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TABLE A
Data Type Designator T1 Matrix Table
for
T2A1A2ii definitions
| T1 | Data type | T2 | A1 | A2 | ii | Priority | Max Length |
| A | Analyses | B1 | C1 | C1 | ** | 3 | 15,000 |
| B | Service message | *** | *** | *** | *** | 1/2/4* | 15,000 |
| C | Climatic data | B1 | C1 | C1 | ** | 4 | 15,000 |
| D | Grid point information (GRID) | B2 | C3 | C4 | D2 | 3 | 15,000 |
| E | Satellite imagery | B5 | C1 | C1 | ** | 3 | (1) |
| F | Forecast | B1 | C1 | C1 | ** | 3 | 15,000 |
| G | Grid point information (GRID) | B2 | C3 | C4 | D2 | 3 | 15,000 |
| H | Grid point information (GRIB) | B2 | C3 | C4 | D2 | 3 | 15,000 |
| I | Binary observation - BUFR | B3 | C6 | C3 | ** | 3 | 15,000 |
| J | forecast Information - BUFR | B3 | C6 | C4 | D2 | 3 | 15,000 |
| K | CREX | C7 | C7 | C3 | ** | 2 | 15,000 |
| L | -- | | | | | | |
| M | -- | | | | | | |
| N | Notices | B1 | C1 | C1 | ** | 4 | 15,000 |
| O | Oceanographic (GRIB) | B4 | C3 | C4 | D1 | 3 | 15,000 |
| P | Pictorial information(binary) | B6 | C3 | C4 | D2 | 3 | 15,000 |
| Q | Pictorial information regional | B6 | C3 | C5 | D2 | 3 | (1) |
| R | -- | | | | | | |
| S | Surface data | B1 | C1/C2 | C1/C2 | ** | 2/4* | 15,000 |
| T | Satellite data | B1 | C3 | C4 | ** | 2 | 15,000 |
| U | Upper-air data | B1 | C1/C2 | C1/C2 | ** | 2 | 15,000 |
| V | National data | (3) | C1 | C1 | ** | (2) | (1) |
| W | Warnings | B1 | C1 | C1 | ** | 1 | 15,000 |
| X | GRID regional use | B2 | C3 | (2) | D2 | 3 | 15,000 |
| Y | GRIB regional use | B2 | C3 | (3) | D2 | 3 | 15,000 |
| Z | GRIB National use | (3) | (3) | (3) | (3) | 3 | 15,000 |
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* Priority level:
- 1 is allocated to service messages
- 2 is allocated to data and request messages
- 4 is allocated to seismologic data (T1T2 = SE) or administrative messages
** See Para.2.3.2.2 for definition and use
*** See Para.2.4.2.3 for definition and use
(1) Max size to 250K
(2) To be determined later date
(3) Table B2 or national table
DATA TYPES Y and Z uses National tables in some countries
U.S. National Practice Tables
H uses C8 instead of C3
Y & Z uses B7 instead of B2
Y & Z uses C8 instead of C3
Y & Z uses C9 for the T2 A1
fields to define a TILE number when the heading uses KWBZ
Y & Z uses C10 for forecast hours
Y & Z uses D3 instead of D2
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