function _handle_keywords(&$data) {
        global $ID;

        // Fetch tags for the page; stop proceeding when no tags specified
        $tags = p_get_metadata($ID, 'subject', METADATA_DONT_RENDER);
        if(is_null($tags)) return;
       
        // Replace underscores with blanks
        foreach($data->data['meta'] as &$meta) {
            if($meta['name'] == 'keywords') {
                $meta['content'] = str_replace('_', ' ', $meta['content']);
               
                // add extra styling
                $t = explode(',', $meta['content']);
                if(in_array('deprecated', $t)) {
                    $data->data['style'][] = array('type'  => 'text/css',
                                                     '_data' => '.dokuwiki .page {background-color: red;}');
                }
            }
        }       
}