ISA² [0] (Interoperability solutions for public administrations, businesses and citizens) uses various ontologies, like Core Vocabularies [1]. [0] https://ec.e

ISA² [0] (Interoperability solutions for public administrations, businesses and citizens) uses various ontologies, like Core Vocabularies [1]. [0] https://ec.europa.eu/isa2/solutions_en https://ec.europa.eu/isa2/solutions_en [1] https://ec.europa.eu/isa2/solutions/core-vocabularies_en https://ec.europa.eu/isa2/solutions/core-vocabularies_en (but maybe you meant this question in a more general sense, not specific examples)