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Full-text retrieval system and method

A retrieval system and full-text technology, applied in the fields of instruments, calculations, electrical digital data processing, etc., can solve problems such as lack of full-text retrieval

Active Publication Date: 2008-08-20
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the first and second prior art has a structure for speeding up the full-text search itself.

Method used

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  • Full-text retrieval system and method

Examples

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Embodiment Construction

[0024] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a full-text search system according to one embodiment of the present invention. This full-text search system is a system that performs searches based on N-gram indexes (ie, full-text searches) and searches based on morpheme indexes (ie, natural language searches) based on search requests from users. Wherein, in the full-text search system in FIG. 1 , part of the full-text search (secondary search based on N-gram index) can be omitted when certain conditions are met.

[0025] The composition of the full-text retrieval system of Fig. 1 includes: user interface 11, retrieval execution / response server 12, N-gram retrieval engine 13, N-gram index database 14, morpheme analysis mechanism 15, morpheme retrieval engine 16, morpheme index database 17 and Full-text search execution control mechanism 18.

[0026] The user interface...

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Abstract

A first search unit (13) executes a search based on an N-gram index (14) by using a first search according to searching condition sentences and a secondary search aiming at the results of the first search. A morpheme analysis unit (15) can conduct the morpheme analysis on the searching condition sentences. A second search unit (16) executes a morpheme search based on a morpheme index (17) according to the analysis results of the morpheme analysis unit (15). An approximation-degree decision unit (183) can decide the approximation degree between the first hit value of the hit values of the first search based on the N-gram index (14) and the second hit value of the hit values of the morpheme search based on the morpheme index. A full-text search executes a control unit (18), and the secondary search based on the N-gram index can be omitted, and the first search unit (13) can be controlled when the first hit value is approximate to the second hit value; and the results of the first search or the results of the morpheme search can be taken as search results.

Description

technical field [0001] The invention relates to a full-text retrieval system and method suitable for rapidly searching documents meeting specified retrieval conditions by using a full-text retrieval technology from huge electronic document information. Background technique [0002] Many kinds of retrieval systems have been developed to retrieve documents that meet specified retrieval conditions from among electronically huge document information. As a typical retrieval method for document retrieval applied to such a retrieval system, a retrieval method based on an N-gram (N-hyphenate) index or a retrieval method based on a morpheme index is known. The retrieval method based on N-gram index is used in full-text retrieval. On the other hand, a retrieval method based on a morpheme index is used in natural language retrieval (concept retrieval). An outline of these search methods is as follows. [0003] <Retrieval method based on N-gram index> [0004] A character stri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 高知尾胜彦笹气光一加藤阳二
Owner KK TOSHIBA
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