Expression extraction device, expression extraction method, and recording medium
US7475007B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Jan 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F40/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided is an expression extraction device for extracting evaluation expressions from text having descriptions on evaluations of a specific evaluation target, which includes a registered expression storage unit for registering an evaluation expression including a predetermined polarity as a registered expression, an expression extraction unit for extracting multiple evaluation expressions and a conjunction expression from the text, a registered expression detection unit for detecting the evaluation expression including the registered expression registered with the registered expression storage unit out of the multiple evaluation expressions, and a polarity judgment unit for judging that the evaluation expression, which is in conjunction with the evaluation expression including the registered expression by means of the conjunction expression in a form of ordinary conjunction, and the series of evaluation expressions, which are not in conjunction with the evaluation expression by means of the conjunction expression in any form of the ordinary conjunction and adversative/concessive conjunction and are not in conjunction with each other by means of the conjunction expression in any fo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.