*This deliverable has not yet been officially approved by the European Commission and should be considered a draft Drawing from the preparatory work conducted in D2.1 (Interoperability & Data Sharing) and D2.4/D2.5 (ETDS Architecture), this deliverable moves the project into its technical execution phase. Deliverable D2.2 presents the detailed design and implementation strategy for the ETDS prototype, which will be progressively implemented throughout the DEPLOYTOUR project. As a first step in this process, the deliverable defines a Minimum Viable Data Space (MVDS) a functional implementation focused on core components and technical validation.