Re: [xsl] Iterating over all the Ancestors

Subject: Re: [xsl] Iterating over all the Ancestors
From: "bix xslt" <bix_xslt@xxxxxxxxxxx>
Date: Tue, 26 Nov 2002 22:36:54 +0000
Thanks Wendell!

Suppose I wanted to stop at a given node or after a certain number of ancestors. What would I do to tweak your original solution?

From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] Iterating over all the Ancestors
Date: Tue, 26 Nov 2002 13:47:50 -0500


Walking up the tree is easy:

<xsl:for-each select="ancestor::*">

walks all the elements up to the root (but not including it: it's not an element). You can include the context node itself by using the ancestor-or-self:: axix.

So in your case

<xsl:template match="data">
<xsl:for-each select="ancestor-or-self::*">
<xsl:if test="ancestor::*">
<!-- if the ancestor element has an ancestor element, it's not
first: prepend it with some formatting -->
<xsl:text> -> </xsl:text>
<xsl:value-of select="text"/>
<!-- reports the value of the <text> element child, which is our label -->

By default, a for-each traverses in document order, so this will go top-down. (There are ways to tweak it if you want something different.)

I hope this helps,

At 01:19 PM 11/26/2002, you wrote:
I have been trying to figure out a way of iterating over the parent nodes of a particular child all the way to the root of the tree.
Essentially, I'd like to display the path which I have taken to get to the current child, but I would like to do it in such a way that at a future point in time, I can modify my style sheet to include hyperlinks at each parent node. An example xml file would be:

<data><text>Title for web page</text>
       <data><text>White Pages</text></data>
           <data><text>Legacy Software</text></data>

Suppose that we are at the following X-Path:
   /<root data>/<Design data>/<Interfaces data>/<Hardware-Software data>

I would like to develop a template that essentially displays the path above in the following way:

Title for web page -> Design -> Interfaces -> Hardware-Software

At each point, if I added a <href> node within the xml tree as a child of the <data> element, then I would like to be able to hyperlink each individual node...


Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.      
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
  Mulberry Technologies: A Consultancy Specializing in SGML and XML

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