Re: Using node-sets in reverse document order?

Subject: Re: Using node-sets in reverse document order?
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Sat, 10 Jul 1999 11:23:10 -0700
At 99/07/10 13:44 -0400, Tony Graham wrote:
>The ancestor, ancestor-or-self, preceding, and preceding-sibling axes
>contain nodes in reverse document order.  How is it possible to
>iterate over the nodes in that order when xsl:for-each processes nodes
>in document order and xsl:sort sorts on string value, not document

By "walking" the source tree along the axis in the direction of the first
member of the context node list, rather than dealing with the context node
list as a whole.

>How can I do something like the following that will order the selected
>nodes in reverse document order?
>   <xsl:for-each select="from-ancestors(node())">
>     <p>Element: <xsl:value-of select="qname()"/></p>
>   </xsl:for-each>

My example below illustrates how.

I hope this helps.

.......... Ken

T:\FTEMP>type test.xml
<?xml version="1.0"?>
<a>This is a
<b>This is b
<c>This is c
<d>This is d
<e>This is e</e>
T:\FTEMP>type test.xsl
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="";>

<xsl:template match="/">                    <!--root rule-->
    <xsl:apply-templates mode="start" select="//e"/>

<xsl:template mode="start" match="*">
    <xsl:text>&#xa;Document Order:</xsl:text>
    <xsl:for-each select="from-ancestors(*)">
      <xsl:text>&#xa;Element: </xsl:text>
      <xsl:value-of select="qname()"/>

    <xsl:text>&#xa;&#xa;Axis Order:</xsl:text>
    <xsl:apply-templates select="from-ancestors(*[1])"/>

<xsl:template match="*">
    <xsl:text>&#xa;Element: </xsl:text>
    <xsl:value-of select="qname()"/>
    <xsl:apply-templates select="from-ancestors(*[1])"/>


T:\FTEMP>call xsl test.xml test.xsl test.txt
T:\FTEMP>type test.txt

Document Order:
Element: test
Element: a
Element: b
Element: c
Element: d

Axis Order:
Element: d
Element: c
Element: b
Element: a
Element: test

G. Ken Holman                    mailto:gkholman@xxxxxxxxxxxxxxxxxxxx
Crane Softwrights Ltd.   
Box 266, Kars, Ontario CANADA K0A-2E0   +1(613)489-0999   (Fax:-0995)
Website:  XSL/XML/DSSSL/SGML services, training, libraries, products.
Publications:   Introduction to XSLT (3rd Edition) ISBN 1-894049-00-4
Next instructor-led training:   MS'99 1999-08-16  MT'99 1999-12-05/06

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