Hi, I would like to provide a SPARQL endpoint over a virtual dataset. For the IRIs in the dataset, I can compute anything known about them based on the IRI itself. So rather than materializing the whole thing, I want to just respond to triple pattern queries and generate the data on the fly. I can see how I might implement the Model or Graph interfaces to support this, but wondering if there is another API I should use that would be most efficient for backing a SPARQL endpoint. For example, I could calculate counts for particular triple patterns without iterating through all the results. Or as another example I could imagine implementing certain joins involving two triple patterns more efficiently than by generating the data for both.
Thank you, Jim
