Jeni's Musings

My understanding is that the open world is the reason that aggregate never made it into SPARQL the first time around. But as you say, that’s being rectified now. Many existing SPARQL implementations support some form of aggregates, so rather than get frustrated with what I’d suggest (clearly with a bias) is a very healthy and relatively quick standards process, I’d suggest you ask the implementors of your SPARQL engine of choice if they can add aggregate support. Most existing implementations are pretty close to one another in terms of both semantics and syntax, so there should be a pretty low cost to adopting this feature before all the paint has dried on this round of standardization.

Lee