  Generation of software from modeling languages such as UML and domain
specific languages (DSLs) has become an important paradigm in software
engineering. In this contribution, we present some positions on software
development in a model based, generative manner based on home grown DSLs as
well as the UML. This includes development of DSLs as well as development of
models in these languages in order to generate executable code, test cases or
models in different languages. Development of formal DSLs contains concepts of
meta-models or grammars (syntax), context conditions (static analysis and
quality assurance) as well as possibilities to define the semantics of a
language. The growing number and complexity of DSLs is addressed by concepts
for the modular and compositional development of languages and their tools.
Moreover, we introduce approaches to code generation and model transformation.
Finally, we give an overview of the relevance of DSLs for various steps of
software development processes.
