The German article on document management systems lists a few free and proprietary DMSs. It might offer something that fits? https://en.wikipedia.org/wiki/Docu

The German article on document management systems lists a few free and proprietary DMSs. It might offer something that fits? https://en.wikipedia.org/wiki/Document_management_system https://en.wikipedia.org/wiki/Document_management_system https://de.wikipedia.org/wiki/Dokumentenmanagement#Dokumentenmanagementsysteme https://de.wikipedia.org/wiki/Dokumentenmanagement#Dokumente...