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System Description: Twelf — A Meta-Logical Framework for Deductive Systems

  • Frank Pfenning
  • Carsten Schürmann
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1632)

Abstract

Twelf is a meta-logical framework for the specification, implementation, and meta-theory of deductive systems from the theory of programming languages and logics. It relies on the LF type theory and the judgments-as-types methodology for specification [HHP93], a constraint logic programming interpreter for implementation [Pfe91], and the meta-logic M2 for reasoning about object languages encoded in LF [SP98]. It is a significant extension and complete reimplementation of the Elf system [Pfe94].

Twelf is written in Standard ML and runs under SML of New Jersey and MLWorks on Unix and Window platforms. The current version (1.2) is distributed with a complete manual, example suites, a tutorial in the form of on-line lecture notes [Pfe], and an Emacs interface. Source and binary distributions are accessible via the Twelf home page http://www.cs.cmu.edu/~twelf.

Keywords

Logic Program Logic Programming Object Language Operational Semantic Deductive System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. DHKP96.
    Gilles Dowek, Thérèse Hardin, Claude Kirchner, and Frank Pfenning. Unification via explicit substitutions: The case of higher-order patterns. In M. Maher, editor, Proceedings of the Joint International Conference and Symposiumon Logic Programming, pages 259–273, Bonn, Germany, September 1996. MIT Press.Google Scholar
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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Frank Pfenning
    • 1
  • Carsten Schürmann
    • 1
  1. 1.Department of Computer ScienceCarnegie Mellon UniversityUSA

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