21. The method of claim 1 , further comprising: analyzing the data files having the association with the social community, the analyzing including: extracting features from the data files having the association with the social community; computing a combination or a permutation of one or more of the extracted features; and updating the list of key terms based on the extracted features and the combination or the permutation.
22. The method of claim 21 , wherein the extracted features are words, phrases, sentences, or symbols, and wherein the combination or the permutation includes a synonym, a collocation, a sequential collocation, a bigram, a noun phrase, a named entity, a part of speech, or a raw term.