Per EHDS Articles 33-56: secondary use. Requirements include (a) implement secondary use of electronic health data for research + innovation + policymaking + statistics + (b) implement data access permits + Health Data Access Bodies (HDABs) + (c) implement secure processing environments + (d) implement opt-out where required + (e) implement minimisation + pseudonymisation + (f) cooperate with HDABs.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.