[...] * However, data-driven policy making stresses the importance of big data and open data sources into policy making as well as with co-creation of policy by involving citizens to increase legitimacy (Bijlsma et al 2011) and decrease citizens’ distrust in government (Davies 2017). In this respect, data availability is of great importance, but even more is data relevance. You can have nice (big) open data sources (e.g. Copernicus, weather data, sensor data). But policy making asks for totally different assets