[Proposal][SKOS-Core] Revised proposal for subject-based indexing

Hi,

Here is a revised proposal for additions to SKOS Core to support some
subject-based indexing functionality:

Add the following properties:

 - 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)

That's all.

Al.

---
Alistair Miles
Research Associate
CCLRC - Rutherford Appleton Laboratory
Building R1 Room 1.60
Fermi Avenue
Chilton
Didcot
Oxfordshire OX11 0QX
United Kingdom
Email:        a.j.miles@rl.ac.uk
Tel: +44 (0)1235 445440