DOCUMENT CLASSIFICATION DEVICE, DOCUMENT CLASSIFICATION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a document classification device capable of performing a further detailed classification by comprehensively classifying the documents when the documents are classified, and a document classification method, and a program.SOLUTION: A vector in a field of input documents is obtained by dividing a sum of the similarity between unclassified documents and documents classified by a field and the similarity between the documents of the field in one hierarchy obtained by using the number of fields of one hierarchy that constitutes a hierarchy to which the documents classified by the field belong with respect to a sum of the similarity between the unclassified documents and at least one or more hierarchically classified documents by the field and the similarity between the documents in the hierarchy obtained by using the number of fields to which the documents classified by the field belong.