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Natural language information retrieval system

  • US 6,553,372 B1
  • Filed: 02/26/1999
  • Issued: 04/22/2003
  • Est. Priority Date: 07/13/1998
  • Status: Expired due to Term
First Claim
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1. A method for creating a group of searchable documents comprising the steps of, for each of a plurality of documents:

  • receiving text defining the document;

    parsing the text into a plurality of text portions;

    obtaining one or more logical form relationships corresponding to each text portion;

    defining an array having a size corresponding to the number of logical form relationships for the document; and

    creating a hash-table fingerprint for the document by, for each logical form relationship, computing a hash value, obtaining an address hash and a signature hash based on the corresponding hash value, and storing the signature hash in the array at a memory location corresponding to the address hash.

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