// :Person Create an ontology manager to work with
OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
OWLDataFactory dataFactory = manager.getOWLDataFactory();
// The IRIs used here are taken from the OWL 2 Primer
String base = "http://example.com/owl/families/";
PrefixManager pm = new DefaultPrefixManager(null, null, base);
// Get the reference to the :Person class (the full IRI will be
// <http://example.com/owl/families/Person>)
OWLClass person = dataFactory.getOWLClass(":Person", pm);
// Get the reference to the :Mary class (the full IRI will be
// <http://example.com/owl/families/Mary>)