protected function __getMetaString()
    {
        $strOutput = "";

        foreach ($this->__meta as $key => $value) {
            if (! in_array($key, array_merge($this->__reservedmeta, $this->__fieldmeta))) {
                $strOutput .= " {$key}=\"{$value}\"";
            }
        }

        return $strOutput;
    }