Résumé (EN)

Despite its promises, the lack of support for consistent coevolution of models with their meta-models andinstances prevents a broader adoption of MDE. This article presents a coevolution support for reflectivemeta-models and their instances tightly integrated into an executionplatform. The platform allowsstakeholders, developers and final users to define, update and run models and theirs instances concurrently.Design changes are reflected immediately in the running applications, hosted by the platform. Bothinstances and models are stored in a shared multi-version database that brings persistency, consistency andtraceability support. A web-based implementation of the platform validates the approach and sets thefoundations for a collaborative integrated development environment that evolves continuously.