RE: RE: unique question

> But the unique is still not working - in any combination...

I can feel your frustration, but the only way to proceed is to show us
something that isn't working, to explain what you mean by "not working", and
we can then explain to you what you did wrong. You've shown us one wrong
schema and had two responses telling you why it was wrong; I suggest you
correct that error and try again.

Michael Kay
http://www.saxonica.com/