test="not(b[not(c)])"

That worked!  Thanks so much, David, for patiently figuring out what I
was trying to do, even though I couldn't articulate it clearly.

Best regards,
Mark


On Fri, Jun 5, 2009 at 9:16 AM, David Carlisle<davidc@n...> wrote:
>
>
>> I'm trying to determine whether no instance of <c/> exists for each
>> <b/> set.
>
> what do you actually mean by this
>
> test="not(b/c)"
>
> is true if there are no c grandcildren.
>
> If you mean that you want the test to be true unless
> that every b child has a c child then that's
> not the case taht there is a b that has not got a c so:
>
> test="not(b[not(c)])"
>
>
> David
>
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