">       <xsl:choose>         <xsl:when test="string-length($tmpstring) > 0">           <xsl:call-template name="remove-paren">             <xsl:with-param name="string" select="$tmpstring"/>           </xsl:call-template>         </xsl:when>         <xsl:otherwise>           <xsl:call-template name="remove-paren">             <xsl:with-param name="string" select="substring-after(., '(')"/>           