public static function build($data = [])
	{
		$text = '<?xml version="1.0" encoding="UTF-8" ?>'.PHP_EOL;
		foreach ($data as $tg => $ct) {
			if (is_array($ct) && isset($ct['content']) && isset($ct['attribute']))
				$text .= self::generateTag($tg, $ct['content'], $ct['attribute']);
			else
				$text .= self::generateTag($tg, $ct);
		}
		return $text;
	}