ensurePrepared();
DefaultNodeSet<OWLClass> result = new OWLClassNodeSet();
for (OWLOntology ontology : getRootOntology().getImportsClosure()) {
for (OWLObjectPropertyDomainAxiom axiom : ontology
.getObjectPropertyDomainAxioms(pe)) {
result.addNode(getEquivalentClasses(axiom.getDomain()));
if (!direct) {
result.addAllNodes(getSuperClasses(axiom.getDomain(), false)
.getNodes());
}
}