Or be prepared for all kinds of a nasty surprise following the fact
that the value of
my:f($x) is my:f($x)
is generally not guaranteed to be true()
Yes indeed. The folks writing the formal semantics have been having fun with
this - as have the folks writing optimizers, and those writing test suites
;-)
It's not really any worse than the fact that (in XQuery notation) (<a/> is
<a/>) return false. In fact, the problem is even there in XSLT 1.0.
Michael Kay
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