International audienceWhen designing a hardware or a software system, the inte-gration of domain constraints becomes a determining factor to ensurea great match with the system requirements. This domain knowledge ismost often modelled using ontologies that allow to express the domaindata properties. In this paper, we propose an approach to integrate do-main ontologies into a system development process based on Event-B. Itconsists to annotate Event-B models using the ontology concepts, thisassumes a formalization of the domain ontology in the Event-B method.Therefore, we propose an extensible generic transformation approachwhich develops an Event-B specification based on an ontology describedin an ontological language. The integration of the...