IIIF at one end, OCFL at the other, Fedora in the middle.

The emergence of two standards – IIIF and OCFL (International Image Interoperability Framework and Oxford Common File Layout) – means that a complete digital preservation and delivery infrastructure can take a standards-based and open-source approach all the way through. We will show how the University of Leeds and Digirati have used existing software and newly developed components to deliver a system, as part of the University of Leeds' Digital Library Infrastructure Project (DLIP), that conforms to digital preservation best practices and is open to ad hoc application development and re-use. One key aspect of this is the use of Fedora as a gateway to OCFL and the ability for components other than Fedora to make use of this standards-based structure. The presentation will describe the project, problems it aims to address, the approach adopted and ask questions about the role of METS in between the two outer standards-based boundaries of IIIF and OCFL.