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Versions: 00 01 02 03 RFC 7302

Network Working Group                                         P. Lemieux
Internet-Draft                                   Sandflow Consulting LLC
Intended status: Informational                              May 28, 2014
Expires: November 29, 2014


   Entertainment Identifier Registry (EIDR) URN Namespace Definition
                         draft-pal-eidr-urn-03

Abstract

   Entertainment Identifier Registry (EIDR) Identifiers are used for the
   globally unique identification of motion picture and television
   content.  This document defines the formal Uniform Resource Name
   (URN) Namespace Identifier (NID) for EIDR Identifiers.

Status of This Memo

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1.  Introduction

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

   EIDR Identifiers are centrally registered, globally unique
   identifiers for audiovisual works and their variants, primarily film
   and television.  A unique set of metadata parameters describing the
   associated work is bound to the EIDR Identifier at the time of
   registration.

   EIDR Identifiers are a special kind of DOI Names allocated by EIDR
   Association specifically for audiovisual works.  The Digital Object
   Identifier (DOI) system provides an infrastructure for persistent
   unique identification of objects of any type, and is specified in
   [ISO26234].  A DOI name is the identifier that is permanently
   assigned to an object.  The use of DOI Names ensures persistence,
   global uniqueness and an open resolution infrastructure.

   As a DOI Name, an EIDR Identifier has two components: a prefix
   assigned exclusively to EIDR Association by the DOI Registration
   Authority and a suffix defined by EIDR Association.  Currently, EIDR
   Identifiers use the prefix "10.5240", but additional prefixes might
   be introduced in the future.

   The following is an example of an EIDR Identifier in its canonical
   representation:

           10.5240/7791-8534-2C23-9030-8610-5

   where "10.5240" is the prefix and "7791-8534-2C23-9030-8610-5" is the
   suffix.  The canonical URN representation of the same EIDR Identifier
   is:

           urn:eidr:10.5240:7791-8534-2C23-9030-8610-5

   Note that ":" is used as separator between prefix and suffix since
   "/" is a URN reserved character.

   [EIDR-OVERVIEW] and [EIDR-INTRO] provide additional background
   information.

2.  Completed URN Namespace Definition Template

   The namespace definition according to the template in [RFC3406] is as
   follows:

   Namespace ID:



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      EIDR

   Registration Information:

      Version 1

      2014-03-03

   Declared registrant of the namespace:

      Name:

         Entertainment Identifier Registry Association

      Address:

         c/o Alliances Management
         544 Hillside Road
         Redwood City, CA 94062
         USA

      Contact:

         URL: http://eidr.org/contact/
         E-mail: info@eidr.org

   Declaration of syntactic structure:

      An EIDR Identifier is a special kind of DOI Name (see [ISO26234])
      and, as such, consists of two components: a prefix denoted EIDR-
      PREFIX and a suffix denoted EIDR-SUFFIX.  The URN representation
      URN-EIDR of an EIDR Identifier conforms to the syntax (expressed
      using [RFC5234]):

           URN-EIDR = "urn:eidr:" EIDR-NSS
           EIDR-NSS = EIDR-PREFIX ":" EIDR-SUFFIX
           EIDR-PREFIX = 1*EIDR-CHARS
           EIDR-SUFFIX = 1*EIDR-CHARS
           EIDR-CHARS = ALPHA / DIGIT / "-" / "." / "_"


      The only value of EIDR-PREFIX currently in use is "10.5240".
      Additional prefix values conforming to the EIDR-PREFIX syntax
      might be introduced by EIDR Association in the future.  Each of
      these additional prefix values will in all cases be associated
      with suffix values that conform to a subset of the EIDR-SUFFIX
      syntax.  These additional prefixes and their corresponding




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      suffixes will be documented in future revisions to this
      registration.

      An implementation can process an EIDR-NSS with an unknown prefix
      as an opaque string per the Section "rules of lexical
      equivalence", and resolve it as a generic DOI Name per the
      Section "process for identifier resolution".

      When EIDR-PREFIX is equal to "10.5240", the syntax of EIDR-SUFFIX
      is further constrained according to the to RP2079-SUFFIX syntax
      specified in [SMPTERP2079]:

           RP2079-SUFFIX = 5(4HEXDIG "-") CHECK
           CHECK         = DIGIT / ALPHA

      where CHECK is the Mod 37,36 check character as specified in
      [ISO7064], computed over the 20 hexadecimal digits HEXDIG of
      RP2079-SUFFIX.

      EXAMPLE: urn:eidr:10.5240:7791-8534-2C23-9030-8610-5

   Relevant ancillary documentation:

      [ISO26234] specifies DOI Name syntax and registration.

      [SMPTERP2079] specifies the syntax of EIDR Identifier with the
      prefix "10.5240".

   Identifier uniqueness considerations:

      An EIDR Identifier is a DOI Name.  The ISO 26324 Registration
      Authority ensures that DOI Name uniqueness, therefore the URN-EIDR
      derived from an EIDR Identifier is guaranteed unique and never
      reassigned.

      Furthermore, an EIDR Identifier is associated with a single URN-
      EIDR.

   Identifier persistence considerations:

      An EIDR Identifier is a DOI Name.  The ISO 26324 Registration
      Authority ensures that a DOI Name remains valid indefinitely,
      therefore the URN-EIDR derived from an EIDR Identifier remains
      valid indefinitely.

