Re: problème with identification of intersection class

[Dave Reynolds]

On 12/06/13 14:18, Fadhela Kerdjoudj wrote:
Hi,
I have a problem while testing if my class is an intersectionClass or not.
Let assume that my class is :
<owl:Class rdf:about="&gs;C">
         <owl:equivalentClass>
             <owl:Class>
                 <owl:intersectionOf rdf:parseType="Collection">
                     <rdf:Description rdf:about="&foaf;Organization"/>
                     <owl:Restriction>
                         <owl:onProperty rdf:resource="&gs;isAgent"/>
                         <owl:allValuesFrom rdf:resource="&gs;ViolentAct"/>
                     </owl:Restriction>
                     <owl:Restriction>
                         <owl:onProperty rdf:resource="&gs;place"/>
                         <owl:allValuesFrom rdf:resource="&v;Address"/>
                     </owl:Restriction>
                 </owl:intersectionOf>
             </owl:Class>
         </owl:equivalentClass>
     </owl:Class>

When I try to use it as an intersectionClass to recover operands, I have an
exception which indicate me that C is not an intersectionClass:
*Exception in thread "main" com.hp.hpl.jena.ontology.ConversionException:
Cannot convert node http://www.geolsemantics.com/onto#C to IntersectionClass

From the RDF point of view C is not the intersectionClass it is 
owl:equivalentClass to the intersection class.

Assuming no inference then use getEquivalentClass to get the anonymous 
intersection class and then use asIntersectionClass on that.

Dave