James W Peck

US Patent:

6502081, Dec 31, 2002

Filed:

Aug 4, 2000

Appl. No.:

09/633266

Inventors:

John T. Morelock - Beavercreek OH
Timothy L. Humphrey - Kettering OH
James M. Peck - Rockville MD
Salahuddin Ahmed - San Diego CA

Assignee:

Lexis Nexis - Dayton OH

International Classification:

G06F 1518

US Classification:

706 12, 707500

Abstract:

An economic, scalable machine learning system and process perform document (concept) classification with high accuracy using large topic schemes, including large hierarchical topic schemes. One or more highly relevant classification topics is suggested for a-given document (concept) to be classified. The invention includes training and concept classification processes. The invention also provides methods that may be used as part of the training and/or concept classification processes, including: a method of scoring the relevance of features in training concepts, a method of ranking concepts based on relevance score, and a method of voting on topics associated with an input concept. In a preferred embodiment, the invention is applied to the legal (case law) domain, classifying legal concepts (rules of law) according to a proprietary legal topic classification scheme (a hierarchical scheme of areas of law).