The LISP version of Classic

LISP was the first language that was used to implement Classic. The LISP version of Classic is still the most powerful. It has role hierarchies, pruning, same-as and role-inverses in addition to the capabilities of NeoClassic. This version of Classic is useful for LISP research work.


  • Lori Alperin Resnick, Alex Borgida, Ronald J. Brachman, Deborah L. McGuinness, and Peter F. Patel-Schneider. ``CLASSIC Description and Reference Manual for the COMMON LISP Implementation: Version 2.3.'' AI Principles Research Department, AT&T Bell Laboratories, 1995.
  • Deborah L. McGuinness, Rich Thomason, Merryll K. Abrahams, Peter F. Patel-Schneider, Violetta Cavalli-Sforza, Cristina Conati and Lori Alperin Resnick. ``CLASSIC Knowledge Representation System Tutorial: Version 1.0.'' Artificial Intelligence Principles Research Department, AT&T Labs Research, and University of Pittsburgh, 1996.
  • D.L.McGuinness and A.Borgida. ``Explaining Subsumption in Description Logics,'' in Proceedings of the 14th International Joint Conference on Artificial Intelligence, August 1995.
  • Deborah L. McGuinness, Lori Alperin Resnick, and Charles Isbell. ``Description Logic in Practice: A CLASSIC Application'' in Proceedings of the 1995 International Joint Conference on Artificial Intelligence, August 1995. An extended version of this paper is available on-line in HTML.
  • Alexander Borgida and Deborah L. McGuinness. ``Asking Queries about Frames,'' in Proceedings of Fifth International Conference on the Principles of Knowledge Representation and Reasoning, Cambridge, Massachusetts, November, 1996. Also appears in Proceedings of International Workshop on Description Logics, Cambridge, Mass., November 1996.
  • Deborah L. McGuinness and Jon R. Wright. ``An Industrial Strength Description Logic-based Configurator Platform.'' IEEE Intelligent Systems, Vol. 13, No. 4, July/August 1998, pp. 69-77. abstract
  • Deborah L. McGuinness and Jon R. Wright. ``Conceptual Modeling for Configuration: A Description Logic-based Approach,'' Artificial Intelligence for Engineering Design, Analysis, and Manufacturing Journal - special issue on Configuration. 1998. Abstract
  • Thomas Kirk and Alon Y. Levy and Yehoshua Sagiv and Divesh Srivastava. "The Information Manifold", Working Notes of the AAAI Spring Symposium on Information Gathering from Heterogeneous Distributed Environments, 1995.
  • For more information write to Peter F. Patel-Schneider (

    Updated 23 July 1998 by Peter F. Patel-Schneider