Re: [xsl] treating variables like nodes - testing for existence

["Dimitre Novatchev" <dnovatchev@xxxxxxxxx>]

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