990001 - Header
| Art | DDI | Name | Typ | Länge | Dez | Codeset |
| K | 000000 | DD-Typ | A | 8 | | |
| K | 900002 | DD-Version ISO | N | 8 | | |
| K | 900003 | File Date | N | 8 | | |
| K | 900004 | File Time | N | 6 | | |
| M | 900006 | Sender Software | A | 24 | | 999 |
| M | 900008 | Sender Software Version | A | 8 | | 999 |
| M | 900009 | DD-Version national | A | 8 | | |
| M | 900012 | DD-Version manufacturer | A | 8 | | |
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