On Mon, 2008-04-28 at 23:44 +0100, David Carlisle wrote:
How does it know there is no value to do the grouping?
There always is a value. The grouping is not (directly) on the attribute
value (which may not be there) but on the string value of the
expression, which always (in this case) has a non empty value, the value
returned by current-grouping-key() and displayed in your condition=
attribute.
Ahhh... OK that makes sense. I think this got me to a new point in
understanding v 2.0.
thanks!
David
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