Abstract

We describe how to express the dynamic semantics of a small subset of the Standard ML language in Natural Semantics. The present specification is based on a communication of R.Milner that describes the dynamic semantics of Standard ML in a structural style, and can be viewed as an example of the “programming effort” that is necessary to obtain an executable version of such a specification. The main aspects of Natural Semantics covered concern its relationships with typed inference systems and with some properties of natural deduction. The description has been tested on a computer but we do not give here details on the compilation techniques.

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