query languages for OWL

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Maciej - 08 Mar 2006 23:22 GMT

Hello,

I'm using ontologies (OWL) to store information about products

E.g. let's say I've got (in some general notation):

<man trousers> subClassOf <man wear>
<t-shirt> subClassOf <man wear>

<man wear> hasProperty <sizeOf>

I'm looking for a query language (RDQL?, SPARQL?), to ask DB engine
(Jena?) for <man wear> of XXL size. In response I'm supposing to get
some instances of <man trousers> of such size, which in fact means this
language will make some inference about <sizeOf> property. Do you know
any such language?

TIA,

Maciej

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Marc Dzaebel - 15 Mar 2006 00:46 GMT

Hi Maciej,

> I'm looking for a query language (RDQL?, SPARQL?), to ask DB engine
> (Jena?) for <man wear> of XXL size. In response I'm supposing to get
> some instances of <man trousers> of such size, which in fact means this
> language will make some inference about <sizeOf> property. Do you know
> any such language?

If you use Protege with the OWL-plugin, the query could be a comfortable
class definition with logic axioms which is reusable. An attached reasoner
will then infer, which instances satisfy the conditions. However, a
SPARQL-plugin is available too and you have many other possibilities with
the Protege-API, because the Protege-Framestore is optimized for such
queries. The Algernon-plugin works even with plain Protege.

Marc

See http://protege.stanford.edu/plugins/owl/sparql.html

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query languages for OWL

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