Draft response KK-15

Dear all,
 
I was drafting a response for KK-15, here's the draft:
 
http://www.w3.org/2009/sparql/wiki/CommentResponse:KK-15
 
Before I think we are ready to send this off though, I am afraid though I need
to clarify some issue on Bnodes in QuadPatterns which makes my head spin.

I will send this in a separate mail, not to confuse things.

Best,
Axel