DOCUMENT RETRIEVAL APPARATUS, DOCUMENT RETRIEVAL METHOD, DOCUMENT RETRIEVAL PROGRAM, AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a document retrieval system, preventing retrieval missing as much as possible even in the case of normalizing document data according to the normalization rule having a higher possibility of retrieval missing. SOLUTION: This document retrieval apparatus includes: an extract means for extracting a character string from document data or a text according to a predetermined extraction rule; a storage means for storing the character string extracted from the document data or text by the extract means corresponding to the document data or text; an input means for inputting a text for retrieving a desired document from the document data; a retrieval condition creating means for creating a retrieval word corresponding to the retrieval character string created on the basis of the input text and creating a new retrieval condition on the basis of the retrieval word when the correspondence relationship between the retrieval character string and the retrieval word is predetermined; and a retrieval means for retrieving document data from the storage means according to the retrieval condition created by the retrieval condition creating means. COPYRIGHT: (C)2004,JPO&NCIPI