Automatic refinement of information extraction rules
US8417709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2010 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | May 19, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/313
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for automatically refining information extraction (IE) rules. A provenance graph for IE rules on a set of test documents is determined. The provenance graph indicates a sequence of evaluations of the IE rules that generates an output of each operator of the IE rules. Based on the provenance graph, high-level rule changes (HLCs) of the IE rules are determined. Low-level rule changes (LLCs) of the IE rules are determined to specify how to implement the HLCs. Each LLC specifies changing an operator's structure or inserting a new operator in between two operators. Based on how the LLCs affect the IE rules and previously received correct results of applying the rules on the test documents, a ranked list of the LLCs is determined. The IE rules are refined based on the ranked list.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.