OWL Shows Off

Re: Does Euler support owl:hasValue ? from Jos De_Roo on 2004-04-14 (www-rdf-logic@w3.org from April 2004)

I was very lucky to get help from Bejamin Nowack and Mr. Euler Jos De Roo. I asked the www-rdf-logic list about how to declare an object is a member of a owl:Class based on a Literal value of a Property. I was close, only backwards. The correct OWL would be something like:


[ a owl:Restriction ; owl:onProperty dc:subject ; owl:hasValue "blogging"^^xsd:string ] rdfs:subClassOf :PostAboutBlogging .
:PostAboutBlogging a owl:Class .
dc:subject a owl:DatatypeProperty ; rdfs:range xsd:string .


Then, with a fact like the following (easily taken from some RSS):


:blogitem a owl:Thing ; dc:subject "blogging"^^xsd:string .


I could tell:


:blogitem a :PostAboutBlogging .


I hope this at least illustrates my goal: to map different dc:subjects from different blogs into a locally understood set of owl:Classes. Then, provide a way to create Planet*.com sites with ad hoc aggregation based on queries given by users. And the first query: " Collect all blog entries that are of type XXX "

OWL is nice, and Euler is nice. Now, to plug them into the planetrdf.com code.

Thoughts or comments?

Popular posts from this blog

Lists and arrays in Dart

The 29 Healthiest Foods on the Planet

Converting Array to List in Scala