Notation	Name	Description	Status
1	WMO block number		stable
2	WMO station number		stable
3	WMO Region number/geographical area		stable
4	WMO Region sub-area		stable
5	Buoy/platform identifier		stable
6	Aircraft flight number		stable
7	Satellite identifier		stable
8	Aircraft registration number or other identification		stable
9	Type of commercial aircraft		stable
10	Stationary buoy platform identifier; e.g. C-MAN buoys		stable
11	Ship or mobile land station identifier		stable
12	Direction of motion of moving observing platform		stable
13	Speed of motion of moving observing platform		stable
14	Platform drift speed (high precision)		stable
15	Station or site name		stable
18	Short station or site name		stable
19	Long station or site name		stable
20	WMO Region sub-area		stable
21	Synoptic feature identifier		stable
22	Name of feature		stable
23	Observation sequence number		stable
24	Wind speed source		stable
25	Storm identifier		stable
26	WMO storm name		stable
27	WMO long storm name		stable
28	Aerosol optical depth (AOD) source		stable
29	SSI source		stable
30	Numerical model identifier		stable
31	Identification of originating/generating centre		stable
32	Generating application		stable
33	Identification of originating/generating centre		stable
34	Identification of originating/generating sub-centre		stable
35	Originating centre		stable
36	Agency in charge of operating the observing platform		stable
37	SIGMET sequence identifier		stable
38	Source of sea ice fraction		stable
39	Graphical Area Forecast (GFA) sequence identifier		stable
40	Processing centre ID code		stable
41	Absolute platform velocity - first component		stable
42	Absolute platform velocity - second component		stable
43	Absolute platform velocity - third component		stable
50	Platform transmitter ID number		stable
51	Platform transmitter ID number		stable
52	Platform transmitter ID		stable
53	Tsunameter report sequence number triggered by a tsunami event		stable
60	Aircraft reporting point (Beacon identifier)		stable
62	Short ICAO location indicator		stable
63	ICAO location indicator		stable
64	Runway designator		stable
65	ICAO region identifier		stable
75	Tide station identification		stable
79	Unique identifier for the profile		stable
80	Ship line number according to SOOP		stable
81	Radiosonde serial number		stable
82	Radiosonde ascension number		stable
83	Radiosonde release number		stable
85	Observing platform manufacturer's model		stable
86	Observing platform manufacturer's serial number		stable
87	WMO marine observing platform extended identifier		stable
90	Technique for making up initial perturbations		stable
91	Ensemble member number		stable
92	Type of ensemble forecast		stable
93	Balloon lot number		stable
94	WBAN number		stable
95	Observer identification		stable
96	Station acquisition		stable
99	Unique product definition		stable
101	State identifier		stable
102	National station number		stable
103	IMO Number. Unique Lloyd's register		stable
110	Aircraft tail number		stable
111	Origination airport		stable
112	Destination airport		stable
113	Template version number defined by originating centre		stable
115	Identifier of the cruise or mission under which the data were collected		stable
124	Grid point identifier		stable
144	Snapshot identifier		stable