Keyword extraction apparatus for Japanese texts

Details Keyword extraction apparatus for Japanese texts Keyword extraction apparatus for Japanese texts

1994-03-29

1997-04-08

Hayes, Gail O.

G06F 1730, G06F 1720

Patent

active

056194102

ABSTRACT:
Sentence segmentation means performing sentence segmentation on the Japanese text data to be processed. Morpheme analysis means divides sentence-by-sentence data into morphemes and analyzes the resultant morphemes on the basis of information regarding morpheme-by-morpheme continuation contained in an analytical dictionary. Morpheme dictionary information development means develops the contents of the morpheme dictionary including part of speech information, semantic classification information, sentence pattern information and noted term information. Keyword candidate extraction means extracts keyword candidates from sentence-by-sentence data on the basis of the part of speech information and the like of each morpheme. Case information acquisition means acquires case information from information regarding the classes of case of keyword candidates immediately preceding noted terms stored in a noted term table and case class classification information for stored in a case class conversion table. Frequency information acquisition means acquires the appearance frequency of each keyword candidate. Importance calculation means calculates the importance of each keyword candidate as keyword. Keyword finalizing means definitely determines as true keywords only those keyword candidates having degrees of importance above a designated level of importance.

REFERENCES:
patent: 5276616 (1994-01-01), Kugal et al.
English Translation of Published Japanese Patent Application 3-135669, Jun. 1991, Nakamura et al.

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