Result Tree Fragment is a fundamental concept in XSLT 1.0. Do
read/search on this subject.

As the time does not permit, below is a quick fix to your problem:



Instead of:



   >                 <xsl:with-param name="test" select="$test"/>



use:
                      <xsl:with-param name="test" select="string($test)"/>


--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.


On 5/1/06, Esha Datta <edatta@xxxxxxxx> wrote:

>hi all,
>
>I am trying to write code that will treat a variable as a node.  If
>a variable is empty, I want the stylesheet to think it's
>non-existent rather than existing, but empty. For example, I am
>trying to parse out a string from element, foo. If the value exists,
>I want it to print <test>value of foo</test>.  If it doesn't exist,
>I don't want it to print out anything. Right now, it still prints
>out the tags because the variable exists but is empty at this point.
>Is there any way to check for variable existence like one can with
>nodes?  So if the variable is empty after parsing out the element, I
>want the stylesheet to think that there is no variable. The larger
>issue is that we have templates that process nodes and print output
>if they exist or if the nodes exist, but there is no value.  There
>are some nodes to which we do some processing or parsing where we
>need variables(like with foo in the example below), when we pass
>these variables to templates, I want these templates to treat these
>variables like nodes.  Thanks for your help!
>
>
>stylesheet:
><xsl:stylesheet version="1.0"
>xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>xmlns:fo="http://www.w3.org/1999/XSL/Format">
>
><xsl:template match="/">
><xml>
><xsl:for-each select="//foo">
>         <xsl:variable name="test">
>                 <xsl:if test="contains(.,'em')">
>                 <xsl:value-of select="substring-after(.,'em:
')"/></xsl:if>
>         </xsl:variable>
>         <xsl:call-template name="runTest">
>                 <xsl:with-param name="test" select="$test"/>
>         </xsl:call-template>
></xsl:for-each>
></xml>
></xsl:template>
>
><xsl:template name="runTest">
>         <xsl:param name="test"/>
>
>         <xsl:if test="$test">
>             <test>
>                 <xsl:value-of select="$test"/>
>           </test>
>         </xsl:if>
></xsl:template>
></xsl:stylesheet>
>
>xml file:
><xml>
><foo>bar1</foo>
><foo>bar;em: bar2</foo>
></xml>
>
>This is the result I get:
><xml xmlns:fo="http://www.w3.org/1999/XSL/Format">
>         <test />
>         <test>bar2</test>
></xml>
>
>
>
>Esha Datta





>Los Alamos National Laboratory Research Library