PTP_CHDK_TYPE_STRING  871 core/ptp.c           msg = ptp_script_create_msg(PTP_CHDK_S_MSGTYPE_USER,PTP_CHDK_TYPE_STRING,msg_size,NULL);
PTP_CHDK_TYPE_STRING  124 modules/luascript.c             datatype = PTP_CHDK_TYPE_STRING;