It seems that you are trying to obtain the scalar product of
two vectors:
X = {x1, x2, ... , xn}
Y = {y1, y2, ... , yn}
X.Y = x1.y1 + x2.y2 + ... + xn.yn
If that is indeed the requirement (and I wasn't able to work it out from the
posting) then it can be done in XPath 2.0 (without any help from FXSL) as
sum(for $i in 1 to count($x) return $x[$i] * $y[$i])
Michael Kay
http://www.saxonica.com/
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