> Yes, the plan is to have a whitelist of SPARQL endpoints for which we
> allow federation queries. I was going to post about it in January when
> everybody's back from vacations :)

I'm very curious to see how this will fare.
Federation is where I think public SPARQL endpoints will fail,
so it will be worthwhile to see what happens.

> The use case for LDF is both running long queries and federation. The
> first use case of course would benefit from good SPARQL engine running
> on a machine with decent connectivity. So server-side JS or Java should
> probably fare better.

Actually, probably not:
– The V8 JavaScript engine is as fast in the browser as with Node.js.
   Furthermore, query execution in the browser happens in a background worker,
   and the UI has been designed for minimal impact.
– The Java implementation is based on Jena,
   which is an engine built with very strong assumptions
   that do not necessarily hold for TPF.

The main impact I see is latency (California <=> Europe),
which can be mitigated with caching and/or HTTP/2.

Best,

Ruben


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