Entertainment ID Registry (EIDR) URN Namespace Definition

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 and for background information.

The following template is provided in accordance with . 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 94062USA Contact: Richard KroonE-mail: rkroon@eidr.org Declaration of syntactic structure: The URN representation of an EIDR Identifier conforms to the following syntax (expressed using ):

where DOI-PREFIX and DOI-SUFFIX are DOI Name prefix and suffix, respectively, translated into canonical NSS format according to . DOI Name syntax is specified in . 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 as follows:

where CHECK is the Mod 37,36 check character as specified in , 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: specifies DOI Name syntax and registration. 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. 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.

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.

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.

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.

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.