public static function checkInstallData(array $installData){
		// instance name
		if (empty($installData['instance_name'])){
			$msg = "Missing install parameter 'instance_name'.";
			throw new tao_install_utils_MalformedParameterException($msg);
		}
		else if (!is_string($installData['instance_name'])){
			$msg = "Malformed install parameter 'instance_name'. It must be a string.";
			throw new tao_install_utils_MalformedParameterException($msg);
		}
		else if (1 === preg_match('/\s/u', $installData['instance_name'])){
			$msg = "Malformed install parameter 'instance_name'. It cannot contain spacing characters (tab, backspace).";
			throw new tao_install_utils_MalformedParameterException($msg);
		}
	}