HRO-DCAT-AP.de defines a DCAT-AP profile that needs to be layered on top of euro_dcat_ap, as defined in ckanext-dcat. It builds on both ckanext-dcatde and ckanext-dcatde_berlin and works without database conversion while keeping the CKAN core untouched. The extension is fully conformant to DCAT-AP.de 2.0 and includes HVD (High-Value Datasets) metadata mapping support.