Ronald J. Brachman

Ronald Jay "Ron" Brachman (born 1949) is the director of the Jacobs Technion-Cornell Institute at Cornell Tech.[1] Previously, he was the Chief Scientist of Yahoo! and head of Yahoo! Labs. Prior to that, he was the Associate Head of Yahoo! Labs and Head of Worldwide Labs and Research Operations.

Ronald Jay Brachman
Born1949 (age 71–72)
Alma materHarvard University
Princeton University
Scientific career
InstitutionsHarvard University
Yahoo! Research
AT&T Corporation
ThesisA structural paradigm for representing knowledge (1977)
Doctoral advisorWilliam A. Woods


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!, Brachman 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[2][3] and many scientific papers.[4][5][6]


  1. ^ "Ron Brachman Joins the Jacobs Technion-Cornell Institute at Cornell Tech as the New Director". Cornell Tech. 25 May 2016. Retrieved 2016-05-25.
  2. ^ Reiter, Ray; Brachman, Ronald J.; Levesque, Hector J. (1992). Knowledge representation. Cambridge, Mass: MIT Press. ISBN 978-0-262-52168-0.
  3. ^ Levesque, Hector J.; Brachman, Ronald J. (2004). Knowledge representation and reasoning. Amsterdam: Elsevier/Morgan Kaufmann. ISBN 978-1-55860-932-7.
  4. ^ Ronald J. Brachman publications indexed by Microsoft Academic
  5. ^ Ronald J. Brachman at DBLP Bibliography Server  
  6. ^ 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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