Document comparison using multiple similarity measures
US7472121B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2005 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Oct 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F40/194
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a method for comparing documents. The method includes the steps of: determining a plurality of similarity measures; and determining an overall similarity measure for the plurality of documents, based on the plurality of similarity measures. In one embodiment, the similarity measures are chosen from the group of similarity measures consisting of semantic and reference similarity measures. When comparing documents from the chemical, biochemical or pharmaceutical domains, the determination of the similarity utilizes a determination of structural similarity of the chemical formulas described in the plurality of documents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.