private URI getExportedSubjectUri(EObject ref) {
Triples triples = EcoreUtil2.getContainerOfType(ref, Triples.class);
if(triples!=null){
Subject subject = triples.getSubject();
if(subject instanceof Resource){
org.eclipse.emf.ecore.resource.Resource res = subject.eResource();
return res.getURI().appendFragment(res.getURIFragment(subject));
}
}
return null;
}