With \definereferenceformat[pin][left=(,right=)] it is possible to  
typeset references with
	\pin[ref] and get "(ref)"

I have two questions in this respect:

1. is it possible to change the general setup in the same way,
	e.g. let \in[ref] do the same as \pin[ref] here.
	The left and right are not in setupreferencing.

2. some strange interchange takes place when using \pin{A}{B}[ref].
	Instead of the expected "A (ref) B" one gets "A (refB);
	it therefore seems the right parenthesis from the setup comes too  
late in play.

Hans van der Meer