INTERNET-DRAFT J. Smith Network Working Group IBM T. J. Watson Research Center Expires: May 20, 2002 November 20, 2001 A URN Namespace for MPEG draft-smith-urn-mpeg-00.txt Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. 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 expires on May 20, 2002. Copyright Notice Copyright (C) The Internet Society (2001). All Rights Reserved. Abstract This document describes a Uniform Resource Name (URN) namespace for the Motion Picture Experts Group (MPEG) for naming persistent resources as part of the MPEG standards. Example resources include technical documents and specifications, eXtensible Markup Language (XML) Schemas, classification schemes, XML Document Type Definitions (DTDs), namespaces, style sheets, media assets, and other types of resources produced or managed by MPEG. Smith Expires: May 20, 2002 [Page 1] INTERNET-DRAFT A URN Namespace for MPEG November 2001 1. Introduction MPEG is a working group of the International Organization for Standardization (ISO) and International Engineering Consortium (IEC) in charge of the development of standards for coded representation of digital audio and video. MPEG has produced MPEG-1, the standard on which such products as Video CD and MP3 are based, MPEG-2, the standard on which such products as Digital Television set top boxes and DVD are based, MPEG-4, the standard for multimedia for the fixed and mobile web, and MPEG-7 "Multimedia Content Description Interface," the standard for description and search of audio and visual content. Work on MPEG-21 "Multimedia Framework" is currently underway. MPEG would like to assign unique, permanent, location-independent names based on URNs for some resources it produces or manages. This namespace specification is for a formal namespace. 2. Specification Template Namespace ID: "mpeg" requested. Registration Information: Version: 1 Date: 2001-11-20 Declared registrant of the namespace: Name: John R. Smith Title: Chair, MPEG MDS Subgroup Affiliation: IBM T. J. Watson Research Center Address: 30 Saw Mill River Road Hawthorne, NY 10532 USA Phone: +1 (914) 784-7320 Email: jrsmith@watson.ibm.com Smith Expires: May 20, 2002 [Page 2] INTERNET-DRAFT A URN Namespace for MPEG November 2001 Declaration of structure: URNs assigned by MPEG will have the following hierarchical structure based on the organizational structure of the MPEG standards: urn:mpeg:{standard name}:{assigned US-ASCII string} where "{standard name}" is a US-ASCII string that conforms to URN Syntax requirements ([RFC2141]) and corresponds to the name of an MPEG standard (such as "mpeg1", "mpeg2", "mpeg4", "mpeg7", "mpeg21", and "{assigned US-ASCII string}" is a US-ASCII string that conforms to URN Syntax requirements ([RFC2141]). The individual URNs shall be assigned by MPEG through the process of development of MPEG standards. Relevant ancillary documentation: None Identifier uniqueness considerations: MPEG shall establish unique identifiers as appropriate. Uniqueness is guaranteed as long as the assigned string is never reassigned for a given standard name and that the standard name is never reassigned. Identifier persistence considerations: MPEG is committed to maintaining the accessibility and persistence of all resources that are officially assigned URNs by the organization. Persistence of identifiers is dependent upon suitable delegation of resolution at the level of "standard name"s, and persistence of standard name assignment. Process of identifier assignment: Assignment is limited to the owner and those authorities that are specifically designated by the owner. MPEG may designate portions of its namespace for assignment by other parties. Smith Expires: May 20, 2002 [Page 3] INTERNET-DRAFT A URN Namespace for MPEG November 2001 Process of identifier resolution: The owner will develop and maintain "URN catalogs" that map all assigned URNs to Uniform Resource Locators (URLs) specifically to enable Web-based resolution of named resources. In the future an interactive online resolution system may be developed to automate this process. The owner will authorize additional resolution services as appropriate. Rules for Lexical Equivalence: The "standard name" is case-insensitive. Thus, the portion of the URN: urn:mpeg:{standard name}: is case-insensitive for matches. The remainder of the identifier must be considered case-sensitive. Conformance with URN Syntax: No special considerations. Validation mechanism: None specified. The owner will develop and maintain URN catalogs. The presence of a URN in a catalog indicates that it is valid. Scope: Global 3. Examples The following examples are not guaranteed to be real. They are presented for pedagogical reasons only. urn:mpeg:mpeg7:schema:2001 urn:mpeg:mpeg7:cs:VideoDomainCS:2001 urn:mpeg:mpeg7:cs:GenreCS:2001 urn:mpeg:mpeg7:cs:ContentCS:2001 Smith Expires: May 20, 2002 [Page 4] INTERNET-DRAFT A URN Namespace for MPEG November 2001 4. Security Considerations There are no additional security considerations other than those normally associated with the use and resolution of URNs in general. References [RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997 Author Address John R. Smith IBM T. J. Watson Research Center 30 Saw Mill River Road Hawthorne, NY 10532 USA Phone: 1 (914) 784-7320 EMail: jrsmith@watson.ibm.com Smith Expires: May 20, 2002 [Page 5] INTERNET-DRAFT A URN Namespace for MPEG November 2001 Full Copyright Statement Copyright (C) The Internet Society (2001). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS 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. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society. Expiration date: May 20, 2002 Smith Expires: May 20, 2002 [Page 6]