Network Working Group W. Kameyama
Internet-Draft GITS, Waseda University
Expires: October 22, 2004 April 23, 2004
A URN Namespace for the TV-Anytime Forum
draft-kameyama-tv-anytime-urn-01.txt
Status of this Memo
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Copyright Notice
Copyright (C) The Internet Society (2004). 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:
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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: 2004-04-23
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: 1011 Okuboyama, Nishi-tomida, Honjo-shi, Saitama
367-0035, JAPAN
Phone: +81 495 24 6052
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 also available as formal ETSI (European
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Telecommunication Standardization Institute) technical
specification documents, ETSI TS 102 822 series.
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
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"{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
GITS, Waseda University
1011 Okuboyama, Nishi-tomida, Honjo-shi, Saitama, 367-0035, JAPAN
Phone: +81 495 24 6052
Email: wataru@waseda.jp
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