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RE: [xsl] XPath preceding

Subject: RE: [xsl] XPath preceding
From: "Rick Quatro" <rick@xxxxxxxxxxxxxx>
Date: Mon, 9 Apr 2012 14:35:49 -0400

Hi Michael,

As Wendell pointed out, this should work according to the XPath spec.
However, I am using it with FrameSLT (an XPath plugin for Adobe FrameMaker)
and apparently there is a bug where the preceding axis doesn't work if the
elements have different parents. It actually works like preceding-sibling. I
have to send Russ a bug report.

Wendell, a belated thanks for your quick reply.


-----Original Message-----
From: Michael M|ller-Hillebrand [mailto:mmh@xxxxxxxxxxxxx]
Sent: Monday, April 09, 2012 2:28 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] XPath preceding

Hi Rick,


> the preceding axis contains all nodes in the same document as the
> context node that are before the context node in document order,
> excluding any ancestors and excluding attribute nodes and namespace
> nodes

If you have access to XPath 2 you could use he new << and >> operators, but
I guess you have not. So if I read on in the spec:

> NOTE: The ancestor, descendant, following, preceding and self axes
partition a document (ignoring attribute and namespace nodes): they do not
overlap and together they contain all the nodes in the document.

I would assume you have to built something like this:

preceding::case-cite or ancestor::*//case-cite

as ancestors (and their descendants) are also before the current node in
document order but not part of the preceding:: axis.

- Michael

Am 09.04.2012 um 17:09 schrieb Rick Quatro:

> Hello,
> I am trying to find a particular element that is anywhere before the
> current element like this:
> preceding::case-cite
> This works if the two elements have the same parent, but I want to
> match an element anywhere before the current element. For example, if
> the context is the <case-cite-2nd> element, I want to find a
> <case-cite> element anywhere in the structure previous to the
<case-cite-2nd> element.
> <root>
>  <section>
>    <para>
>      <case-cite/>
>    </para>
>    <para>
>      <case-cite-2nd/>
>    </para>
>  </section>
> </root>
> Thanks in advance.
> Rick Quatro

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