public function process_category($xml, &$questions) {
        $title = $this->getpath($xml, array('questestinterop', '#', 'assessment', 0, '@', 'title'), '', true);

        $dummyquestion = new stdClass();
        $dummyquestion->qtype = 'category';
        $dummyquestion->category = $this->cleaninput($this->clean_question_name($title));

        $questions[] = $dummyquestion;
    }