Oh in addition to my earlier comments, I think the meaning of a
predicate
[ boolean valued-expression]
has changed a bit in the various drafts of XPath2, i can't
remember what
saxon 8.2 did.
the only change is that some expressions that were previously accepted are
now rejected as errors. For example
$x[1 to 5]
was equivalent to
$x[true()]
in previous drafts, but is now an error.
Michael Kay
http://www.saxonica.com/
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