Re: [xsl] backwards tree-traversal algorithm?

[Stephen Cunliffe <scunliffe@xxxxxxxxxxxxxxxxxx>]

This isn't quite what you want, but it may help...

Define this template first:
<xsl:template match="*" mode="whereAmI">
<xsl:param name="location"/>
   <xsl:choose>
       <xsl:when test="name(.) = 'root'">Location = <xsl:value-of 
select="name(.)"/> / <xsl:value-of select="$location"/> </xsl:when>
       <xsl:otherwise>
           <xsl:apply-templates select="parent::*" mode="whereAmI">
               <xsl:with-param name="location"><xsl:value-of 
select="name(.)"/><xsl:if test="string($location) != ''"> / 
<xsl:value-of select="$location"/></xsl:if></xsl:with-param>
           </xsl:apply-templates>
       </xsl:otherwise>
   </xsl:choose>
</xsl:template>

Then, when you need to know "where you are", call this one.

<xsl:apply-templates select="." mode="whereAmI"/>


It should return *if* 'inside' <c/> (with your data)...

"Location = root / a / b / c"

Cheers,

Steve

On 10/23/02 10:22 AM, jm3 wrote::

> hello, having some trouble making this work: within my stylesheet,
> i have selected a node somewhere in the midst of the document tree,
> several nested elements deep.  what i would like to do is, given
> this node N (at arbitrary depth), walk *back* up the document tree
> hierarchy, element by element, printing the successive parent elements
> (technically, printing each element's "name" @ribute).
>
> so with node N being <c> and the following document:
>
> <root>
>  <a>
> 	  <b>
> 		  <c/>
> 		</b>
> 		<d/>
> 		<e/>
> 	</a>
> </root>
>
> i want to print: b, a, root.
>
> my pseudocode was along the lines of:
>
> current = node
> while current != root
>  current = ../
> 	print current/@name
>
> seems simple.
>
> recursive templates seemed like the way to do this in xsl, but i
> can't get this to do anything, apparently because the processor i'm
> using (sablotron 0.90) won't let me use XPath on the node set i am
> passing with call-template (as a param) because it's "not a node-set".
>
> so i guess i have two questions:
>
> 1. what is the best algorithm/approach to walk back up the parent:: tree, printing each element?
>
> 2. does sabcmd not have a node-set() function? is this what's stopping me?
>
> (if it helps, the stylesheet will know what depth level the current
> node is at, and the unique @name attribute of each parent element.)
>
> jm3 / john manoogian III / http://jm3.net / jm3@xxxxxxx 
>
>        > > > http://jm3.net/linkworld < < <
>
> XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
>
>
>  



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