   Process of identifier assignment:





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      The EIDR Association registers each EIDR Identifier with the ISO
      26324 Registration Authority.

      Entities involved in the motion picture and television industry,
      either directly in the production of content or in its
      distribution and related services, are eligible to apply for
      registrant status.  Registrants pay an annual membership fee that
      depends on the size of the company.

   Process for identifier resolution:

      As a DOI Name, the resolution of the EIDR Identifier associated
      with an EIDR-NSS is handled by the ISO 26324 Registration
      Authority.

      The ISO 26324 Registration Authority operates a web service that
      allows the EIDR Identifier associated with an EIDR-NSS to be
      resolved by issuing an HTTP GET request to the following URI (see
      [RFC2616]):

               "http://doi.org/" EIDR-PREFIX "/" EIDR-SUFFIX

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

      EXAMPLE: http://doi.org/10.5240/7791-8534-2C23-9030-8610-5

      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.

      The EIDR Association operates additional services specifically
      tailored to EIDR users (see [EIDR-SERVICES]).  These services
      include additional features, e.g. confidential lookup using TLS
      and the ability to register EIDR Identifiers.

   Rules for Lexical Equivalence:

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

   Conformance with URN Syntax:

      As specified above, the syntax of EIDR-URN is a subset of the URN
      syntax specified in [RFC2141].




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   Validation mechanism:

      The validity of an EIDR-NSS can only be guaranteed by completing
      the resolution process.

      For EIDR-NSS with an EIDR-PREFIX equal to "10.5240", the CHECK
      value can be used for integrity checking, as specified above.

   Scope:

      EIDR Identifiers are centrally registered, globally unique
      identifiers for use with audiovisual works worldwide.

3.  Namespace Considerations

   EIDR Identifiers are intended for use in Internet applications, where
   URNs are routinely used to identify audiovisual resources.  There is
   no direct mapping from EIDR Identifiers to existing URN namepsaces.

4.  Community Considerations

   The primary registrants of EIDR Identifiers are producers and
   distributors of audiovisual works, metadata aggregators, and
   audiovisual archives.  Any bona fide member of the ecosystem can
   become an EIDR member and register any work.  EIDR identifiers can be
   used by anyone to unambiguously identify an audiovisual asset and
   retrieve underlying metadata.  The primary benefits of its use are
   associated with works in wide distribution, management of long or
   complex distribution chains, and aggregation of information from
   multiple sources.

5.  IANA Considerations

   This document defines a URN NID registration that is to be entered
   into the IANA registry of URN NIDs.  It specifically requests the
   EIDR NID.

6.  Security Considerations

   This document specifies the syntax of the EIDR-URN namespace and
   makes no security representations.  Furthermore, the details of
   assignment and resolution processes are defined external to this
   document by the EIDR Association and the ISO 26324 Registration
   Authority, and thus outside the scope of this document.  Note however
   that failure to conform to the syntactic and lexical equivalence
   rules specified in this specification when using an EIDR Identifier
   as a criteria for accessing restricted resources can result in
   granting unauthorized access to these resources.



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7.  References

7.1.  Normative References

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

   [RFC5234]  Crocker, D. and P. Overell, "Augmented BNF for Syntax
              Specifications: ABNF", STD 68, RFC 5234, January 2008.

   [ISO26234]
              International Organization for Standardization,
              "Information and documentation - Digital object identifier
              system", ISO Standard 26324, 2012.

   [ISO7064]  International Organization for Standardization,
              "Information technology - Security techniques - Check
              character systems", ISO Standard 7064, 2003.

   [SMPTERP2079]
              Society of Motion Picture and Television Engineers,
              "Digital Object Identifier (DOI) Name and Entertainment ID
              Registry (EIDR) Identifier Representations", SMPTE RP
              2079, 2014.

7.2.  Informative References

   [XMLSchema]
              Holstege, M. and A. Vedamuthu, "W3C XML Schema Definition
              Language (XSD): Component Designators", World Wide Web
              Consortium CR CR-xmlschema-ref-20100119, January 2010,
              <http://www.w3.org/TR/2010/CR-xmlschema-ref-20100119>.

   [RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,
              Masinter, L., Leach, P., and T. Berners-Lee, "Hypertext
              Transfer Protocol -- HTTP/1.1", RFC 2616, June 1999.

   [RFC3406]  Daigle, L., van Gulik, D., Iannella, R., and P. Faltstrom,
              "Uniform Resource Names (URN) Namespace Definition
              Mechanisms", BCP 66, RFC 3406, October 2002.

   [EIDR-OVERVIEW]
              Entertainment Identifier Registry Association, "EIDR
              Overview", November 2013, <http://eidr.org/
              documents/2013-11-01_EIDR_Overview_FINAL.pdf>.







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   [EIDR-INTRO]
              Entertainment Identifier Registry Association, "EIDR: ID
              Format Ver. 1.1", August 2013,
              <http://eidr.org/documents/EIDR_ID_Format_v1.1.pdf>.

   [EIDR-SERVICES]
              Entertainment Identifier Registry Association, "EIDR
              System Version 2.0: Registry User's Guide", August 2013,
              <http://eidr.org/documents/
              EIDR_2.0_Registry_User_Guide.pdf>.

Author's Address

   Pierre-Anthony Lemieux
   Sandflow Consulting LLC

   Email: pal@sandflow.com


































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