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Information retrieval system with means for analyzing undefined words in a natural language inquiry

  • US 4,994,967 A
  • Filed: 01/11/1989
  • Issued: 02/19/1991
  • Est. Priority Date: 01/12/1988
  • Status: Expired due to Fees
First Claim
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1. In an information retrieval system adapted to perform information retrieval in response to an inquiry sentence inputted in natural language, by carrying out a semantic analysis of the natural language inquiry sentence by means of a semantic analysis unit, and by producing a retrieval condition from a result of said semantic analysis, the improvement comprising:

  • undefined word processing means for classifying an undefined word in the inputted inquiry sentence in accordance with a process of producing a retrieval condition from a semantic analysis of another word in the inquiry sentence, said undefined word being a word unregistered in a dictionary and incapable of direct semantic analysis; and

    display processing means for displaying a message based on a result of classifying the undefined word by said undefined word processing means.

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