Article 5 sets the conditions for re-use: non-discrimination, transparency, no distortion of competition, anonymisation / pseudonymisation / secure-processing-environment requirements for protected categories (in particular personal data). Article 5(9) requires that any re-use of personal data under the Article 5 conditions retains the GDPR as the governing personal-data regime. Article 6 governs fees: re-use is generally free or limited to cost recovery; transparent and non-discriminatory fee structures.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.