In this paper we introduce the toolchain topic as a federation of models based on an abstraction of dif ferents tool definitions. We consider the toolchain in the context of embedded systems, in particular the co-design which implies a co-engineering approach with many tools. Our main goal is to define a tool integration model to carry out an abstraction of several data formats and for a do main model as a reference vocabulary. This model gathers the concepts for managing the development process artif acts and the roles attributed to these artifacts over th e process. We have experimented this approach during the europ een ARTEMIS iFEST project over the OSLC layer (Open Services for Lifecycle Collaboration).