};
GuidedDTDRLPersistence p = GuidedDTDRLPersistence.getInstance();
String drl = p.marshal(dt);
assertTrue(drl.indexOf("from row number") > -1);
assertTrue(drl.indexOf("rating == ( age * 0.2 )") > 0);
//assertTrue(drl.indexOf("f2 : Driver( eval( age > 7 ))") > 0);