Information retrieval system, information management system, information retrieval method, information management method, and recording medium

摘要

An evaluation target information processing means (15) inputs evaluation target information having M attribute information items. A combination generating means (14) extracts and combines 1 to M attribute information items from the evaluation target information to generate combinations. An attribute information linking means (12) generates, for each of the combinations, a link attribute value to which the attribute values of the attribute information items are linked. A hash generation means (13) converts the link attribute value to a hash value. A hash table (19) stores registered information so as to correspond to the hash value corresponding to the registered information. An information searching means (18) searches the hash table (19) and extracts registered information registered so as to correspond to the hash value that matches any of the hash values converted by the hash generation means (13).