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

Subject: Re: [xsl] treating variables like nodes - testing for existence
From: "Dimitre Novatchev" <dnovatchev@xxxxxxxxx>
Date: Mon, 1 May 2006 15:48:05 -0700
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"/>

                      <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=""; >xmlns:fo="";> > ><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:variable>
>         <xsl:call-template name="runTest">
>                 <xsl:with-param name="test" select="$test"/>
>         </xsl:call-template>
><xsl:template name="runTest">
>         <xsl:param name="test"/>
>         <xsl:if test="$test">
>             <test>
>                 <xsl:value-of select="$test"/>
>           </test>
>         </xsl:if>
>xml file:
><foo>bar;em: bar2</foo>
>This is the result I get:
><xml xmlns:fo="";>
>         <test />
>         <test>bar2</test>
>Esha Datta

>Los Alamos National Laboratory Research Library

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