DatatypeProperty email = model.createDatatypeProperty( ns + "email", false );
john.addProperty( email, "john.doe@unknown.org" );
john.addProperty( email, "jdoe@unknown.org" );
assertTrue( model.validate().isValid() );
assertIteratorValues( model.listSubjectsWithProperty( email, "john.doe@unknown.org" ),
new Resource[] { john } );
assertTrue( model.contains( null, email, "john.doe@unknown.org" ) );