Information-theory based measure of similarity between instances in ontology
US7792838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2007 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | May 31, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/367
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Improved information processing techniques for measuring similarity between instances in an ontology are disclosed. For example, a method of measuring similarity between instances in an ontology for use in an information retrieval system includes the following steps. A set of instances from the ontology is obtained. At least one of the following similarity metrics for the set of instances is computed: (i) a first metric that measures similarity between instances in the set of instances with respect to ontology concepts to which the instances belong; (ii) a second metric which measures similarity between instances in the set of instances where the instances are subjects in statements involving a given ontology property; and (iii) a third metric which measures similarity between instances in the set of instances where the instances are objects in statements involving a given ontology property. At least one taxonomy induced by the at least one computed similarity metric is stored, wherein the at least one induced taxonomy is usable for responding to requests submitted to an information retrieval system. When two or more of the first metric, the second metric and the third metric are c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.