . . 6 6.2 Schema Registration for Schema urn:ietf:params:xml:ns:pidf:cipid' . . . . . . . . . . . . 7 7. Security Considerations . . . . . . . . . . . . . . . . . . . 7 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8.1 Normative References . . . . . . . . . . . . . . . . . . . 8 8.2 Informative References . . . . . . . . . . . . . . . . . . 8 Author's Address . . . . . . . . . . . . . . . . . . . . . . . 9 A. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 9 Intellectual Property and Copyright Statements . . . . . . . . 10 Schulzrinne Expires December 1, 2005 [Page 2] Internet-Draft CIPID May 2005 1. Introduction In its function of facilitating communication, the usefulness of presence information 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 [5] XML (Extensible Markup Language) [6] document format. We describe elements for providing a "business card", references to the homepage, map, representative sound, display name and an icon. All elements extend the or, less commonly, element in the presence data model [9]. The element is only extended with CIPID elements if the information describes a service referring to another person that is marked by an RPID element with a value other than 'self'. All elements described in this document are optional. This additional presence information can be used in PIDF [5] documents, together with RPID [7], future-status [8] and other PIDF extensions. The namespace URI for these elements defined by this specification is a URN [2], using the namespace identifier 'ietf' defined by [3] and extended by [4]: urn:ietf:params:xml:ns:pidf:cipid 2. Terminology and Conventions The key words MUST, MUST NOT, REQUIRED, SHOULD, SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL in this document are to be interpreted as described in BCP 14, RFC 2119 [1]. 3. CIPID Elements Some of the elements below refer to content using URIs. If the watcher retrieves the content pointed to by the URI, it may provide hints that it is currently using the presence application. Thus, for increased watcher privacy, a presence application MAY want to cache these objects for later use. Schulzrinne Expires December 1, 2005 [Page 3] Internet-Draft CIPID May 2005 3.1 Card Element The element includes a URI pointing to a business card, e.g., in LDIF [11] or vCard [10] format. 3.2 Display-Name Element The element includes the name identifying the tuple or presentity that the presentity suggests should be shown by the watcher user interface. It is up to watcher user interface to choose whether to heed this suggestion or use some other suitable string. 3.3 Homepage Element The element provides a URI pointing to general information about the tuple or presentity, typically a web home page. 3.4 Icon Element The element provides a URI pointing to an image (icon) representing the tuple or presentity. The watcher MAY use this information to represent the tuple or presentity in a graphical user interface. Presentities SHOULD provide images of sizes and aspect ratios that are appropriate for rendering as an icon. Support for JPEG, PNG and GIF formats is RECOMMENDED. 3.5 Map Element The element provides a URI pointing to a map related to the tuple or presentity. The watcher MAY use this information to represent the tuple or presentity in a graphical user interface. The map may be either an image, an HTML client-side image map or a geographical information system (GIS) document, e.g., encoded as GML. Support for images formatted as PNG and GIF is RECOMMENDED. 3.6 Sound Element The element provides a URI pointing to a sound related to the tuple or presentity. The watcher MAY use the sound object, such as a MIDI or MP3 file, referenced by the URL to inform the watcher that the presentity has assumed the status OPEN. Implementors are advised to create user interfaces that provide the watcher with the opportunity to choose whether to play such sounds. Support for sounds coded as MPEG-2 Layer 3 (MP3) is RECOMMENDED. 4. Example An example combining RPID and CIPID is shown below: Schulzrinne Expires December 1, 2005 [Page 4] Internet-Draft CIPID May 2005 open im:someone@mobile.example.net 2005-05-30T22:00:29Z closed http://example.com/~assistant/card.vcd http://example.com/~assistant im:assistant@example.com 2005-05-30T22:00:29Z http://example.com/~someone/card.vcd http://example.com/~someone http://example.com/~someone/icon.gif http://example.com/~someone/gml-map.xml http://example.com/~someone/whoosh.wav 2005-05-30T22:02:44+05:00 5. The XML Schema Definition The schema is shown below. Schulzrinne Expires December 1, 2005 [Page 5] Internet-Draft CIPID May 2005 Describes CIPID tuple extensions for PIDF. Figure 1: CIPID schema 6. IANA Considerations This document calls for IANA to register a new XML namespace URN and schema per [4]. 6.1 URN Sub-Namespace Registration for 'urn:ietf:params:xml:ns:pidf:cipid' URI: urn:ietf:params:xml:ns:pidf:cipid Description: This is the XML namespace for XML elements defined by RFCXXXX to describe contact information presence information extensions for the status element in the PIDF presence document format in the application/pidf+xml content type. Registrant Contact: IETF, SIMPLE working group, simple@ietf.org; Henning Schulzrinne, hgs@cs.columbia.edu XML: Schulzrinne Expires December 1, 2005 [Page 6] Internet-Draft CIPID May 2005 BEGIN CIPID -- Contact Information in Presence Information Data Format

