<xsl:apply-templates select="following-sibling::*[position()= 1]">
<xsl:with-param name="current_indent" select="$current_indent + 4 + string-length()"/>
</xsl:apply-templates>
<xsl:apply-templates select="following-sibling::*[position()= 1]">
<xsl:with-param name="current_indent" select="$current_indent + 4 + string-length()"/>
</xsl:apply-templates>