| 摘要 |
PURPOSE: A document classification system performing efficient classification of a patent document is provided to supply an indirect quoting relation between patent documents to a user. CONSTITUTION: A database(130) stores a patent document. A document classifying module(150) reads out an indirect quotation relation. The document classifying module performs clustering about the patent documents of a first group by using the read indirect quotation relation. A UI output unit supplies information of the clustered result by the document classifying module to a user. |
