Research Dataset (Anonymised/Pseudonymised) represents health datasets that have been anonymised or pseudonymised from the primary-use clinical records held in the MyHealth@MyHands system, prepared for secondary use by authorised researchers, policy makers, or public health authorities . Research Datasets are derived from primary clinical datasets through de-identification processing in the Secure Processing Environment, are described using HealthDCAT-AP for registration in HDAB-managed national catalogues, and are accessed only through HDAB-issued Data Access Permits.