Namespace for contact information presence extension (status)

urn:ietf:params:xml:ns:pidf:cipid

See RFCXXXX.

END 6.2 Schema Registration for Schema urn:ietf:params:xml:ns:pidf:cipid' URI: please assign Registrant Contact: IESG XML: See Figure 1 7. Security Considerations The security issues are similar to those for RPID [7]. Watchers need to restrict which content types of content pointed to by , , and elements they render. Also, accessing these URIs may in turn provide hints that the watcher is currently using the presence application. Thus, a presence application may want to cache these objects for later use. Icons and other URIs in this document could be used as a covert channel to convey messages to the watcher, outside the content monitoring that might be in place for instant messages or other communications channels. Thus, entities that worry about such channels may want to prohibit the usage of URLs pointing to resources outside their domain, for example. 8. References Schulzrinne Expires December 1, 2005 [Page 7] Internet-Draft CIPID May 2005 8.1 Normative References [1] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [2] Moats, R., "URN Syntax", RFC 2141, May 1997. [3] Moats, R., "A URN Namespace for IETF Documents", RFC 2648, August 1999. [4] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, January 2004. [5] Sugano, H., Fujimoto, S., Klyne, G., Bateman, A., Carr, W., and J. Peterson, "Presence Information Data Format (PIDF)", RFC 3863, August 2004. [6] Yergeau, F., Paoli, J., Sperberg-McQueen, C., Bray, T., and E. Maler, "Extensible Markup Language (XML) 1.0 (Third Edition)", W3C REC REC-xml-20040204, February 2004. 8.2 Informative References [7] Schulzrinne, H., "RPID: Rich Presence: Extensions to the Presence Information Data Format (PIDF)", draft-ietf-simple-rpid-05 (work in progress), February 2005. [8] Schulzrinne, H., "Timed Presence Extensions to the Presence Information Data Format(PIDF) to Indicate Presence Information for Past and Future Time Intervals", draft-ietf-simple-future-02 (work in progress), July 2004. [9] Rosenberg, J., "A Data Model for Presence", draft-ietf-simple-presence-data-model-02 (work in progress), February 2005. [10] Dawson, F. and T. Howes, "vCard MIME Directory Profile", RFC 2426, September 1998. [11] Good, G., "The LDAP Data Interchange Format (LDIF) - Technical Specification", RFC 2849, June 2000. Schulzrinne Expires December 1, 2005 [Page 8] Internet-Draft CIPID May 2005 Author's Address Henning Schulzrinne Columbia University Department of Computer Science 450 Computer Science Building New York, NY 10027 US Phone: +1 212 939 7004 Email: hgs+simple@cs.columbia.edu URI: http://www.cs.columbia.edu Appendix A. Acknowledgments This document is based on the discussions within the IETF SIMPLE working group. Aki Niemi, Vijay Gurbani, Hisham Khartabil, Paul Kyzivat, Eva Leppanen, Mikko Lonnfors, Jon Peterson and Jonathan Rosenberg provided helpful comments. Schulzrinne Expires December 1, 2005 [Page 9] Internet-Draft CIPID May 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. 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. 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. Schulzrinne Expires December 1, 2005 [Page 10]