A criteria generation device, a criteria generation method, a storage medium storing a criteria generation program, a database search system, and a storage medium having a database search program

摘要

The present invention provides a criteria generating device and the like which enable a high-speed search even when a database contains non-searchable information. The criteria generating means (101) comprises a criteria generating unit (102) that: calculates a truth value indicating whether or not search criteria constituting a subset of first search criteria are satisfied, the first search criteria being a part of target search criteria (201 ) containing first and second search criteria representing criteria for extracting information from the database; sets the aforementioned subset of search criteria to the calculated truth value; and according to the determination whether or not the target search criteria (201) are satisfied with the set truth value set, generates third search criteria (202) that depend on the truth value of the second search criterion.