Re: Help! Using variables in for-each

[David_N_Bertoni]

Hi Scott,

The best forum for a question like this is the Mulberry XSL list, since
it's not Xalan-specific.  You should consider subscribing to that list and
posting general XSL questions there:

   http://www.mulberrytech.com/xsl/xsl-list/index.html

This question is answered in the XSL List FAQ.

In standard XSLT 1.0, there is no way to dynamically evaluate an XPath
expression.  You can use the Xalan extension function evaluate() to do
this, but it makes your stylesheet non-standard.

Also, if $root is truly a result tree fragment, you need to use the nodeset
() extension function to convert it to a node set in the select attribute
of the xsl:for-each.

Dave



                                                                                
              
                    Scott Moore                                                 
              
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                    11/02/2001 12:35         Subject:     Help!  Using 
variables in for-each  
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I'm trying to write a template in xalan that takes a result tree fragment
($root) along with the names of child elements ($col1-select and
$col2-select).  This template would then dynamically create a XSL-FO table
based on the variables passed in.  The template looks something like this:

  <xsl:template name="table-body">
    <xsl:param name="root"/>
    <xsl:param name="col1-select"/>
    <xsl:param name="col2-select"/>

    <fo:table-body>
      <xsl:for-each select="$root">
        <fo:table-row>
          <fo:table-cell>
            <fo:block><xsl:value-of select="$col1-select"/></fo:block>
          </fo:table-cell>
          <xsl:if test="string-length($col2-select) > 0">
            <fo:table-cell>
              <fo:block><xsl:value-of select="$col2-select"/></fo:block>
            </fo:table-cell>
          </xsl:if>
        </fo:table-row>
      </xsl:for-each>
    </fo:table-body>
  </xsl:template>

<xsl:call-template name="table-body">
  <xsl:with-param name="root" select="/Session/Values"></xsl:with-param>
  <xsl:with-param name="col1-select">node1</xsl:with-param>
  <xsl:with-param name="col2-select">node2</xsl:with-param>
</xsl:call-template>


It doesn't work.  Instead of treating $col1-select as a XPath expression,
it
just adds the literal string.  I've tried lots of different expressions

"{$col1-select}"
"./$col1-select"
"self:node()/[name()=$col1-select]"
blah blah

Is this possible?  I think it's probably something simple, but I just can't
figure it out.

Thanks for any help,
Scott