TRIGGER QUERY ACQUISITION DEVICE, TRIGGER QUERY ACQUISITION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To solve the problem in a conventional method for acquiring a keyword in some category that there is difficulty of acquiring a keyword comprehensively when acquisition is made manually.SOLUTION: A trigger query acquisition unit 1 enables a keyword corresponding to some category to be automatically acquired using a query log, the trigger query acquisition unit 1 comprising: graph creation means 102 for creating a minimum digraph having a node corresponding to each of search queries possessed by two search logs and a link from one node to the other node; score calculation means 104 for calculating, by using a seed query, a score for each of the nodes of a digraph composed of minimum digraphs; trigger query acquisition means 105 for acquiring a trigger query which is a search query corresponding to one of the nodes for which the score satisfies a condition; and output means 107 for outputting the acquired trigger query.