Formal operations for SDL language profiles

Expressive system modelling languages lead to language definitions that are long and hard to understand. Tool support for these languages is hard to implement, and often only parts of the language are supported. In this paper we introduce the concept of language profiles as well -defined subsets of a language with formal syntax and semantics as the basis for tool support. We outline two approaches to generate language profiles for SDL from the complete formal semantics definition, and provide a formalisation for a reduction-based approach, on which a tool for this approach is based.