7. The computer program product according to claim 1 , wherein searching the index for a plurality of keyword hits comprises converting each query of the plurality of keyword queries into a word automaton to search the index.
7. The computer program product according to claim 1 , wherein searching the index for a plurality of keyword hits comprises converting each query of the plurality of keyword queries into a word automaton to search the index. 10. The computer program product according to claim 7 , wherein the searching comprises an in-vocabulary (IV) search, and directly composing the word automaton with a word index transducer.