The TV-Anytime Content Reference Identifier (CRID)
RFC 4078

 
Document Type RFC - Informational (May 2005; No errata)
Was draft-earnshaw-tv-anytime-crid (individual in tsv area)
Last updated 2013-03-02
Stream IETF
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IESG IESG state RFC 4078 (Informational)
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Responsible AD Jon Peterson
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Network Working Group                                        N. Earnshaw
Request for Comments: 4078                  BBC Research and Development
Category: Informational                                          S. Aoki
                                                    TokyoFM Broadcasting
                                                               A. Ashley
                                                             NDS Limited
                                                             W. Kameyama
                                                 GITS, Waseda University
                                                                May 2005

           The TV-Anytime Content Reference Identifier (CRID)

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

   The Uniform Resource Locator (URL) scheme "CRID:" has been devised to
   allow references to current or future scheduled publications of
   broadcast media content over television distribution platforms and
   the Internet.

   The initial intended application is as an embedded link within
   scheduled programme description metadata that can be used by the home
   user or agent to associate a programme selection with the
   corresponding programme location information for subsequent automatic
   acquisition.

   This document reproduces the TV-Anytime CRID definition found in the
   TV-Anytime content referencing specification, and is published as an
   RFC for ease of access and registration with the Internet Assigned
   Numbers Authority (IANA).

Earnshaw, et al.             Informational                      [Page 1]
RFC 4078                    TV-Anytime CRID                     May 2005

Table of Contents

   1. Introduction ....................................................2
   2. Ancestry ........................................................3
   3. Notation Used in This Document ..................................3
   4. The CRID URL Scheme .............................................3
   5. Examples of CRID Syntax .........................................4
   6. Usage ...........................................................4
      6.1. Normative Specification ....................................4
      6.2. Role of Domain Name System (DNS) Namespace .................5
      6.3. CRID Resolving .............................................5
      6.4. CRID Related Metadata ......................................5
   7. IANA Considerations .............................................6
      7.1. General ....................................................6
      7.2. Registration Template in Accordance with RFC 2717 ..........6
   8. Security Considerations .........................................7
   9. Acknowledgements ................................................7
   10. References .....................................................8
       10.1. Normative References .....................................8
       10.2. Informative References ...................................8

1.  Introduction

   In recent years there has been an expansion in the number of
   broadcast television and radio services available to the home.  In
   addition to the broadcast services delivered over traditional
   distribution channels such as Digital Terrestrial, Satellite and
   Cable, the advent of high-speed Internet connection will give rise to
   even more information and entertainment services, providing audio-
   visual programme material sourced directly to the home over the
   Internet.

   Alongside this expansion there has also been increased growth in
   complexity of devices available to the home user, which will allow
   the user to operate in a 'search-select-acquire' paradigm.  In this
   model, the user or user agent uses descriptive information about
   audio visual programmes as a basis for selecting the programme for
   subsequent acquisition and viewing.  Increasingly, home appliances
   are being furnished with local storage, enabling the automatic
   capture of programme material through off-air recording or
   downloading by a home appliance.

   The 'CRID:' Uniform Resource Locator is designed to be the bridge
   between programme-related descriptive metadata and corresponding
   programme location data that may be published over a different
   distribution network or at a different time.

Earnshaw, et al.             Informational                      [Page 2]
RFC 4078                    TV-Anytime CRID                     May 2005

   Programme location data provides the home user agent with the
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