RE: Tree Fragment - How do I test it AND output it?

David,
Not sure what you mean (it's early). You can't do both. Well you can but
you can't recurse returning a value to the calling template and output
nodes to the result tree at the same time. Here are a few examples that
show a few things you can do.

<?xml version="1.0" ?>
<values a="3" b="5">
</values>


<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:msxsl="urn:schemas-microsoft-com:xslt"
extension-element-prefixes="msxsl"
>
	<xsl:template match="/values">
		<xsl:variable name="resultFromTemplateValue">
            <xsl:call-template name="namedTemplateValue"/>
        </xsl:variable>
		<xsl:variable name="resultFromTemplateRtf">
            <xsl:call-template name="namedTemplateRtf"/>
        </xsl:variable>
		<svg> ... here is some stuff
	         I actually want to output, because I'm drawing svg.
	         <g><xsl:value-of
select="$resultFromTemplateValue"/></g>
	         <g><xsl:value-of select="$resultFromTemplateRtf"/></g>
	         <g><xsl:call-template name="namedTemplateValue"/></g>
	         <g><xsl:call-template name="namedTemplateRtf"/></g>
	    	 <g>A Result <xsl:value-of
select="msxsl:node-set($resultFromTemplateRtf)/a *
msxsl:node-set($resultFromTemplateRtf)/b"/></g>
	    </svg>
	</xsl:template>
	
	<xsl:template name="namedTemplateValue">
		<xsl:variable name="resultFromTemplate">
		  <!--you would call the template again here-->
              <xsl:value-of select="@a * @b" />
            </xsl:variable> 
         <xsl:if test="$resultFromTemplate != 0"><g>[Result !=
0]</g></xsl:if>
    	   <xsl:value-of select="$resultFromTemplate"/>
	</xsl:template>
	
	<xsl:template name="namedTemplateRtf">
		<xsl:variable name="resultFromTemplate">
              <!--you would call the template again here-->
		  <a><xsl:value-of select="@a" /></a>
              <b><xsl:value-of select="@b" /></b>
            </xsl:variable> 
            <xsl:if test="msxsl:node-set($resultFromTemplate)/a *
msxsl:node-set($resultFromTemplate)/b != 0"><g>[Result !=
0]</g></xsl:if>
    	      <xsl:copy-of select="$resultFromTemplate"/>
	</xsl:template>
</xsl:stylesheet>

Produces

<?xml version="1.0" encoding="UTF-16" ?> 
<svg>
  ... here is some stuff I actually want to output, because I'm drawing
svg. 
  <g>[Result != 0]15</g> 
  <g>[Result != 0]35</g> 
  <g>
      <g>[Result != 0]</g> 
      15 
  </g>
  <g>
      <g>[Result != 0]</g> 
      <a>3</a> 
      <b>5</b> 
  </g>
  <g>A Result 15</g>
</svg>

Ciao Chris

XML/XSL Portal
http://www.bayes.co.uk/xml


> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> David Penton
> Sent: 18 December 2001 05:08
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Tree Fragment - How do I test it AND output it?
> 
> 
> How do I both test the "return" value from a template, and 
> output some of the result nodes?  I have written a recursive 
> template that is intended to "draw" some xml as svg.  The 
> template must do some calculations about the depth of the 
> input xml, and about its "width" (i.e. how many children a 
> particular node has.  My problem is that I do not know how to 
> both get a "return" value from a template that I can test 
> (i.e. treating the named template like a kind of function), 
> and also get output from it:
> 
> Roughly, I want to do this:
> 
> <xsl:template name="namedTemplate">
>     <svg> ... here is some stuff
>          I actually want to output, because I'm drawing svg.
>     </svg>
> 
>    <!--
>         but I need to compute a value via a recursive call
>         to this same template:
>     -->
> 
>         <xsl:variable name="resultFromTemplate">
>             <xsl:call-template name="namedTemplate">
>         </xsl:variable>
> 
>         <!-- and use the "returned" value: -->
> 
>         <xsl:if test="$resultFromTemplate != 0"> ...</xsl:if>
> 
>    <!--
>         Here I'll "return" a value computed in this
>         named template, to control processing in the calling
>         template (i.e. the earlier instance of this same one):
>     -->
> 
>     <xsl:value-of select="$somethingCalculatedHere"/>
> 
> </xsl:template>
> 
> 
> Is there a way to do this?  I suppose, to get at the results, 
> I shall have to convert to a nodelist.  But I don't really 
> see how to both use the tree as a return value, and also to output it.
> 
> Does this make sense?
> 
> - Dave Penton -
> 
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 
> 


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