position() is the 1-based index of the position of the current
context node within the current context.
given:
<foo>
<bar id="1">
<baz id="2">
<bar id="3">
</foo>
The position() of <bar id="3"> with the path /foo/bar is 2.
The easiest way to understand position() is to understand proximity
predicates.
/foo/bar[2]
is equiv to
/foo/bar[position() = 2]
position() is only relative to the current step of the location path,
and isn't a document-wide position indicator.
Though, in your case of //someelement[@id='S55'], I would've guessed
that position() would return 1, at least, since if you did find a unique
element, it's inherently the 1st element of the current context.
-bob
On Tue, 19 Mar 2002, Mark Hortman wrote:
>
> Can someone help a xpath newbie figure out a simple xpath expression?
>
> Upon learning that //someelement does not guarantee the order that things
> come back in are document order, I have switched tacts and decided to try to
> handle it my self. I was thinking about playing around with the position()
> function, but cannot get Jaxen to return the position of an element to me.
>
> I have tried
> //someelement[@id='S55']/position() but that returns 0 in all cases
>
> How can I determine the document order position of an element without
> walking the whole tree in JDOM?
>
> Any ideas?
>
> _______________________________________________
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> [EMAIL PROTECTED]
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