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INFORMATION RETRIEVAL APPARATUS, INFORMATIN RETRIEVAL SYSTEM, AND INFORMATION RETRIEVAL METHOD

  • US 20090234847A1
  • Filed: 02/10/2009
  • Published: 09/17/2009
  • Est. Priority Date: 03/11/2008
  • Status: Active Grant
First Claim
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1. An information retrieval apparatus, comprising:

  • an input unit for inputting characters;

    a database for storing a name, an attribute word associated with the name, and a degree of relevance indicating a degree of relevance between the name and the attribute word;

    a name retrieval unit for retrieving a name including the input characters from the database so as to output the retrieved name as a candidate name;

    an attribute word generating unit for extracting an attribute word associated with the candidate name output from the name retrieval unit from the database; and

    an output unit for displaying the attribute word extracted by the attribute word generating unit and the candidate name from the name retrieval unit, wherein;

    the attribute word generating unit is configured to;

    obtain a degree of relevance of the candidate name associated with the attribute word from the database with respect to a combination of the extracted attribute words;

    calculate a degree of independency indicating a degree of difference between the extracted attribute words;

    calculate a degree of coverage indicating an extent to which the combination of the extracted attribute words covers the candidate names; and

    calculate a degree of equality indicating uniformity of a number of corresponding candidate names for each attribute word;

    the attribute word generating unit comprises a first score calculating unit for calculating a score of the combination of the attribute words based on at least one of the calculated degree of independency, the calculated degree of coverage and the calculated degree of equality; and

    the attribute word generating unit outputs the combinations of the attribute words to the output unit in a descending order of the score.

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