LOD2 Use Cases

Here we create high level descriptions of what we want to have CKAN do as part of ​LOD2. For the pedantic, perhaps these are user stories rather than use cases as such. Whatever they are, they need to be elaborated in the context of the current state of CKAN and the current development requirements. They should serve as a medium term (2 years) goal for what we want to have accomplished at a technical level so that even before we embark on implementing them they can guide current work.