Re: reverse and forward order

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Subject: Re: reverse and forward order
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Date: Fri, 11 Apr 2003 14:53:58 -0400

At 10:57 AM 4/11/2003, David wrote:

What Dave means about paremthesese is

ancestor::*[1] gives you the first ancestor in reverse document order
               ie your parent
whereas
(ancestor::*)[1] gives you your first ancestor in document order, ie
                your most ancient ancestor; Adam (or Eve) in some
               cultures.

This leads to a bit of funniness, so that

ancestor::*[1] gives you what Dave says

preceding::*[1] gives you the most recent preceding element

(ancestor::*|preceding::*)[1] gives you the first of the union of both node sets, in document order, namely the document element

so if you want to get the <preceding> element here

<ancestor>
  <preceding>I'm preceding<preceding>
  <node>I'm the context node</node>
</ancestor>

but the <ancestor> element here

<preceding>I'm preceding<preceding>
<ancestor>
  <node>I'm the context node</node>
</ancestor>

you have to do (ancestor::*|preceding::*)[last()]

Cheers,
Wendell


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     the directors, like the sparrows, which I perceive use it
     extensively for a perch." -- Thoreau

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Current Thread

reverse and forward order
- I-Lin Kuo - Fri, 11 Apr 2003 10:12:14 -0400 (EDT)
  - David Carlisle - Fri, 11 Apr 2003 10:53:15 -0400 (EDT)
    - Wendell Piez - Fri, 11 Apr 2003 14:50:59 -0400 (EDT) <=
    - Andrew Watt - Fri, 11 Apr 2003 16:03:22 -0400 (EDT)
      - David Carlisle - Fri, 11 Apr 2003 18:59:03 -0400 (EDT)
  - Michael Kay - Fri, 11 Apr 2003 14:12:17 -0400 (EDT)
    - Andrew Watt - Fri, 11 Apr 2003 15:48:52 -0400 (EDT)

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Re: reverse and forward order, David Carlisle	Thread	Re: reverse and forward order, Andrew Watt
RE: namespace declarations in, Michael Kay	Date	Re: Is possible to get extern, Wendell Piez
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