DOCUMENT DATA COMPARISON METHOD, DOCUMENT DATA COMPARISON APPARATUS, AND DOCUMENT DATA COMPARISON PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a document data comparison method, a document data comparison apparatus, and a document data comparison program in which conversion into character codes and calculation of metric values are contrived to allow utilization of attribute information other than character codes.SOLUTION: A document data comparison apparatus 1 comprises: a character string/attribute extraction unit 2 which divides document data composed of sets of character string fragments into character string fragments and extracts attribute information representing the status of the character string fragments in the document; a metric calculation unit 3 which converts the characters contained in the character string fragments into the corresponding character codes to extract character code sequences, and calculates the similarity metric of the character string fragments; and a comparison unit 3 which searches the document data for sets of character string fragments having a ratio of similarity metric being within a numerical range A and matched attribute information, and which when the ratio of similarity metric is within a numerical range B, determines that the contents of the sets of character string fragments match and outputs the determination as a comparison result. This allows the contents of the document data to be compared in the form character codes.