Klang, MarcusNugues, PierreTiedemann, JörgTahmasebi, Nina2023-09-222023-09-222017ISSN 1736-6305 (Online)https://hdl.handle.net/10062/92948engopenAccessAttribution-NonCommercial-NoDerivatives 4.0 InternationalDocforia: A Multilayer Document ModelArticle