KEYWORD ACQUISITION DEVICE, KEYWORD ACQUISITION METHOD AND KEYWORD ACQUISITION PROGRAM

摘要

PROBLEM TO BE SOLVED: To collect keywords with high accuracy in performing a task of acquiring a set of keywords having the same superordinate concept as a designated set of initial keywords.

SOLUTION: In a keyword acquisition device 1, a keyword instance selecting unit 111 selects, on the basis of the score of each keyword in a keyword set calculated by a keyword instance score counting unit 110, a plurality of keywords out of the keyword set as the desired keyword set and selects, on the basis of the generality evaluation value of each keyword in the keyword set calculated by the keyword instance generality evaluating unit 200, a keyword set to be subjected to a surface layer pattern extracting unit 105 out of the pertinent keyword set. When the keyword selection is to be executed a prescribed number of times, the selected keyword set and the score of each keyword in the set are subjected to extraction of the surface layer pattern and calculation of the score thereof based on the keyword set to be processed.

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