Apparatus for retrieving documents

Details Apparatus for retrieving documents Apparatus for retrieving documents

2007-03-06

2007-03-06

Hwang, Joon Hwan (Department: 2166)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C704S009000

Reexamination Certificate

active

10724213

ABSTRACT:
In an apparatus for retrieving documents, each document and a query character string are divided into a plurality of index keys. A retrieval condition analyzing part analyses a retrieval condition including the index keys divided from the query character string and generates a retrieval condition tree synthesized by at least one operator that retrieves an intermediate retrieval result including the document information from said index table. A retrieval condition evaluating part evaluates each intermediate retrieval result obtained by the retrieval condition tree and determining a final retrieval result.

REFERENCES:
patent: 5412807 (1995-05-01), Moreland
patent: 5706365 (1998-01-01), Rangarajan et al.
patent: 6-052222 (1994-02-01), None
patent: 8-101848 (1996-04-01), None
patent: 11-282880 (1999-10-01), None
D'Amore et al. (One-time complete indexing of text: theory and practice, ACM, 1985, pp. 155-164).
Yasushi et al. (Optimizing query evaluation in n-gram indexing, ACM, Aug. 1998, pp. 367-368).
Yasushi et al. (“Overlapping statistical word indexing: A new indexing method for Japanese text”, ACM, 1997, pp. 226-234).

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