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SKOS and Rules

From: Sean Bechhofer <sean.bechhofer@manchester.ac.uk>
Date: Mon, 27 Nov 2006 18:20:04 +0000
Message-Id: <A4369BEF-D431-4629-BA5B-071A2E688F25@manchester.ac.uk>
To: SWD WG <public-swd-wg@w3.org>

The SKOS Core Guide includes reference to rules:


Inference rules are part of SKOS Core. Inference rules are
described in prose, and where appropriate are expressed using the Jena
2 rule syntax [Jena Inference], or as RDF statements using the OWL
vocabulary [OWL]. Inference rules appear in boxes such as:

An example rule.

(?x ex:p ?y)
(?x ex:q ?y)

prefix ex: <http://www.example.com/eg#>


I can see what's going on here, but it makes me a little
uncomfortable. If the SKOS recommendation is to make use of additional
infrastructure, shouldn't this be couched in terms of a standards
(e.g. RIF when it appears) rather than referring to some particular
implementation (Jena rules)?

Is there going to be some notion of comformance? For example, does
this mean that I *cannot* provide a SKOS implementation without having
some RDF repository that implements the rules -- and in that vein,
what are the precise intended semantics of these rules?


Sean Bechhofer
School of Computer Science
University of Manchester
Received on Monday, 27 November 2006 18:18:52 UTC

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