1. Workshop goals Promote learning: –exchange info; stimulate ideas for cooperation; add to collective knowledge base Help NDIIPP/JISC plan the future: –Bring together perspectives –Map areas that need attention –Identify opportunities for collaboration

2. Distributed Infrastructure, Interoperability models and services Begin with questions: –What do we mean by interoperability? –What do we think the Waters interoperability gap is ? –What value does interoperability have to the preservation community? –How do we assess and test interoperability?

3. Random points: what is it ? Machine layers, network layers, user expectations Common interfaces so we can interwork Common interfaces so we can change components at will Does it mean standards - yes, in part, but it is wider than that Its sharing - in real time and across time Its tools, reusable and shareable

4. Where is the gap? Its about shared understanding - even where standards or models exist Its there because interoperability has costs - is sub-optimal –so when is the right time to optimise? Think of leverage: when are we different for no good reason? When does it help reduce costs, or reach other communities?

5. Wheres the value? Can drive down costs if we all do what we are best at –but were not all agreed on this –maybe not at right stage of maturity yet Training = building skill sets - harder when no consistency Low-level interoperability more valuable in short term

6. Assess and test Do we want to ? Can we ? Yes, where its about standards Not essential, but very useful Dont assume passing the test means perfection - plan for failure of interoperability

7. A 5 layer model? Bits Metadata Application & performance Policy Social –are these layers, or is it really a spiral, and is it helpful to decompose like this anyway?

8. Some discussion points Do we really want distributed infrastructure ? Is interoperability simply defined by saying it is what is needed to make distributed infrastructure work? How do we establish appropriate trust models? How to make costs and benefits of interoperability more coincident? Diversity is key: monoculture/groupthink is becoming a problem

9. More discussion points Role of interoperability vs distributed workflow Scalability limits of distributed infrastructure: scarcity or value of the resources distributed Role of standards to promote or constrain diversity