During the second half of 2014 it became apparent that there were a number of Hydra Partners and Users interested in developing page turner capability for their Hydra heads; some, with an urgent need, have already gone on to do so. This Interest Group is aimed primarily at those institutions who have been able to take a more leisurely approach and are still considering their options.
The team developing the new Fedora Common Data Model (formerly Hydra::Works) have noted that it would be relatively easy to make their gem offer such an interface. However, many people will not be using the FCDM in the foreseeable future and this Interest Group is aimed at them. No two Hydra heads are likely to take exactly the same approach to structuring their Fedora objects or to exactly what might be found in their Solr index. The purpose of this group, therefore, is to determine if it looks possible to design a "shim", an abstraction layer, to place over a Hydra stack such that it offers an IIIF Presentation API to the outside world but which, facing in the other direction, can gather the required information from a local Hydra that may be unique in nature, perhaps by offering some sort of configuration mechanism that points to where necessary data can be found and which offers default values for any mandatory data which the repository does not have.
It is hoped that the IG will agree on a way forward and that a Working Group could then be formed to develop the necessary software.
The IG will also investigate common patterns of object/relationship modeling and page sequence representation in Fedora/Solr currently in use by participating institutions. Examples of current practices will be made available, and the IG may choose to issue a set of recommendations and/or best practices for modeling a sequence of page images (or other objects) within the Hydra framework.