In response to #5: Are there examples of large scale solutions built on Jena ARQ/SPARQL without the use of the Jena API? Can we see their reference architectures?
I'm not sure this qualified but the Granatum project used SPARQL to query the data. It also used the Jena API in several other places, most notably to track which endpoints were up/down and their response time. This is a tacit acknowlagement of your point " Public SPARQL end-points are notoriously bad." The project implemented a preprocessor to the Jena Query Engine that distributed the queries across multiple endpoints to pick up the necessary data to answer the query. The entire user/researcher front end was SPARQL. https://aran.library.nuigalway.ie/xmlui/bitstream/handle/10379/4845/Linked_ Biomedical_Dataspace_-_Lessons_Learned_integrating_Data_for_Drug_Discovery_% 28Final%29.pdf?sequence=1 Claude -- I like: Like Like - The likeliest place on the web <http://like-like.xenei.com> LinkedIn: http://www.linkedin.com/in/claudewarren
