RE: Xpath expression: foo[-bar]

> In the XPath expression, how should foo[-bar] be parsed and 
> implemented?
> 
> Would it be the equivalent of:
>     foo[boolean(-number(./bar))]
> 
No, it means

 foo[position()=-number(./bar)]

which will be an empty set unless the string-value of the first child bar
element is a negative number.

Mike Kay


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