On 10/6/05, Michael Kay <mike@xxxxxxxxxxxx> wrote:
> Here are five ways to sum over a computed quantity:
>
> * In XPath 2.0, use sum(for $i in data return substring($i,7,4))

Of course, Mike meant:

sum(for $i in data return xs:double(substring($i,7,4)))


Cheers,
Dimitre Novatchev