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Combining Algebraic and Set-Theoretic Specifications (Extended Version)
Claus Hintermeier December 1996 |
Abstract:Specification frameworks such as B and Z provide power sets and cartesian products as built-in type constructors, and employ a rich notation for defining (among other things) abstract data types using formulae of predicate logic and lambda-notation. In contrast, the so-called algebraic specification frameworks often limit the type structure to sort constants and first-order functionalities, and restrict formulae to (conditional) equations. Here, we propose an intermediate framework where algebraic specifications are enriched with a set-theoretic type structure, but formulae remain in the logic of equational Horn clauses. This combines an expressive yet modest specification notation with simple semantics and tractable proof theory
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