OWLOntologyManager mgr = OWLManager.createOWLOntologyManager();
OWLDataFactory factory = mgr.getOWLDataFactory();
OWLDataProperty dp = factory.getOWLDataProperty(IRI.create(DP));
DatatypeProperty jdp = null;
try {
jdp = j2o.DataPropOwlToJena(dp, RDFXML);
if(jdp == null){
fail("Some errors accour");
}else{
assertEquals(jdp.getURI(), dp.getIRI().toString());
}