8. The method of claim 7 wherein the hierarchy is based upon at least one of: exact matches, stopwords, related words, unrelated words.
8. The method of claim 7 wherein the hierarchy is based upon at least one of: exact matches, stopwords, related words, unrelated words. 9. The method of claim 8 , wherein the hierarchy comprises, in order of precedence, exact matches followed by stopwords followed by related words followed by unrelated words.