On 12/03/2013, Mike Dalessio <[email protected]> wrote:
> I've opened a bug report here:
>
> https://bugzilla.gnome.org/show_bug.cgi?id=695699
>
> The summary is that behavior of `position()` under 2.9.0 is different than
> under 2.8.0 and other major XML libraries (e.g., javax.xml.xpath).
The 2.9 behaviour looks correct to me.
Given your sample document in the bug report, the logic is as follows:
//foo[position() = 1]
'//foo' selects (foo, foo, foo, foo)
the predicate picks out the first foo
//*[position() = 1 and self::foo]
'//*' selects (root, foo, foo, foo, foo)
on root, the predicates evaluates as [1 = 1 and ()] -> false
on the first foo, it evaluates as [1 = 2 and (foo)] -> false
and so on, so no node matches
> Please take a look at the bug report and let me know if any further
> information is necessary?
Which other xpath implementations did you try exactly? I'm curious
what saxon does.
Martin
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