XML : Using FOP to export PDF Document.

The XSLT code written below which checks for sublists and converting to PDF is not working properly. We use F.O.P to export PDF.

  `<xsl:template match="ol|OL">  <!--    <fo:list-block provisional-distance-between-starts="1cm"        provisional-label-separation="0.5cm">        <xsl:attribute name="space-after">          <xsl:choose>            <xsl:when test="ancestor::ul or ancestor::ol">              <xsl:text>0pt</xsl:text>            </xsl:when>            <xsl:otherwise>              <xsl:text>12pt</xsl:text>            </xsl:otherwise>          </xsl:choose>        </xsl:attribute>        <xsl:attribute name="start-indent">          <xsl:variable name="ancestors">            <xsl:choose>              <xsl:when test="count(ancestor::ol) or count(ancestor::ul)">                <xsl:value-of select="1 +                                       (count(ancestor::ol) +                                        count(ancestor::ul)) *                                       1.25"/>              </xsl:when>              <xsl:otherwise>                <xsl:text>1</xsl:text>              </xsl:otherwise>            </xsl:choose>          </xsl:variable>          <xsl:value-of select="concat($ancestors, 'cm')"/>        </xsl:attribute>        <xsl:apply-templates select="*"/>      </fo:list-block>-->    </xsl:template>`    

Thank you.