Question on expected XQuery return per standards

[Michael Kay]

> My belief is that the standard requires that two nodes (p2, 
> p4) should be returned for result sets 1-4 below, because the 
> interpretation of the XPath should in each case be identical. 
> Set 5, on the other hand, should return only p2.

Yes, you're right. Anything else is a bug. I'm surprised - I thought cases
like this were pretty thoroughly covered in the XQuery test suite.

Michael Kay
http://www.saxonica.com/

> 
> We're seeing different behavior from a couple of XML parsers. 
> Anyone care to read from the stone tablets on this one?
> 
> (: begin query :)
> 
> let $xml :=
>   <root>
>     <div>
>       <p>p1</p>
>       <p>p2</p>
>     </div>
>     <div>
>       <p>p3</p>
>       <p>p4</p>
>     </div>
>   </root>
> 
> return (
>   <set1>{ $xml/descendant-or-self::node()/p[position() eq 2] }</set1>,
>   <set2>{ $xml//p[position() eq 2] }</set2>,
>   <set3>{ $xml/descendant-or-self::node()/p[2] }</set3>,
>   <set4>{ $xml//p[2] }</set4>,
>   <set5>{ $xml/descendant::p[2] }</set5>
> )
> 
> (: end query :)
> 
> David S.
> 
> --
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