public function validateFragment($html)
    {
        $query = http_build_query(array_merge(
            $this->getOptions()->buildOptions(),
            array('fragment' => $html)
        ));

        $context = stream_context_create(array(
            'http' => array(
                'method' => 'POST',
                'header' => "Content-Type: application/x-www-form-urlencoded\r\nUser-Agent: HTMLValidator",
                'content' => $query,
            )
        ));

        $data = $this->sendRequest($this->validatorUri, $context);

        return $this->parseSOAP12Response($data);
    }