Hi there,
we are in the process of “establishing” an “Information exchange data model” for organizations and events.
Project title “fairsync”, result probably “Linked Open Actors”. Early adopters are kartevonmorgen.de (KVM) and https://wechange.de .
Current plan is to make organizations and events from both partners available in an RDF repository and provide a SPARQL endpoint.
I am still working on the documentation. A prototype already exists and the KVM data is already in an RDF repo.
Furthermore we are planning a Semantic Media Wiki. A few days ago we set up a test site, but there are still startup difficulties 
My plan would be to provide RDF data there. However, I see the difficulty to train and convince the authors to make their content available as structured data.
The topic of the wiki will be social-ecological change. It should not become a wikipedia competitor.
How the Wiki RDF data will be made available, I don’t know yet. I don’t know Semantic Media Wiki yet.