Unless the XSLT processor decides to "optimize" this and
makes the node global(static) -- moves it outside the scope
of the function....
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/>)
Michael Kay
http://www.saxonica.com/
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