Ronald J. Brachman

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Ronald Jay Brachman
Born 1949 (age 66–67)
Institutions Harvard University
Yahoo! Research
AT&T Corporation
Alma mater Harvard University
Princeton University
Thesis A structural paradigm for representing knowledge (1977)
Doctoral advisor William A. Woods

Ronald Jay "Ron" Brachman (born 1949) is Chief Scientist of Yahoo! and head of Yahoo! Labs. He was formerly the Associate Head of Yahoo! Labs and Head of Worldwide Labs and Research Operations.


Brachman earned his B.S.E.E. degree from Princeton University, and his S.M. and Ph.D. degrees from Harvard University.


Prior to working at Yahoo!, he worked at DARPA as the Director of the Information Processing Techniques Office (IPTO), one of DARPA's eight offices at the time. While at IPTO, he helped develop DARPA's Cognitive Systems research efforts. Before that, he worked at AT&T Bell Laboratories (Murray Hill, New Jersey) as the Head of the Artificial Intelligence Principles Research Department (2004) and Director of the Software and Systems Research Laboratory. When AT&T split with Lucent in 1996, he became Communications Services Research Vice President and was one of the founders of AT&T Labs.

He is considered by some to be the godfather[citation needed] of Description Logic, the logic-based knowledge representation formalism underlying the Web Ontology Language OWL.]


He is the co-author with Hector Levesque of a popular book on knowledge representation and reasoning[1][2] and many scientific papers.[3][4][5]


  1. ^ Reiter, Ray; Brachman, Ronald J.; Levesque, Hector J. (1992). Knowledge representation. Cambridge, Mass: MIT Press. ISBN 0-262-52168-7. 
  2. ^ Levesque, Hector J.; Brachman, Ronald J. (2004). Knowledge representation and reasoning. Amsterdam: Elsevier/Morgan Kaufmann. ISBN 1-55860-932-6. 
  3. ^ List of publications from Microsoft Academic Search
  4. ^ Ronald J. Brachman's publications indexed by the DBLP Bibliography Server at the University of Trier
  5. ^ Ronald J. Brachman (1983) "What IS-A is and isn't. An Analysis of Taxonomic Links in Semantic Networks"; IEEE Computer, 16 (10); October.

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