> It is not a goal of this group to enable interoperability/federation between messaging applications beyond the key establishment, authentication, and confiden

> It is not a goal of this group to enable interoperability/federation between messaging applications beyond the key establishment, authentication, and confidentiality services. Full interoperability would require alignment at many different layers beyond security, e.g., standard message transport and application semantics. The focus of this work is to develop a messaging security layer that different applications can adapt to their own needs. From your link.