: HydroIdentifier.namespacehttp://inspire.ec.europa.eu/ont/hy# Create a prefix for http://inspire.ec.europa.eu/ont/hy# Hit Enter to save Double click to create a prefix | rdfs:domain | : HydroIdentifierhttp://inspire.ec.europa.eu/ont/hy# Create a prefix for http://inspire.ec.europa.eu/ont/hy# Hit Enter to save Double click to create a prefix | graph:default |