| 摘要 |
PURPOSE:To extract a key word by utilizing various information in a document, specially, information on a syntax analytic result level under a united framework. CONSTITUTION:A data converting means 3 converts the analytic result of a syntax analyzing means 2 into a node link structure connecting node link structures by regarding regarding independent word parts as the node structures and the relation between the independent word parts as a link structure and a ranking arithmetic means 4 calculates the key word ranking of respective nodes in the node link structure by following the nodes while weighting them on the basis of parameters corresponding to the level of information on inter- sentence structure level or in-sentence structure level, thereby using the ranking for key word extraction. |
