DATA RETRIEVAL METHOD, DATA RETRIEVAL SYSTEM, AND ELECTRONIC BULLETIN BOARD SYSTEM USING DATA RETRIEVAL SYSTEM

摘要

PPROBLEM TO BE SOLVED: To provide a data retrieval method and data retrieval system that solves a problem in data retrieval by a general cooperation filtering method by considering the evaluation of a user to an item as a user's identification-tag, and easily retrieving a user trustworthy for a retrieving user. PSOLUTION: From a database having a user group and an item group and registering the evaluation of each user made to correspond to each item, the same evaluation user having performed the same evaluation to an item specified from a database is retrieved based on an item specified by the retrieving user and the evaluation of the item, similarity calculation between evaluation histories is performed based on the evaluation history of the retrieving user and the evaluation history of the same evaluation user, and the same evaluation user is sorted according to the similarity. PCOPYRIGHT: (C)2010,JPO&INPIT