The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 1992
Filed:
Aug. 09, 1990
Kanji Kato, Tokoroazawa, JP;
Hiromichi Fujisawa, Tokoroazawa, JP;
Mitsuo Ooyama, Tokyo, JP;
Hisamitsu Kawaguchi, Tokyo, JP;
Atsushi Hatakeyama, Tokyo, JP;
Noriyuki Kaneoka, Tokyo, JP;
Mitsuru Akizawa, Tokyo, JP;
Masaaki Fujinawa, Tokyo, JP;
Hidefumi Masuzaki, Hadano, JP;
Masaharu Murakami, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method and apparatus for making document information search and a magnetic disk unit to be used for realizing the method and apparatus. In the document information search method, in performing document search with respect to a desired subject key word, two stages of presearch are carried out. In a first stage of presearch (step 402), a character component table (500) in which existence of character codes for every document is stated with respect to all the character codes contained in the group of document text data of stored documents is generated, and the character component table is searched for all the character codes constituting a desiredly designated search subject key word to thereby extract all the documents each containing all the character codes constituting the search subject key word. In a second stage of presearch step 403), contracted text data for every document in which adjuncts and duplication of repeatedly stated words contained in advance in the text data are eliminated is generated, and the documents each containing the search subject key words by word are extracted from the documents extracted by the first presearch. After the second stage of presearch, text search is performed in accordance with a neighbor condition, a contextual condition, or the like (step 404). Further, as a term comparator means, hardware (1106) for exclusive use for term comparison in accordance with a finite automation is employed. Further, as for different notation and synonym, inputted terms are once subject to different notation development in a different notation development processing portion (2601), each of the different-notation developed terms is subject to synonym development in a synonym development processing portion (2602) while referring to a synonym dictionary, and then the results of synonym development are further subject to different notation development in a different notation development processing portion (2603) in accordance with a conversion rule table (2603).