[NEW ISSUE] Indicating D-entailment

Since we support at least two entailment regimes, Simple entailment  
with and without D-Entailment, we should at least have a discussion  
how you indicate under which entailment regime you wish your query to  
be evaluated. I understand that a common view (from which I dissent)  
is that entailment regimes are determined by the server on a per  
dataset basis, and that proponents of this view expect this to be  
described by some server metadata (e.g., SADDLE). I don't believe we  
have formal group consensus on this point. (I would prefer to be able  
to specify it in my query and have a server which doesn't support an  
entailment regime that I request to fault.)

In either case, however, we should have some language saying that,  
currently, there is no spec sanctioned way to determine under which  
entailment regime a query will be evaluated.

I think this could be merely editorial.

Cheers,
Bijan.