The following proposal for additions to SKOS Core to support subject-based
indexing has been actioned:
Add the following properties to SKOS Core:
- subject
- isSubjectOf
- primarySubject
- isPrimarySubjectOf
Additionally, the following points are a part of this proposal:
(1) skos:subject is a sub-property of dc:subject.
(2) skos:subject and skos:isSubjectOf are inverse.
(3) skos:primarySubject is a sub-property of skos:subject.
(4) skos:primarySubject and skos:isPrimarySubjectOf are inverse.
(5) Wrt skos:subject, the following rule applies:
(?d skos:subject ?x)(?x skos:broader ?y) -> (?d skos:subject ?y)
See the SKOS Core Vocabulary Specification for an overview of these terms:
http://www.w3.org/2004/02/skos/core/spec/
All new terms have an 'unstable' status and comments and suggestions are
most welcome.