Specification Draft
GEISA hosts a live view of the specification as currently within the repository, available at https://spec.geisa.energy. This page also provides a PDF for offline use.
The official specification lives in the GEISA specification GitHub repository. The GitHub repository also includes schema files and the GEISA conformance test, an open source tool anyone can use to verify if an implementation follows the GEISA specification. It also hosts various mock-ups implementations and test apps that may help getting started with GEISA.