Network Working Group P. Lemieux
Internet-Draft Sandflow Consulting LLC
Expires: August 9, 2014 February 5, 2014
Entertainment ID Registry (EIDR) URN Namespace Definition
draft-pal-eidr-urn-00
Abstract
Entertainment ID Registry (EIDR) Identifiers are used for the global
unique identification of motion picture and television content. This
document defines formal Uniform Resource Name (URN) Namespace
Identifier (NID) for EIDR Identifiers.
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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 time of
registration -- see [EIDR-OVERVIEW] and [EIDR-INTRO] for background
information.
2. URN Namespace Definition Template
The following template is provided in accordance with [RFC3406].
Namespace ID:
EIDR
Registration Information:
Version 1
2014-02-04
Declared registrant of the namespace:
Name:
Entertainment ID Registry
Address:
1515 Cordilleras Road.
Redwood City, CA 94062
USA
Contact:
Richard Kroon
E-mail: rkroon@eidr.org
Declaration of syntactic structure:
The URN representation of an EIDR Identifier conforms to the
following syntax (expressed using [RFC2234]):
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URN-EIDR = "URN:EIDR:" EIDR-NSS
EIDR-NSS = DOI-PREFIX ":" DOI-SUFFIX
where DOI-PREFIX and DOI-SUFFIX are DOI Name prefix and suffix,
respectively, translated into canonical NSS format according to
[RFC2141]. DOI Name syntax is specified in [ISO26234].
NOTE: The canonical string representation of an EIDR Identifier
uses "/" instead of ":" as the delimiter between DOI-PREFIX and
DOI-SUFFIX. ":" is used here since "/" is a reserved character.
When DOI-PREFIX is equal to "10.5240", the syntax of DOI-SUFFIX is
further constrained according to [SMPTERP2079] as follows:
DOI-SUFFIX = EIDR-SUFFIX
EIDR-SUFFIX = 5*5(4*4HEXDIG "-") CHECK
DIGIT = %x30-39
HEXDIG = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
ALPHA = %x41-5A / %x61-7A
CHECK = DIGIT / ALPHA
where CHECK is the Mod 37,36 check character as specified in
[ISO7064], computed over the 20 hexadecimal digits HEXDIG of EIDR-
SUFFIX.
EXAMPLE: URN:EIDR:10.5240:68DD-341E-03EE-4BB8-1761-Q
NOTE: Other values DOI-PREFIX might be used for EIDR Identifiers
in the future.
Relevant ancillary documentation:
[ISO26234] specifies DOI Name syntax and registration.
[SMPTERP2079] specifies a specific kind of EIDR Identifier.
Identifier uniqueness considerations:
An EIDR Identifier is a DOI Name. As such, the uniqueness of the
combination of DOI-PREFIX and DOI-SUFFIX, and thus EIDR-NSS, is
guaranteed by the ISO 26324 Registration Authority. A DOI Name is
never reassigned.
Identifier persistence considerations:
As a DOI Name, the persistence of EIDR-NSS is guaranteed by the
ISO 26324 Registration Authority. A DOI Name remains valid
indefinitely.
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Process of identifier assignment:
EIDR-NSS values are assigned by the EIDR organization, which
registers the underlying DOI Name 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 EIDR-NSS is handled by the ISO
26324 Registration Authority.
The ISO 26324 Registration Authority operates a web service that
allows an EIDR-NSS to be resolved by issuing an HTTP GET request
to the following URI:
"http://doi.org/" DOI-PREFIX "/" DOI-SUFFIX
EXAMPLE: http://doi.org/10.5240/68DD-341E-03EE-4BB8-1761-Q
Rules for Lexical Equivalence:
Two EIDR-NSS are equivalent if and only if they are equal. EIDR-
NSS are case-insensitive.
Conformance with URN Syntax:
As specified above, each component of NSS-EIDR, namely DOI-PREFIX
and DOI-SUFFIX, is translated to conform to the URN syntax.
Validation mechanism:
The validity of an EIDR-NSS can only be guaranteed by completing
the resolution process.
For EIDR-NSS with an DOI-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.
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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 only specifies the syntax of the EIDR-URN namespace,
and is therefore security-neutral. The details assignment and
resolution processes are defined external to this document by the
EIDR organization and the ISO 26324 Registration Authority, and thus
outside the scope of this document.
7. References
7.1. Normative References
[RFC2141] Moats, R., "URN Syntax", RFC 2141, May 1997.
[RFC2234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", RFC 2234, November 1997.
[ISO26234]
International Organization for Standardization,
"Information and documentation - Digital object identifier
system", ISO Standard 26324, 2012.
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[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
[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 ID Registry, "EIDR Overview", November 2013,
<http://eidr.org/documents/
2013-11-01_EIDR_Overview_FINAL.pdf>.
[EIDR-INTRO]
Entertainment ID Registry, "EIDR: ID Format Ver. 1.1",
August 2013,
<http://eidr.org/documents/EIDR_ID_Format_v1.1.pdf>.
Author's Address
Pierre-Anthony Lemieux
Sandflow Consulting LLC
Email: pal@sandflow.com
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