SesameSparqlEvaluator eval = new SesameSparqlEvaluator(dataRepository);
if (this.nsr == null) {
RepositoryResult<Namespace> nsi = dataRepository.getConnection().getNamespaces();
Namespace ns;
this.nsr = new SPARQLNSResolver();
while (nsi.hasNext()){
ns = nsi.next();
this.nsr.addPrefixBinding(ns.getPrefix(), ns.getName());
}
}