Paskin, N.: Identifier interoperability : a report on two recent ISO activities (2006)
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- Abstract
- Two significant activities within ISO, the International Organisation for Standardization, are underway, each of which has potential implications for the management of content by digital libraries and their users. Moreover these two activities are complementary and have the potential to provide tools for significantly improved identifier interoperability. This article presents a report on these: the first activity investigates the practical implications of interoperability across the family of ISO TC46/SC9 identifiers (better known as the ISBN and related identifiers); the second activity is the implementation of an ontology-based data dictionary that could provide a mechanism for this, the ISO/IEC 21000-6 standard. ISO/TC 46 is the ISO Technical Committee responsible for standards of "Information and documentation". Subcommittee 9 (SC9) of that body is responsible for "Presentation, identification and description of documents": the standards that it manages are identifiers familiar to the content and digital library communities, including the International Standard Book Number (ISBN); International Standard Serial Number (ISSN); International Standard Recording Code (ISRC); International Standard Music Number (ISMN); International Standard Audio-visual Number (ISAN) and the related Version identifier for Audio-visual Works (V-ISAN); and the International Standard Musical Work Code (ISWC). Most recently ISO has introduced the International Standard Text Code (ISTC), and is about to consider standardisation of the DOI system. The ISO identifier schemes provide numbering schemes as labels of entities of "content": many of the identifiers have as referents abstract content entities ("works" rather than a specific physical or digital form: e.g., ISAN, ISWC, ISTC). The existing schemes are numbering management schemes, not tied to any specific implementation (hence for internet "actionability", these identifiers may be incorporated into URN, URI, or DOI formats, etc.). Recently SC9 has requested that new and revised identifier schemes specify mandatory structured metadata to specify the item identified; that metadata is now becoming key to interoperability.
Section 2 below is based extensively on the report of the output from that workshop, with minor editorial changes to reflect points raised in the subsequent discussion. The second activity, not yet widely appreciated as being related, is the development of a content-focussed data dictionary within MPEG. ISO/IEC JTC 1/SC29, The Moving Picture Experts Group (MPEG), is formally a joint working group of ISO and the International Electrotechnical Commission. Originally best known for compression standards for audio, MPEG now includes the MPEG-21 "Multimedia Framework", which includes several components of digital rights management technology standardisation. Some of the components are already being used in digital library activities. One component is a Rights Data Dictionary that was established as a component to support activities such as the MPEG Rights Expression Language. In April 2005, the ISO/IEC Technical Management Board appointed a Registration Authority for the MPEG 21 Rights Data Dictionary (ISO/IEC Information technology - Multimedia framework (MPEG-21) - Part 6: Rights Data Dictionary, ISO/IEC 21000-6), and an implementation of the dictionary is about to be launched. However, the Dictionary design is based on a generic interoperability framework, and it will offer extensive additional possibilities. The design of the dictionary goes back to one of the major studies of the conceptual model of interoperability, <indecs>. Section 3 below provides a brief summary of the origins and possible applications of the ISO/IEC 21000-6 Dictionary.