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Network Working Group M. Dolan
Request for Comments: 4246 TBT
Category: Informational February 2006
International Standard Audiovisual Number (ISAN) URN Definition
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 (2006).
Abstract
The International Standard Audiovisual Number (ISAN) is a standard
numbering system for the unique and international identification of
audiovisual works. This document is the definition of the formal
Uniform Resource Name (URN) Namespace Identifier (NID) for ISAN.
Table of Contents
1. Introduction ....................................................2
2. URN Namespace Definition Template ...............................2
3. Formal Syntax ...................................................4
4. Security Considerations .........................................4
5. Namespace Considerations ........................................4
6. Community Considerations ........................................4
7. IANA Considerations .............................................5
8. References ......................................................5
8.1. Normative References .......................................5
8.2. Informative References .....................................5
Dolan Informational [Page 1]
RFC 4246 ISAN URN Definition February 2006 1. Introduction This document is the definition of the formal Uniform Resource Name (URN) Namespace Identifier (NID) for ISAN. 2. URN Namespace Definition Template The following template is provided in accordance with [RFC3406]. Namespace ID: ISAN Registration Information: Version: 1 Date: 2004 11 22 Declared registrant of the namespace: Name: ISAN International Agency Address: 26 rue de St Jean, CH-1203 Geneva, Switzerland Contact: Mr. Patrick Attallah, Managing Director Declaration of structure: The identifier structure is as follows: URN:ISAN:<ISAN-NSS> Where ISAN-NSS is conformant to URN syntax requirements defined in [RFC2141] and is further constrained by [ISO15706] and in this document. There are two forms, one with the version extension and one without. The formal BNF is defined in section 2 below. Examples of the two forms are: URN:ISAN:0123-1230-3210-2310-1 URN:ISAN:1881-66C7-3420-6541-9-9F3A-0245-U Relevant ancillary documentation: ISAN, its syntax, uses and its processes are defined in [ISO15706]. Dolan Informational [Page 2]
RFC 4246 ISAN URN Definition February 2006 Identifier uniqueness considerations: Uniqueness is guaranteed by the ISAN International Agency that issues the numbers. Numbers are not re-assigned. Identifier persistence considerations: Persistence is guaranteed by ISO Registration Authority processes and contracts with the ISAN International Agency. Process of identifier assignment: The details of the assignment process are defined from time to time by the ISAN International Agency. However, in general, any approved entity can request an ISAN number by providing the required metadata information and paying the registration fee. The ISAN International Agency may delegate to regional or market- based Registration Agencies for portions of the registration process. Process for identifier resolution: ISAN numbers are resolved by a direct or indirect lookup with the ISAN International Agency. At this writing, a non-commercial, manual system is available online at http://www.isan.org. The resolution procedures may be modified from time to time by the ISAN International Agency. Rules for Lexical Equivalence: The ISAN-NSS is unique by the nature of the ISAN International Agency's number management. The ISAN-NSS is case-insensitive. Upper and lower case characters are treated as identical. Conformance with URN Syntax: No special considerations. The syntax is fully conformant with [RFC2141]. Validation mechanism: The check digits provide syntax integrity. Lookup is via online and offline services provided by the ISAN International Agency. Scope: Global. Dolan Informational [Page 3]
RFC 4246 ISAN URN Definition February 2006 3. Formal Syntax The following syntax specification uses an augmented Backus-Naur Form (BNF) and elements defined in the URN Syntax [RFC2141]. This syntax here is derived from the syntax definition in [ISO15706], constrained to prohibit the space character as a separator. <ISAN-NSS> ::= <root> <episode> [version] <root> ::= 3*(<hexnum> "-") <episode> ::= <hexnum> "-" <check> <version> ::= 2*("-" <hexnum>) "-" <check> <hexnum> ::= 4*(<hex>) <check> ::= <upper> | <lower> | <number> Note that <hex>, <upper>, <lower>, and <number> are defined in [RFC2141]. 4. Security Considerations This document only defines the syntax and resolution authority for the ISAN numbers. Details of the resolution process and the security of the assignment and resolution system processes are defined external to this document by the ISAN International Agency and thus outside the scope of this document. 5. Namespace Considerations ISAN is an external numbering system managed by an external agency established by ISO. While URN namespaces may exist for which any generic numbering system can be encoded, there is currently no direct encoding for ISAN. An example of such a namespace is the MPEG-21 system. ISAN numbers are reserved for use in identifying audiovisual works for which there is a moving visual component, or components related to such a work (e.g. subtitling track). 6. Community Considerations The primary registrants for ISAN numbers are the producers and studios of audiovisual works (movies and television shows). While the system is not constrained to "major" works (any bona fide entity can register any work), the primary benefits of its use come from Dolan Informational [Page 4]
RFC 4246 ISAN URN Definition February 2006 works that are widely distributed. The users of the ISAN system range from the studios themselves to film and video archives and libraries, rights administrators, program guide services, and audience measurement services. Its potential for use in the Internet community is as an identifier for streaming media. 7. IANA Considerations This document defines a URN NID registration that is to be entered into the IANA registry of URN NIDs. It specifically requests the NID, "ISAN". 8. References 8.1. Normative References [RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997. [ISO15706] ISO 15706, Information and documentation - International Standard Audiovisual Number (ISAN) 8.2. Informative References [RFC3406] Daigle, L., van Gulik, D., Iannella, R., and P. Faltstrom, "Uniform Resource Names (URN) Namespace Definition Mechanisms", BCP 66, RFC 3406, October 2002. Author's Address Michael Dolan TBT PO Box 190 Del Mar, CA 92014 USA EMail: md.1@newtbt.com Dolan Informational [Page 5]
RFC 4246 ISAN URN Definition February 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. Acknowledgement Funding for the RFC Editor function is provided by the IETF Administrative Support Activity (IASA). Dolan Informational [Page 6]