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Re: RE: Higher-Order Functions in XPath 2.0

Subject: Re: RE: Higher-Order Functions in XPath 2.0
From: Dimitre Novatchev <dnovatchev@xxxxxxxxx>
Date: Thu, 17 Jan 2002 11:56:39 -0800 (PST)
if absent xpath
> > 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)

To be strict, it seems that $a[$i], where $a contains a sequence (not a
node-set) is not valid syntax according to the current WD. Or am I

Another point: How can we produce ***more than one*** sequence in

For example, how to produce both:

($a(i) + $b(i))-sequence
($a(i) * $b(i))-sequence

In only one pass over $a and $b ?

Dimitre Novatchev.

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