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Simple Knowledge Organization System (SKOS)

SKOS is an area of work developing specifications and standards to support the use of knowledge organization systems (KOS) such as thesauri, classification schemes, subject heading lists, taxonomies, terminologies, glossaries and other types of controlled vocabulary within the framework of the semantic web.

There are three RDF vocabularies under active development: SKOS Core | SKOS Mapping | SKOS Extensions. There is also the SKOS API, a web service API for interacting with a KOS datasource.

SKOS Specification Development

The following specifications are under development within the W3C Semantic Web Best Practices and Deployment Working Group:

These three documents describe the SKOS Core Vocabulary, which is currently the most active development area - see the SKOS Core web page for more specific information, current status and links.

The SKOS Mapping Vocabulary and the SKOS Extensions Vocabulary are also open development projects, however these are less mature than SKOS Core, consult their web pages for more detailed information and current status.

SKOS RDF Vocabularies

SKOS Development

All SKOS development work is mediated via the Semantic Web Interest Group mailing list public-esw-thes@w3.org. This mailing list is completely open and active participation is very welcome [subscribe]. There is also an online public archive of the mailing list and a SKOS development wiki.

All changes to any of the SKOS RDF vocabularies are reported on the SKOS Changelog.

Alistair Miles <a.j.miles@rl.ac.uk>