Network Working Group W. Kameyama Internet-Draft GITS, Waseda University Expires: January 16, 2004 July 17, 2003 A URN Namespace for the TV-Anytime Forum draft-kameyama-tv-anytime-urn-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 January 16, 2004. Copyright Notice Copyright (C) The Internet Society (2003). All Rights Reserved. Abstract This document describes a Uniform Resource Name (URN) namespace that is engineered by the TV-Anytime Forum for naming persistent resources published by the TV-Anytime Forum including the TV-Anytime Forum Standards, XML (Extensible Markup Language) Document Type Definitions, XML Schemas, Namespaces, and other documents. 1. Introduction The TV-Anytime Forum produces many kinds of documents: Kameyama Expires: January 16, 2004 [Page 1] INTERNET-DRAFT A URN Namespace for the TV-Anytime Forum July 2003 specifications, working documents, schemas, etc. that currently being considered for adoption by many standardization bodies such as ETSI (European Telecommunication Standardization Institute), DVB (Digital Video Broadcasting), ARIB (Association of Radio Industries and Businesses) and ATSC (Advance Television Systems Committee). The TV-Anytime Forum wishes to provide global, distributed, persistent, location-independent names for these resources. 2. Specification Template Namespace ID: "tva" requested. Registration information: Registration Version Number: 1 Registration Date: 2003-07-17 Declared registrant of the namespace: Name: Wataru KAMEYAMA Title: Vice Chairman and Secretary, The TV-Anytime Forum Affiliation: Graduate School of Global Information and Telecommunication Studies, Waseda University Address: 1-3-10 Nishi-Waseda, Shinjuku-ku, Tokyo 169-0051, JAPAN Phone: +81 3 5286 9852 Email: wataru@waseda.jp Declaration of structure: The Namespace Specific String (NSS) of all URNs assigned by the TV-Anytime Forum will have the following hierarchical structure: urn:tva:{category}:{string} where the "category" is a US-ASCII string that conforms to URN syntax requirements ([RFC2141]), and "{string}" is a string that confirms to URN syntax requirements ([RFC2141]). Relevant ancillary documentation: The TV-Anytime Forum specifications have been publicly available at all stages during their development from "ftp://tva:tva@ftp.bbc.co.uk/Specifications/". The final specifications are now available as formal ETSI (European Kameyama Expires: January 16, 2004 [Page 2] INTERNET-DRAFT A URN Namespace for the TV-Anytime Forum July 2003 Telecommunication Standardization Institute) technical specification document, ETSI TS 102 822. Identifier uniqueness considerations: The TV-Anytime Forum shall establish unique identifiers as appropriate. Uniqueness is guaranteed as long as the assigned "{category}" is never reassigned for another categories. The TV-Anytime Forum is responsible for this. Identifier persistence considerations: The TV-Anytime Forum 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 at the level of "category"s, and persistence of category assignment. Process of identifier assignment: All the assignments of identifiers are fully controlled and managed by the TV-Anytime Forum. Process of identifier resolution: The namespace is not listed with an RDS; this is not relevant. Rules for Lexical Equivalence: The "{category}" is case-insensitive. Thus, the portion of the URN: urn:tva:{category}: is case-insensitive for matches. The remainder of the identifier shall be considered case-sensitive, and so URNs are only lexically equivalent if they are also lexically identical in the remaining {string} field. Conformance with URN Syntax: No special considerations. Validation mechanism: Validation shall be done by a syntax grammar corresponding to each Kameyama Expires: January 16, 2004 [Page 3] INTERNET-DRAFT A URN Namespace for the TV-Anytime Forum July 2003 "{category}". Scope: Global. 3. Examples The following examples are not guaranteed to be real. They are provided for pedagogical reasons only. urn:tva:metadata:2002 urn:tva:metadata:cs:IntentionCS:2002 urn:tva:metadata:cs:ActionTypeCS:2002 urn:tva:rmp:tvax 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 Wataru KAMEYAMA 1-3-10 Nishi-Waseda, Shinjuku-ku, Tokyo, 169-0051, JAPAN Phone: +81 3 5286 9852 Email: wataru@waseda.jp Kameyama Expires: January 16, 2004 [Page 4]