DocumentBase::outputXmlUnits

protected function outputXmlUnits($level, $name, $list)
{
	$result = '';
	$result .= $this->openNodeDirectory($level+0, $name);
	foreach ($list as $k=>$v)
		$result .= $this->formatXMLNode($level+1, $k, $v);
	$result .= $this->closeNodeDirectory($level+0, $name);

	return $result;
}