/**
  * Create or replace the data in a graph.
  * @param string $graph : name of the graph
  * @param string $turtle : list of the triples
  * @return boolean : true if it did
  * @access public
  */
 public function set($graph, $turtle)
 {
     $client = new Curl_HTTP_Client();
     $headers = array('Content-Type: application/x-turtle');
     $sUri = $this->_endpoint . $graph;
     $response = $client->send_put_data($sUri, $headers, $turtle);
     $code = $client->get_http_response_code();
     if ($code == 201) {
         return true;
     } else {
         $datastr = print_r($turtle, true);
         $headerstr = print_r($headers, true);
         $this->errorLog("Set:\nHeader :" . $headerstr . "\n Data:" . $datastr, $sUri, $code, $response);
         return false;
     }
 }