On Thu, Apr 18, 2013 at 2:31 PM, aarthi <[email protected]> wrote:
> hi ... i have two ontology. some how i found the equivalent classes in
> that two ontology. l need to create a relation between these two classes,
> that they are equivalent. how to do this in jena?
You want OntClass#addEquivalentClass [1], or just the property
OWL.equivalentClass [2]. Here's an example:
import com.hp.hpl.jena.ontology.OntClass;
import com.hp.hpl.jena.ontology.OntModel;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.vocabulary.OWL;
public class EquivalentClasses {
public static void main(String[] args) {
OntModel model = ModelFactory.createOntologyModel();
String NS = "http://www.example.com/ont#";;
OntClass a = model.createClass( NS + "A" );
OntClass b = model.createClass( NS + "B" );
// If you're working with an OntModel and you have your
// classes as OntClasses, you can use
OntClass#addEquivalentClass.
a.addEquivalentClass( b );
// Alternatively, if you do not have the classes as
// OntClasses, but just as resources, you can still
// just add the following triple to the model:
// [a, OWL.equivalentClass, b]
model.add( a, OWL.equivalentClass, b );
model.write( System.out, "N3" );
}
}
Output:
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
<http://www.example.com/ont#A>
a owl:Class ;
owl:equivalentClass <http://www.example.com/ont#B> .
<http://www.example.com/ont#B>
a owl:Class .
//JT
[1]
http://jena.apache.org/documentation/javadoc/jena/com/hp/hpl/jena/ontology/OntClass.html#addEquivalentClass(com.hp.hpl.jena.rdf.model.Resource)
[2]
http://jena.apache.org/documentation/javadoc/jena/com/hp/hpl/jena/vocabulary/OWL.html#equivalentClass
--
Joshua Taylor, http://www.cs.rpi.edu/~tayloj/
