05469354 is referenced by 72 patents and cites 11 patents.

High-speed full document retrieval method and system capable of providing result of retrieval within practically acceptable short search time. Upon registration of documents in a document database, condensed texts are created by decomposing each of textual character strings of the documents to be registered into fragmental character strings in dependence on character species and by checking mutual inclusion relations existing among the fragmental character strings. A component character table is created in which characters occurring in each of the condensed texts are registered without duplication. The condensed texts and the component character table are registered in the data base together with the texts of the documents to be registered. Upon retrieval of a document containing a search term designated by a user, a component character table search is first executed to extract those documents which contain all species of characters constituting the search term by consulting the component character table, and subsequently a condensed text search is executed by consulting the condensed texts of the documents. Finally, a text body search is executed for extracting a document which satisfies query condition imposed on the search term by consulting the texts of the documents extracted through the component character table search and the condensed text search.

Title
Document data processing method and apparatus for document retrieval
Application Number
555483
Publication Number
5469354
Application Date
February 28, 1992
Publication Date
November 21, 1995
Inventor
Satoshi Asakawa
Hirakata
JP
Katsumi Tada
Kokubunji
JP
Naoki Minegishi
Osaka
JP
Hisamitsu Kawaguchi
Sagamihara
JP
Kanji Kato
Tokorozawa
JP
Hiromichi Fujisawa
Tokorozawa
JP
Atsushi Hatakeyama
Kokubunji
JP
Agent
Antonelli Terry Stout & Kraus
Assignee
Hitachi
JP
IPC
G06F 17/21
View Original Source