public void testSubDataPropertyOfAxiomAccessors() {
OWLOntology ont = getOWLOntology("ont");
OWLDataProperty propP = DataProperty(iri("p"));
OWLDataProperty propQ = DataProperty(iri("q"));
OWLOntologyManager man = ont.getOWLOntologyManager();
OWLSubDataPropertyOfAxiom ax = SubDataPropertyOf(propP, propQ);
man.addAxiom(ont, ax);
performAxiomTests(ont, ax);
assertTrue(ont.getDataSubPropertyAxiomsForSubProperty(propP).contains(
ax));
assertTrue(ont.getDataSubPropertyAxiomsForSuperProperty(propQ)