5. The method as claimed in claim 1 , wherein combining the first scores and combining the one or more third scores further comprise using a Threshold Algorithm to simultaneously scan the results from different indices to aggregate retrieved document scores.
5. The method as claimed in claim 1 , wherein combining the first scores and combining the one or more third scores further comprise using a Threshold Algorithm to simultaneously scan the results from different indices to aggregate retrieved document scores. 6. The method as claimed in claim 5 , wherein the Threshold Algorithm uses AND or OR semantics between the indices.