Tools for an extended object modelling environment

MDA promises a high software return on investment by producing software that evolves easily and is more portable and interoperable. However, MDA has a high price, namely, the need for a unified modelling infrastructure and a rich range of tools to create, maintain and transform models. Without these, model-driven development will not be able to deliver on its promises. This paper presents a common modelling infrastructure plus a collection of tools that, operating on it, can be used to create, edit and interchange models at any abstraction level. By using these tools and the modelling infrastructure, model-driven development is more likely to deliver.