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rfc:rfc4195

Network Working Group W. Kameyama Request for Comments: 4195 GITS, Waseda University Category: Informational October 2005

  A Uniform Resource Name (URN) Namespace for the TV-Anytime Forum

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 (2005).

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 (i.e.,
 specifications, working documents, and schemas) that are 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.

Kameyama Informational [Page 1] RFC 4195 A URN Namespace for the TV-Anytime Forum October 2005

2. Specification Template

 Namespace ID:
    "tva"
 Registration information:
    Registration Version Number: 1
    Registration Date: 2005-1-6
 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
    Telecommunication Standardization Institute) technical
    specification documents, ETSI TS 102 822 series.
 Identifier uniqueness considerations:
    The TV-Anytime Forum shall establish unique identifiers as
    appropriate.

Kameyama Informational [Page 2] RFC 4195 A URN Namespace for the TV-Anytime Forum October 2005

    Uniqueness is guaranteed as long as the assigned "{category}" is
    never reassigned for other 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; hence, 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
    "{category}".
 Scope:
    Global.

Kameyama Informational [Page 3] RFC 4195 A URN Namespace for the TV-Anytime Forum October 2005

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. Community Considerations

 The names in this namespace are to be used in any public
 implementations of the TV-Anytime Forum specifications so that
 anybody can benefit from the officially assigned namespace.
 Potential beneficiary communities include:
 a) Implementers of the TV-Anytime specifications.
    Resources that comply with the TV-Anytime Forum specifications
    (including TV-Anytime schemas, instance documents that comply with
    TV-Anytime schemas, and TV-Anytime default Classification Schemes)
    may, by means of the registered namespace, become exposed to the
    general Internet and gain from the interoperability benefits of
    the Internet at large.
 b) Implementers of other specifications that incorporate components
    of the TV-Anytime specifications.
    URNs used to identify TV-Anytime components may be used to enable
    their inclusion in, and enhancement of, other specifications while
    maintaining, to a certain degree, interoperability with the TV-
    Anytime community (see a) above).
 c) Implementers of other semantically related specifications that do
    not directly incorporate components of the TV-Anytime
    specifications.
    URNs used to identify components of the TV-Anytime specifications,
    such as identifiers of terms within default Classification
    Schemes, may enable interoperation with other semantically
    determined specifications (including present and future
    metadata/resource description and ontology specifications) of
    relevance to TV-Anytime implementation communities (see a) and b)
    above).

Kameyama Informational [Page 4] RFC 4195 A URN Namespace for the TV-Anytime Forum October 2005

5. Namespace Considerations

 This application requires a unique namespace because the assignment
 mechanism requires delegation to the TV-Anytime Forum.  As a
 namespace used to identify components of the TV-Anytime
 specifications, the TV-Anytime Forum will manage the inter-
 relationship of the components and the uniqueness of the identifiers.

6. Security Considerations

 There are no additional security considerations other than those
 normally associated with the use and resolution of URNs in general.

Informative References

 [RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997.

Author's 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

Kameyama Informational [Page 5] RFC 4195 A URN Namespace for the TV-Anytime Forum October 2005

Full Copyright Statement

 Copyright (C) The Internet Society (2005).
 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 currently provided by the
 Internet Society.

Kameyama Informational [Page 6]

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