Re: [xsl] Is this node, the document root... best test?

[Stephen Cunliffe <scunliffe@xxxxxxxxxxxxxxxxxx>]

Thanks Michael and Wendell, etc.,

Okay, so I think i'm getting this now....

So, for any given XML document, (e.g. the fragment below),

I want to test, when i'm in the ((match"*" template, mode="xyz"))
If, I've "drilled" my way back up to the "document element node"???

Do I have the correct test below? or do I need the:
".. and not(parent::*)"
or
"parent::node()"



<?xml version="1.0"?>
<foo>
 <bar>
   <world>technology</world>
 </bar>
 <baz>
   <hello>bonjour</hello>
 </baz>
</foo>

In my XSL, I have (I've stripped out/simplified the irrelivant stuff):

<xsl:template match="/">
 ...
 <xsl:apply-templates select="./*" mode="abc"/>
 ...
</xsl:template>

<xsl:template match="*" mode="abc">
 ...
 <xsl:apply-templates select="./*" mode="abc"/>
 ...
</xsl:template>

<xsl:template match="*" mode="xyz">
 ...
 <!--
   check if this node, is (in the above case "foo")...
   which if I'm understanding correctly, is the "document element node"???
   which test, should I use?
 -->
 <xsl:choose>
   <xsl:when test="not(parent::*)">
     <!--
       break, do whatever (I need to know when this
       condition occurs, regardless, of what the name
       of my tag "foo" is called.
     -->
     So, for my sample, printing
     [<xsl:value-of select="name(.)"/>]
     will print: [foo]
   </xsl:when>
   <xsl:otherwise>
     <!-- continue, process this node's parent -->
     <xsl:apply-templates select="parent::*" mode="xyz"/>
   </xsl:otherwise>
 </xsl:choose>
 ...
</xsl:template>

Cheers,

Steve




On 10/20/2003 12:58 PM, Michael Kay wrote::

> > In a template, matching on "*", I need to test, if this node, is the 
> > document root node.
> >    
>
> Start by getting your terminology right! By reverse engineering your
> code, I think you are trying to test for the "outermost element": that
> is, the element whose parent is a root node, in XPath 1.0 terminology.
>  
>
> >    <xsl:when test="not(parent::*)">
> >      This works, but is it safe/efficient?
> >    
>
> This is fine, except that it will match both the root node and the
> outermost element node. If you want to match the outermost element
> without matching the root, use
>
> test=".. and not(parent::*)"
>
>  
>
> >    </xsl:when>
> >    <!-- Method (2) -->
> >    <xsl:when test="string(name(parent::*)) = ''">
> >      This works, but is it safe/efficient?
> >    
>
> This is clumsy. If parent::* selects anything, then it will select an
> element, and name() applied to an element is always a non-empty string,
> and string() applied to a non-empty string always gives you a non-empty
> string, so the test is equivalent to test="not(parent::*)".
>
> Michael Kay
>
>
> XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
>
>
>  


XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list