Data exchange for digital government: Where are we heading? ADBIS2021 KeynoteDraheim, DirkAdvances in Databases and Information Systems : 25th European Conference, ADBIS 2021, Tartu, Estonia, August 24–26, 2021 : proceedings2021 / p. 7-12 https://doi.org/10.1007/978-3-030-82472-3_2 Conference Proceedings at Scopus Article at Scopus Conference Proceedings at WOS Article at WOS