Pattern searching methods and apparatuses

  • US 7,912,828 B2
  • Filed: 02/23/2007
  • Issued: 03/22/2011
  • Est. Priority Date: 02/23/2007
  • Status: Active Grant
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First Claim
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1. A machine-implemented method for identifying patterns in text using structures defining types of patterns which are to be identified, wherein a structure comprises one or more definition items, the method comprising:

  • assigning a fixed weighting to each structure and each definition item in each structure, each fixed weighting being an integer multiple of the same integer;

    searching the text for a pattern to be identified on the basis of a particular structure, a pattern being provisionally identified if it matches the definition given by said particular structure;

    in a provisionally identified pattern, determining definition items making up said particular structure that have been identified in the provisionally identified pattern;

    combining the fixed weightings of the determined definition items and the fixed weighting of the particular structure to a single quantity;

    assessing whether the single quantity fulfils a given condition; and

    depending on the result of said assessment, rejecting or confirming the provisionally identified pattern.

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