High competition pressures Telecommunications service providers to reduce their concept-to-market time. To manage more easily service complexity among several actors in the design process and to ensure a more flexible maintainability, service decomposition into stakeholder dedicated views is now largely investigated by companies. However, there is still a lack of tools to fully support and implement this approach in various domains, especially Telecommunications. Consequently, in this position paper, we defend using a Domain Specific Modeling Language for each viewpoint, and regrouping them into a family of modeling languages relying on a meta-modeling approach. To ensure better interaction and coherence between the various viewpoints, we focus on some interoperability issues early at design time. To adequately and systematically manage interoperability between distinct graphical models, interoperability between their meta-models should be established as well. For this we rely on model transformations between meta-models. However, most often model transformations address only the syntactic level. To increase the formality of languages and of their interoperability, semantics must be taken into consideration as well. Therefore, we propose lifting the meta-models into ontologies, enriching and matching them into shared ontologies. This allows for semi-automatic generation of model transformations from shared ontologies.