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Information retrieval by natural language querying

  • US 6,601,026 B2
  • Filed: 09/17/1999
  • Issued: 07/29/2003
  • Est. Priority Date: 09/17/1999
  • Status: Expired due to Term
First Claim
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1. A system for providing information in response to a natural language query, comprising:

  • an information extraction engine adapted to index an updated text source based on a predefined grammar, wherein said predefined grammar is based on one or more topics and objects;

    a database coupled to the information extraction engine to store the index output; and

    a natural language query engine coupled to the database to search the index for the text corpus in response to the natural language query.

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