The Institute of Medical Informatics develops and operates the Medical Data Models Portal (MDM Portal). The portal can be reached at the following URL: https://medical-data-models.org/

Further information:

Riepenhausen S, Blumenstock M, Niklas C, Hegselmann S, Neuhaus P, Meidt A, Püttmann C, Storck M, Ganzinger M, Varghese J, Dugas M. 
Europe's Largest Research Infrastructure for Curated Medical Data Models with Semantic Annotations. 
Methods Inf Med. 2024 May;63(1-02):52-61 | https://doi.org/10.1055/s-0044-1786839)