METHOD AND SYSTEM FOR FULL-TEXT RETRIEVAL AND RECORD MEDIUM RECORDING FULL-TEXT RETRIEVAL PROGRAM

摘要

PROBLEM TO BE SOLVED: To enable retrieval based upon a numerical number condition such as a date condition only by full-text retrieval by performing conversion to a retrieval condition which enables full-text retrieval for a converted character string and performing full-text retrieval from a full-text retrieval data base according to an inputted retrieval condition and converted retrieval condition. SOLUTION: A registered information editing process part 3 edits inputted document information and date information converted by a date retrieval object converting process part 4 to the format for registration in the full-text retrieval data base 1. In order to perform date retrieval by full-text retrieval, the date retrieval object converting process part 4 converts the date information which is sent from the registered information editing process part 3 and specifies a range included in an inputted document into a full-text retrieval object character string by date parts which can be so specified that they are in the range and sends the converted date information back to the registered information editing process part 3. This date retrieval object converting process part 4 converts the date information included in the document to the format suitable for the full-text retrieval.