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Refining specifications to logic programs

  • I. J. Hayes
  • R. G. Nickson
  • P. A. Strooper
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1207)

Abstract

The refinement calculus provides a framework for the stepwise development of imperative programs from specifications. In this paper we study a refinement calculus for deriving logic programs. Dealing with logic programs rather than imperative programs has the dual advantages that, due to the expressive power of logic programs, the final program is closer to the original specification, and each refinement step can achieve more. Together these reduce the overall number of derivation steps.

We present a logic programming language extended with specification constructs (including general predicates, assertions, and types and invariants) to form a wide-spectrum language. General predicates allow non-executable properties to be included in specifications. Assertions, types and invariants make assumptions about the intended inputs of a procedure explicit, and can be used during refinement to optimize the constructed logic program. We provide a semantics for the extended logic programming language and derive a set of refinement laws. Finally we apply these to an example derivation.

Keywords

Logic Program Logic Programming General Predicate Recursive Call Horn Clause 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • I. J. Hayes
    • 1
  • R. G. Nickson
    • 1
  • P. A. Strooper
    • 1
  1. 1.Department of Computer ScienceThe University of QueenslandBrisbaneAustralia

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