It's not allowed to. In that respect, XSLT and XQuery are not purely
functional: node creation has a limited side-effect. This
comes out most strongly in XQuery, where you will see plenty
of tests in the test suite like
count(for $i in 1 to 10 return <a/>)
I meant of course to include an operator that eliminates duplicates, for
example
count(./(for $i in 1 to 10 return <a/>))
Michael Kay
http://www.saxonica.com/
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