Algebraic Specifications, Higher-Order Types, and Set-Theoretic Models

  • Authors:
  • Hélène Kirchner;Peter D. Mosses

  • Affiliations:
  • -;-

  • Venue:
  • AMAST '98 Proceedings of the 7th International Conference on Algebraic Methodology and Software Technology
  • Year:
  • 1999

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Abstract

In most algebraic specification frameworks, the type system is restricted to sorts, subsorts, and first-order function types. This is in marked contrast to the so-called model-oriented frameworks, which provide higher-order types, interpreted set-theoretically as Cartesian products, function spaces, and power-sets. This paper presents a simple framework for algebraic specifications with higher-order types and set-theoretic models. It may be regarded as the basis for a Horn-clause approximation to the Z framework, and has the advantage of being amenable to prototyping and automated reasoning. Standard set-theoretic models are considered, and conditions are given for the existence of initial reducts of such models. Algebraic specifications for various set-theoretic concepts are considered.