Methods, apparatus and computer program products for information retrieval and document classification utilizing a multidimensional subspace
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United States of America Patent
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Mar 2, 2004
Issued Date -
N/A
app pub date -
Oct 20, 2000
filing date -
Jun 9, 1999
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Abstract
Methods, apparatus and computer program products are provided for retrieving information from a text data collection and for classifying a document into none, one or more of a plurality of predefined classes. In each aspect, a representation of at least a portion of the original matrix is projected into a lower dimensional subspace and those portions of the subspace representation that relate to the term(s) of the query are weighted following the projection into the lower dimensional subspace. In order to retrieve the documents that are most relevant with respect to a query, the documents are then scored with documents having better scores being of generally greater relevance. Alternatively, in order to classify a document, the relationship of the document to the classes of documents is scored with the document then being classified in those classes, if any, that have the best scores.
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