DOCUMENT SORTING DEVICE AND METHOD, AND DATABASE UPDATING METHOD

摘要

PROBLEM TO BE SOLVED: To solve a problem that a conventional document sorting device does not consider efficient updating of a database to be used for sorting document for preventing lowering in the retrieval accuracy of a document. SOLUTION: In the database to be used for the document sorting device, similarity between document data and registered document data in the database is calculated and when sorting of the registered document data is matched with the sorting of the document data, this calculated similarity is stored as a right answer influence degree but when sorting of the said registered document data is not matched with the sorting of the document data, the similarity is stored as a wrong answer influence degree. Since the database is updated so as to delete the registered document data from the database by sorting corresponding to the right answer influence degree and wrong answer influence degree, even when a word to be used for the same sorting in the database is changed with the passage of time, appropriate sorting can be applied without increasing the number of registered documents needlessly.