  Smart grid interoperability is the means to achieve the twin green and
digital transition but re-mains heterogeneous and fragmented to date. This work
presents the first ideas and corner-stones of an Interoperability Roadmap for
the Energy Transition that is being developed by the Horizon Europe int:net
project. This roadmap builds on four cornerstones that address open
interoperability issues. These are a knowledge base to address the lack of
convergence among existing initiatives, a maturity model and a network of
testing and certification facilities to ad-dress the lack of practical tools
for the industry, and a governance process to address the gap between
standards-related approaches of Standards Development Organisations and
Research and Innovation projects. A community of practice will be set up to
ensure the continuity of the ongoing activities related to smart grid
interoperability. To outlive the duration of the int:net project, the aim is to
formalise the community of practice as a legal entity.
