Transformations of denotational semantics in semantics directed compiler generation

In semantics-directed compiler generation one is faced with the problem of how to translate a source semantic definition of a programming language into on equivalent target semantics closer to an implementation. Most of the existing works solve this problem in a non constructive way : a target semantics is exhibited first and then only proved correct against the source. We try to show that target semantics can be derived from source semantics in a constructive way and so that some correctness ideas are automatically preserved. The framework is denotational semantics.