17 years of PHAIDRA at the University of Vienna. Opportunities and challenges of managing an open repository at a large and heterogeneous university.

Since 2008, the University of Vienna has been using a repository that is open to all disciplines and to all academic and administrative staff. This opens up many possibilities in the area of research data management, as data can be blocked or opened for certain groups of people at any time, if this is necessary for legal or ethical reasons. The content of the repository can also be linked in different ways, for example, publications and research data can be linked together. A number of metadata standards are provided to allow a very rich description of the objects. At the same time, there are a number of challenges to overcome in order to serve all interested parties and disciplines equally. In addition to technical, structural and financial challenges, the service has to be constantly adapted to different needs. The presentation will take a closer look at these challenges, focusing on solution strategies and positive results in terms of successful collaboration with researchers.