FAIR sub-principle – EHDS Alignment Mapping Table

This study applies a dual-layer evaluation framework to assess FAIR alignment within the European Health Data Space (EHDS). The analysis distinguishes between (i) the regulatory layer defined by Regulation (EU) 2025/327 and (ii) the technical implementation layer operationalized through HealthData@EU and HealthDCAT-AP. Each FAIR sub-principle is independently scored at both layers using a four-point scale (0–3) and assigned an alignment label of Gap (0: not addressed), Implicit (1: weakly supported), Partial (2: partially supported), or Direct (3: fully satisfied). The score assigned reflects effective FAIR compliance at the ecosystem level, defined as the maximum alignment achieved across the two layers. This approach allows differentiation between legally mandated FAIR properties and those realized through infrastructure design.