sum « XSLT stylesheet « XML Tutorial

5.13.sum
	5.13.1.	sum()- Takes a node-set as its argument and returns the sum of the value of each individual node after converting the values to a numeric type if possible.
	5.13.2.	round the result of sum()
	5.13.3.	Sum value
	5.13.4.	sum() sums all numbers in selected nodes.
	5.13.5.	sum only odd ones

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