Patent ID: 6665668
Filing Date: 2003-12-16
Classification: G06F,Y10S

Abstract:
A document retrieval method for a text database which stores document information as character code data, comprising:a document registration step of extracting a predetermined substring and location information of said substring in registration-target text data from said registration-target text data to store said substring and said location information as a location information file; a document retrieval step of extracting a predetermined substring from a query expression and extracting a retrieving substring from a part or all of said predetermined substring to calculate a similarity by using location information of said retrieving substring acquired from said location information file and by a predetermined method, said similarity being a degree of similarity between contents of said query expression and contents of a text in said text database; and an information-of-important-string display step of selecting an important substring from said extracted retrieving substring based on said calculated similarity to display information of said important substring among information used for calculating said similarity.