| 摘要 |
PROBLEM TO BE SOLVED: To accurately obtain relevance between keywords without directly measuring it from an entire object of search.SOLUTION: A keyword relevance score calculating device for calculating a relevance score between keywords in a keyword set corresponding to a condition specified by a user, includes: combination acquiring means which acquires a set of combinations of two keywords from the keyword set and stores the set of keyword combinations in keyword combination storing means; and score calculating means which calculates a relevance score between keywords relating to a combination on the basis of a relationship between two nodes corresponding to the keyword combination in an existing hierarchical structure, for each of the keyword combinations stored in the keyword combination storing means, by referencing hierarchical structure storing means which stores data representing an existing hierarchical structure in which a character string serves as the label of a node. |
