DEVICE AND PROGRAM FOR GENERATING KEYWORD FOR DATA RETRIEVAL

摘要

PROBLEM TO BE SOLVED: To provide a device and a program for generating keyword for data retrieval, by which the retrieval efficiency and the operation efficiency can be improved. SOLUTION: A keyword generator 1 for data retrieval is provided with a keyword hierarchizing means 3b for making a plurality of keywords added for data retrieval into hierarchized structure and managing the hierarchically structured keywords on a list.