System or program for searching documents

Details System or program for searching documents System or program for searching documents

2011-07-19

2011-07-19

Fleurantin, Jean B. (Department: 2162)

Data processing: database and file management or data structures

Database and file access

Query optimization

Reexamination Certificate

active

07984044

ABSTRACT:
In document search for searching a document by use of a query formula composed of a Boolean formula of keywords, a plurality of query formulas arriving at about the same time from a plurality of users are efficiently processed. A system or a program for searching documents includes: a query formula controller for sorting a plurality of query formulas into a plurality of query formula sets based on predicted search speeds of the respective query formulas; and a search unit for searches for the plurality of sorted query formula sets sequentially from the set having the fastest predicted search speed, and for, in each search processing, merging the query formulas in the corresponding query formula set into a formula and thereby searching from the merged formula.

REFERENCES:
patent: 5454105 (1995-09-01), Hatakeyama et al.
patent: 2005/0278368 (2005-12-01), Benedikt et al.
Boyer R.S. et al., “A fast string search algorithm”, Communications of the ACM, 20 (10): pp. 762-772, 1997.

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