protected function _schema($request)
	{
		if (strtolower(substr($request, -2, 2)) != 'rq')
		{
			$request = $request . 'Rq';
		}
		
		$class = 'QuickBooks_QBXML_Schema_Object_' . $request;
		$file = 'QuickBooks/QBXML/Schema/Object/' . $request . '.php';
		
		include_once $file;
		
		if (class_exists($class))
		{
			return new $class();
		}
		
		return false;
	}