Re: [xsl] combining two variables to generate XPATH

[Jeff Kenton <jkenton@xxxxxxxxxxxxx>]

bix xslt wrote:
> Is that FAQ outdated??  I know that the following code works just fine:
>
> <xsl:template match="proc">
>  <xsl:call-template name="foo">
>    <xsl:with-param name="node" select="." />
>  </xsl:call-template>
> </xsl:template>
>
> <xsl:template name="foo">
>  <xsl:param name="node"/>
>  <xsl:for-each select="$node/branch/leaf">
>    <xsl:value-of select="@id" />
>  </xsl:for-each>
> </xsl:template>

This is legal, as long as $node represents a nodeset (which it does here).

> What is different about a path with a single variable, and a path with 
> two variables?  Why can't I specify a second variable:
>
> <xsl:template name="foo">
>  <xsl:param name="node"/>
>  <xsl:param name="branch" select="'someBranch'"/>
>  <xsl:for-each select="$node/$branch/leaf">
>    <xsl:value-of select="@id" />
>  </xsl:for-each>
> </xsl:template>

This is not legal. The only place a variable reference can appear in a Path 
Expression is at the beginning.  $node is OK here, but $branch is not.

Various previous messages suggest using evaluate() or name tests to solve your 
problem.  They should work.



--
--------------------------
Jeff Kenton
DataPower Technology, Inc.



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