thanks Joshua Taylor
On Fri, Apr 19, 2013 at 12:22 AM, Joshua TAYLOR <[email protected]>wrote: > 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/ >
