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javasemantic-webowlowl-api

Writing OWLObjectPropertyExpression on OWL Ontology using OWL API

I'm trying to write an OWLObjectPropertyExpression on OWL Ontology object. If I had an OWL Class I use something like the following:

 OWLOntologyManager managerWriter = OWLManager.createOWLOntologyManager();
 OWLOntology ontoWrite=managerWriter.createOntology();
 OWLDataFactory factory = manager.getOWLDataFactory();
 managerWriter.addAxiom(ontoWrite,factory.getOWLDeclarationAxiom(factory.getOWLClass((cl.getIRI()))));

But what should I write if I want to write an OWLObjectPropertyExpression ? Thanks in advance !.

Solution

  • The following code snippet illustrate an example of usage and creation of an OWL expression using the OWL API (taken and adapted from there):

    //OWL Expression we would like to create:
//in OWL Functional syntax: ObjectIntersectionOf(A ObjectSomeValuesFrom(R B))
//in Manchester syntax: A and R some B
PrefixManager pm = new DefaultPrefixManager("http://example.org/");
OWLClass A = factory.getOWLClass(":A", pm);
OWLObjectProperty R = factory.getOWLObjectProperty(":R", pm);
OWLClass B = factory.getOWLClass(":B", pm);

//The expression
OWLClassExpression expression = 
  factory.getOWLObjectIntersectionOf(A, factory.getOWLObjectSomeValuesFrom(R, B));

//Create a class in order to use the expression
OWLClass C = factory.getOWLClass(":C", pm);

// Declare an equivalentClass axiom
//Just there to show how an example on how to use the expression
OWLAxiom definition = factory.getOWLEquivalentClassesAxiom(C, expression);
manager.addAxiom(ontology, definition);