24. The system of claim 19 , further comprising means for defining a set of feature vectors, with each feature vector based on information related to the query and a respective one of the set of documents.
24. The system of claim 19 , further comprising means for defining a set of feature vectors, with each feature vector based on information related to the query and a respective one of the set of documents. 25. The system of claim 24 , wherein the query is based on an input document, and each of the feature vectors is based on similarity score for one or more portions of the document and the respective one of the set of documents.