<p>Thesauri are used to tag semi-structured documents, texts, while more complex semantic structures are used to describe (annotate) scientific data. We are creating a Global Agricultural Concept Scheme (GACS) by mapping AGROVOC, CABT and NALT Ð three major thesauri in the area of food and agriculture, with a beta release in May 2016. We see GACS as a hub linking user-oriented thesauri with semantically more precise domain ontologies linking, in turn, to datasets about food and agriculture, in order to make that data more interoperable and reusable</p>