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+Network Working Group J. Smith
+Request for Comments: 3614 IBM T. J. Watson Research Center
+Category: Informational September 2003
+
+
+ A Uniform Resource Name (URN) Namespace for the
+ Motion Picture Experts Group (MPEG)
+
+Status of this Memo
+
+ This memo provides information for the Internet community. It does
+ not specify an Internet standard of any kind. Distribution of this
+ memo is unlimited.
+
+Copyright Notice
+
+ Copyright (C) The Internet Society (2003). 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.
+
+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.
+
+
+
+
+
+Smith Informational [Page 1]
+
+RFC 3614 URN Namespace for MPEG September 2003
+
+
+2. Specification Template
+
+ Namespace ID:
+
+ "mpeg"
+
+ 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
+
+ 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.
+
+
+
+
+Smith Informational [Page 2]
+
+RFC 3614 URN Namespace for MPEG September 2003
+
+
+ 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.
+
+ 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.
+
+
+
+Smith Informational [Page 3]
+
+RFC 3614 URN Namespace for MPEG September 2003
+
+
+ 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
+
+4. Namespace Considerations
+
+ URN assignment procedures:
+
+ The individual URNs shall be assigned through the process of
+ development of MPEG standards by the Moving Picture Experts Group
+ (MPEG), which is a working group of ISO/IEC.
+
+ URN resolution/delegation:
+
+ The resolution and delegation shall be determined through the
+ process of development of MPEG standards by the Moving Picture
+ Experts Group (MPEG). MPEG has developed requests for
+ registration authority for MPEG-7 classification schemes and
+ MPEG-21 identification systems. These registration authorities
+ shall be responsible for corresponding parts of MPEG namespace.
+
+ Type of resources to be identified:
+
+ Types of resources to be identified include XML schema definition
+ files, classification schemes, identification systems.
+
+ Type of services to be supported:
+
+ Types of services supported include controlled term lookup in
+ classification schemes, resolution of ids in identification
+ systems.
+
+
+
+
+
+
+
+
+Smith Informational [Page 4]
+
+RFC 3614 URN Namespace for MPEG September 2003
+
+
+5. Community Considerations
+
+ Open assignment and use of identifiers within the namespace:
+
+ With on-going development of MPEG standards, MPEG shall establish
+ requirements for assignment and use of identifiers within MPEG
+ namespace. MPEG has already established requirements for
+ assignment and use of MPEG-7 classification schemes under MPEG
+ namespace. A registration authority shall have the responsibility
+ for processing third party requests for registering classification
+ schemes.
+
+ Open operation of resolution servers for the namespace (server):
+
+ With on-going development of MPEG standards, MPEG shall establish
+ requirements and seek candidates for operating resolution servers
+ as appropriate.
+
+ Creation of software that can meaningfully resolve and access
+ services for the namespace (client):
+
+ With on-going development of MPEG standards, MPEG shall develop
+ reference software implementations of its standards.
+
+6. Security Considerations
+
+ There are no additional security considerations other than those
+ normally associated with the use and resolution of URNs in general.
+
+7. IANA Considerations
+
+ The IANA has registered formal URN namespace 12, to MPEG within the
+ IANA registry of URN NIDs.
+
+8. Normative References
+
+ [RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997.
+
+9. Author's 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 Informational [Page 5]
+
+RFC 3614 URN Namespace for MPEG September 2003
+
+
+10. Full Copyright Statement
+
+ Copyright (C) The Internet Society (2003). 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 assignees.
+
+ 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.
+
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+Smith Informational [Page 6]
+