Modern software for Enterprise Application Integration (EAI)provide tools for modeling integration scenarios. A drawback ofthese tools is the missing functionality to exchange or integratemodels of different EAI products. Consequently, developers candescribe real heterogeneous IT environments only partially. Ourgoal is to avoid the creation of these so-called ‘integrationislands’. For that purpose we present an approach whichintroduces an abstract view by technology-independent andmultivendor-capable modeling for both development andmaintenance. With this approach, we propose a toolset- andrepository-based refinement of the abstract view to automate theimplementation with real products and the deployment on realplatforms.