Internet DRAFT - draft-clearcast-edu-clearcasturn


Internet-Draft                                                  M. Roberts
Intended status: Informational                                   Clearcast
Expires: 14 October 2020                                     14 April 2020 

		Clearcast Identifier URN Namespace definition

   Clearcast Clock Identifiers are used for the unique identification 
   of television advertisement content. 
   This document defines the formal Uniform Resource Name (URN) 
   Namespace Identifier (NID) for Clearcast Identifiers.
Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at

   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."

   This Internet-Draft will expire on 14 October 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text
   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.
1.  Introduction

   This document defines the formal Uniform Resource Name (URN)
   Namespace Identifier (NID) for Clearcast Identifiers.

   Clearcast identifiers are centrally registered, globally unique 
   identifiers for video advertising works and their variants.
   A unique set of metadata parameters describing the associated 
   work is bound to the Clearcast identifier at the time of 

   Clearcast identifiers are a file identifier name (Clock ID) 
   allocated by Clearcast for advertising standards.  

   The following are examples of Clearcast Identifiers for both 
   short and long form clock IDs in their canonical 

   QQQ/AAAA123/030 (short form)	
   QQQ/AAAA12/1800 (long form)		

   The canonical URN representation of the short Clearcast 
   Identifier is:


   Note that "_" is used as separator within the Clearcast 
   Identifier since "/" is a URN reserved character.

   additional background information for Clock ID.

2.  Completed URN Namespace Definition Template

   Declaration of syntactic structure:

   A Clearcast Identifier is a special kind of ID consisting of 
   four components:

   Agency Code
   Product, client or Agency
   Internal Agency Number

   URN-Clearcast = "urn:clearcast:" 
   Clearcast-NSS = CLOCK ID
   Clearcast-AGENCY CODE = QQQ
   Clearcast-DURATION = 030 OR 1800

   Clearcast operates a web service that requires authentication
   and allows the Clearcast Identifier associated to be
   resolved by issuing an HTTP GET request to the following URI

   EXAMPLE: ""

   If the Clearcast Identifier exists, then an XML Schema instance 
   document (see [XMLSchema]) containing metadata associated with 
   the Clearcast Identifier is returned; otherwise, the HTTP status 
   code "404 Not Found" is returned.

   EXAMPLE: ""

   NOTE: At the time of this writing, this service of the ISO 26324 
   Registration Authority is not available over TLS, and hence the 
   confidentiality of queries is not protected.

   Clearcast operates additional services specifically tailored to 
   Clearcast users (see [Clearcast Services]).  
   These services include additional features
   e.g., Copy clearance, subtitling and flash testing.

   Rules for Lexical Equivalence:

   Lexical equivalence of clearcast-URN is defined by 
   case-insensitive string match.

   Conformance with URN Syntax:

   As specified above, the syntax of Clearcast-URN is a subset of the 
   URN syntax specified in [RFC8141].

   Validation mechanism:

   The validity of a clearcast-NSS can only be guaranteed by completing 
   the resolution process.


   Clearcast Identifiers are registered using Copy Central, globally 
   unique identifiers for use with advertising worldwide.

3.  Namespace Considerations

   Clearcast Identifiers are intended for use in Internet applications, 
   where URNs are routinely used to identify television advertising 
   content.  There is no direct mapping from Clearcast Identifiers to 
   existing URN namespaces.

4.  Community Considerations

   The primary registrants of Clearcast Identifiers are Advertising 
   Agencies, Brands, Media Agencies, Post Production and Production 
   companies, metadata aggregators and media companies.
   Clearcast Identifiers can be used by anyone to unambiguously 
   identify an advertising asset and retrieve underlying metadata 
   or connect directly to an API.  The primary benefits of their use 
   are for the Advertising Industry to identify information, metadata 
   and connect with API?s. This can be in the form of TV, Online, and 
   other forms of advertising distribution chains and sources.

5.  IANA Considerations

   IANA has registered the Formal URN Namespace 'clearcast' in the 
   "Uniform Resource Names (URN) Namespaces" registry, using the 
   registration template in Section 2 of this document.

6.  Security Considerations

   This document specifies the syntax of the Clearcast-URN namespace 
   which is implemented via an authenticated API and makes no security 
   representations. Furthermore, the details of assignment and 
   resolution processes are defined external to this document by 
   Clearcast and thus are outside the scope of this document.  
   Note, however, that once authenticated, failure to conform to the 
   criteria for accessing restricted resources can result in gaining 
   unauthorized access to these resources.

7.  References
  7.1.  Normative References

   Moats, R., "URN Syntax", RFC8141, May 1997.

  8.1.  Informative References
   Clearcast Knowledge Base, ?Ad Clock Numbers?

   Clearcast Knowledge Base, ?Ad Clearance Process?

   Daigle, L., van Gulik, D., Iannella, R., and P. Faltstrom,
   "Uniform Resource Names (URN) Namespace Definition
   Mechanisms", BCP 66, RFC 8141, October 2002.
   Fielding, R. and J. Reschke, "Hypertext Transfer Protocol
   (HTTP/1.1): Semantics and Content", RFC 7231, June 2014.

   Holstege, M. and A. Vedamuthu, "W3C XML Schema Definition
   Language (XSD): Component Designators", W3C Candidate
   Recommendation CR-xmlschema-ref-20100119, January 2010,

Author's Address

   Martin Roberts
   Expiration Date: October 2020