Full-Text index producing device for producing a full-text index

Details Full-Text index producing device for producing a full-text index Full-Text index producing device for producing a full-text index

1997-04-21

1999-08-17

Black, Thomas G.

Data processing: database and file management or data structures

Database design

Data structure types

707101, 707 21, G06F 1730

Patent

active

059408367

ABSTRACT:
A full-text data base retrieving device retrieves a data base in accordance with a query. A full-text index has character location information representative of location of each of key character sequences of N characters that appear in the data base, where N is a positive integer. A query memory memorizes the query as a retrieval key character sequence. A separating section separates the retrieval key character sequence into a plurality of retrieval key character sequences of N characters to extract contexts as extracted contexts from the retrieval key character sequence in accordance with the retrieval key character sequences. A context classifying section classifies the extracted contexts into classified contexts having the classification numbers, respectively. An index retrieving section retrieves the full-text index in accordance with the sorts of the retrieval key character sequences and the classified contexts to read the character location information as a retrieval result out of the full-text index. A detecting section detects appearance locations of the retrieval key character sequence in the full-text data base to produce the appearance locations as a detected result.

REFERENCES:
patent: 4985863 (1991-01-01), Fujisawa et al.
patent: 5265242 (1993-11-01), Fujisawa et al.
patent: 5717922 (1998-02-01), Hohensee et al.
patent: 5819288 (1998-10-01), DeBonet
patent: 5873056 (1999-02-01), Liddy et al.

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