Advanced modelling made simple with the Gmodel metalanguage

Gmodel is a metalanguage that has been designed from the ground up to enable specification and instantiation of modelling languages. Although a number of metalanguages can be used for this purpose, most provide no or only limited support for modular specifications of sets of complementary modelling languages. Gmodel addresses modularity and extensibility as primary concerns, and is based on a small number of language elements that have their origin in model theory and denotational semantics. This article illustrates Gmodel's capabilities in the area of model-driven integration by showing that the Eclipse Modeling Framework Ecore language can easily be emulated. Gmodel offers support for unlimited multi-level instantiation in the simplest possible way, and any metalanguage emulated in Gmodel can optionally be equipped with this functionality.