CODEWITHSUNDEEP
owlontologyowl-api
Claudio Pomo
Claudio Pomo

Reputation: 2472

OWL api find properties of class

I've an ontology file and I can obtain all classes in its (I'm using OWL-API). Well, I should retrieve, for each classes, data properties and object properties present into my file .owl, there is any way to get them with OWL-API?

Upvotes: 5

Views: 2923

Answers (2)

Jose Juarez
Jose Juarez

Reputation: 61

public void test(){

        File file = new File("Ontology.owl");
        OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
        OWLOntology ontology;

        try {
            ontology = manager.loadOntologyFromOntologyDocument(file);

            Set<OWLClass> classes;
            Set<OWLObjectProperty> prop;
            Set<OWLDataProperty> dataProp;
            Set<OWLNamedIndividual> individuals;

            classes = ontology.getClassesInSignature();
            prop = ontology.getObjectPropertiesInSignature();
            dataProp = ontology.getDataPropertiesInSignature();
            individuals = ontology.getIndividualsInSignature();
            //configurator = new OWLAPIOntologyConfigurator(this);            

            System.out.println("Classes");
            System.out.println("--------------------------------");
            for (OWLClass cls : classes) {
                System.out.println("+: " + cls.getIRI().getShortForm());

                System.out.println(" \tObject Property Domain");
                for (OWLObjectPropertyDomainAxiom op : ontology.getAxioms(AxiomType.OBJECT_PROPERTY_DOMAIN)) {                        
                        if (op.getDomain().equals(cls)) {   
                            for(OWLObjectProperty oop : op.getObjectPropertiesInSignature()){
                                 System.out.println("\t\t +: " + oop.getIRI().getShortForm());
                            }
                            //System.out.println("\t\t +: " + op.getProperty().getNamedProperty().getIRI().getShortForm());
                        }
                    }

                    System.out.println(" \tData Property Domain");
                    for (OWLDataPropertyDomainAxiom dp : ontology.getAxioms(AxiomType.DATA_PROPERTY_DOMAIN)) {
                        if (dp.getDomain().equals(cls)) {   
                            for(OWLDataProperty odp : dp.getDataPropertiesInSignature()){
                                 System.out.println("\t\t +: " + odp.getIRI().getShortForm());
                            }
                            //System.out.println("\t\t +:" + dp.getProperty());
                        }
                    }

            }

        } catch (OWLOntologyCreationException ex) {
            Logger.getLogger(OntologyAPI.class.getName()).log(Level.SEVERE, null, ex);
        }
}

Upvotes: 6

Phil Lord
Phil Lord

Reputation: 3067

This should be an answer, I think, rather than a comment.

To get the properties of a class, you just use getSuperClasses. So, if you have a class like so

A
  :subClassOf (r some B)

then (getSuperClasses A) will return a set with a single OWLClassExpression which will be an instance of OWLObjectSomeValuesFrom. In turn, you can get the property with getProperty.

Upvotes: 0

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