Berlin Declaration on NFDI cross-cutting topics: as agreed on 15.08.2019 - Glöckner, Frank Oliver; Diepenbroek, Michael; Felden, Janine; Overmann, Jörg; Bonn, Aletta; Gemeinholzer, Birgit; Güntsch, Anton; König-Ries, Birgitta; Seeger, Bernhard; Pollex-Krüger, Annette; Fluck, Juliane; Pigeot, Iris; et al. (Zenodo, 2019)