Patent ID: 6701305
Filing Date: 2004-03-02
Classification: G06F

Abstract:
A method of retrieving information from a text data collection that comprises a plurality of documents with each document comprised of a plurality of terms, wherein the text data collection is represented by a term-by-document matrix having a plurality of entries with each entry being the frequency of occurrence of a term in a respective document, and wherein the method comprises:receiving a query; projecting a representation of at least a portion of the term-by-document matrix into a lower dimensional subspace to thereby create at least those portions of a subspace representation Ak relating to a term identified by the query; weighting at least those portions of a subspace representation Ak relating to a term identified by the query following the projection into the lower dimensional subspace; scoring the plurality of documents with respect to the query based at least partially upon the weighted portion of the subspace representation Ak; and identifying respective documents based upon relative scores of the documents with respect to the query.