11. A method for grouping similar documents, comprising: determining frequencies of occurrences for terms and noun phrases within a set of documents; selecting a subset of the documents by removing those documents having terms and noun phrases that fall outside a bounded range of upper and lower conditions for frequency of occurrence; mapping each of the documents in the subset to a cluster of documents based on a similarity of the documents in the subset to the cluster documents.
11. A method for grouping similar documents, comprising: determining frequencies of occurrences for terms and noun phrases within a set of documents; selecting a subset of the documents by removing those documents having terms and noun phrases that fall outside a bounded range of upper and lower conditions for frequency of occurrence; mapping each of the documents in the subset to a cluster of documents based on a similarity of the documents in the subset to the cluster documents. 12. A method according to claim 11 , further comprising: generating themes for the document subset from the terms and phrases that fall within the bounded range.