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RE: Higher-Order Functions in XPath 2.0

Subject: RE: Higher-Order Functions in XPath 2.0
From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx>
Date: Thu, 17 Jan 2002 16:14:28 -0000
RE:  Higher-Order Functions in XPath 2.0
> Point 3.) This essentially says there is currently no facility
> to iterate over two or more sequences in parallel rather than
> on the cartesian product. This is especially bad because
> there is no reasonable way to emulate this using the "for"
> operator.

Actually, you can do it, using something like

for $i in 1 to max((count($a), count($b))) return
  if-absent($a[$i], 0) + if-absent($b[$i], 0)

Mike Kay
> 

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