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System, method and computer program product for performing unstructured information management and automatic text analysis, including a search operator functioning as a Weighted AND (WAND)

  • US 7,146,361 B2
  • Filed: 05/30/2003
  • Issued: 12/05/2006
  • Est. Priority Date: 05/30/2003
  • Status: Active Grant
First Claim
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1. A data processing system for processing stored data, comprising:

  • data storage for storing a collection of data units; and

    coupled to the data storage, a search engine responsive to a query for retrieving at least one data unit from said data storage;

    wherethe query comprises a search operator comprised of a plurality of search sub-expressions each having an associated weight value, and where said search engine returns a data unit having a weight value sum that exceeds a threshold weight value sum; and

    where said search operator comprises a weighted AND function, where varying the threshold weight value varies the operation of the weighted AND function from being substantially a logical OR function to being substantially a logical AND function.

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