Towards a standard-based open data ecosystem: analysis of DCAT-AP use at national and European level. - Florian Barthélemy; Michael Cochez; Iraklis Dimitriadis; Naila Karim; Nikolaos Loutas; Ioannis Magnisalis; Lina Molinas Comet; Vassilios Peristeras; Brecht Wyns (Electron. Gov. an Int. J., 2022)