if (!prologPrefixTable.containsKey(prefix)){
queryString = "PREFIX " + prefix + ": <" + (String)defaultPrefixTable.get(prefix) + ">" + NL + queryString;
}
}
Map<Set<Value>, ComplexProvenance> metadata = eval.evaluate(queryString);
Map<Value, ComplexProvenance> provenance = new HashMap<Value, ComplexProvenance>();
java.util.Iterator<Value> it;
for (Set<Value> values: metadata.keySet()){
it = values.iterator();