Abstract

We provide a precise mathematical definition for first-order views used in parameterised specifications and we also provide a dual semantics for them that captures both their syntactic and model theoretic effects. We show that this semantics is functorial. Parameter instantiation is defined here as a (special kind of) pushout in the category of views; moreover the corresponding pushout squares are shown to enjoy a crucial model amalgamation property that ensures the consistency of the parameter instantiation process.

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