6. The method of claim 3 , wherein the step of calculating said word similarity score comprises setting said word similarity score equal to a normalized word frequency for each document.
6. The method of claim 3 , wherein the step of calculating said word similarity score comprises setting said word similarity score equal to a normalized word frequency for each document. 7. The method of claim 6 , wherein the normalized word frequency for word w in document D i is given by n w ⁡ ( D i ) = N w ⁡ ( D i ) ∑ j ⁢ N j ⁡ ( D i ) , where N w (D i ) is a number of times word w appears in document D i , and j is an index running over all words in a corpus.