Glossary → Ubiquitous Language
In the comment above @helge quotes from my toot about having a Glossary. We NEED a glossary.
But we need more than that. In FEP Process: Guaranteeing an open and decentralized ecosystem - #23 by aschrijver I describe how we may model our own domain using Domain Driven Design (DDD), and also that DDD is useful practice for creating AP extensions.
So, the portal may go a bit further than providing the Glossary, and offer a comprehensive explanation of our domain with diagrams etcetera.