Context-sensitive query expansion
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United States of America Patent
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Nov 9, 2010
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app pub date -
Feb 5, 2008
filing date -
Feb 5, 2008
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Abstract
A method for processing a search query having a plurality of search terms for searching for documents includes segmenting the query to identify two or more units, expanding the query by selecting one or more substitutable units for at least one unit in the query, and calculating a substitution probability for each substitutable unit. For each substitutable unit, a co-occurrence probability is calculated with each of the remaining units in the search query. An occurrence probability is then calculated for each substitutable unit, and a score is calculated based on the combination of the substitution probability, the co-occurrence probability, and occurrence probability. The documents are ranked in an order determined by the score.
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