DL.org Autumn School on Digital Libraries and Digital Repositories is designed for librarians and librarian decision-makers, information scientists, computer scientists, PhD students, early career researchers and young professionals working in the Digital Library (DL) and Digital Repository (DR) arena. Five DL.org Bursaries are available to PhD students, post-doctoral researchers and young professionals. The Autumn School focuses on modelling issues, practical solutions and best practices on interoperability. Participants will come away with a deeper understanding of digital libraries and digital repositories along the perspectives ofcontent, functionality, users, policy, quality and architecture, the six core domains captured in the Digital Library Manifesto, which stems from the DELOS Reference Model. The Autumn School also delivers valuable insights into how to address interoperability challenges.