Translate pure XSL to RTF-XSL

Hello,

if I load this example as XSL into BI Publisher it works fine:

<?xml version="1.0" encoding="utf-8"?>

<xsl:stylesheet version="1.0"

xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

xmlns:ext="http://exslt.org/common">

<xsl:output method="text"/>

<xsl:variable name="vA" select="3"/>

<xsl:variable name="vB" select="1"/>

<xsl:variable name="vC" select="9"/>

<xsl:variable name="vD" select="5"/>

<xsl:template match="/">

     <xsl:variable name="vrtfStore">

       <num><xsl:value-of select="$vA"/></num>

<num><xsl:value-of select="$vB"/></num>

<num><xsl:value-of select="$vC"/></num>

<num><xsl:value-of select="$vD"/></num>

     </xsl:variable>

     <xsl:for-each select="ext:node-set($vrtfStore)/*">

      <xsl:sort data-type="number" order="ascending"/>