https://www.w3.org/TR/vocab-dcat-2/ http://rml.io/ https://github.com/ruby-rdf/rdf-vocab https://www.boe.es/diario_boe/txt.php?id=BOE-A-2013-2380 https://joinup.ec.europa.eu/solution/dcat-application-profile-data-portals-europe https://github.com/ckan/ckanext-dcat Look at DCAT in: - Zaragoza - Irekia