Identification of the message.
| Position | Element | Name | Type | Min/Max | Repeat | |
|---|---|---|---|---|---|---|
| C709-10 | 1003 | Message type code | Mandatory | Alphanumeric | 1/6 | 1 |
| C709-20 | 1056 | Version identifier | Opt | Alphanumeric | 1/9 | 1 |
| C709-30 | 1058 | Release identifier | Opt | Alphanumeric | 1/9 | 1 |
| C709-40 | 1476 | Controlling agency identifier | Opt | Alphanumeric | 1/2 | 1 |
| C709-50 | 1523 | Message implementation identification code | Opt | Alphanumeric | 1/6 | 1 |
| C709-60 | 1060 | Revision identifier | Opt | Alphanumeric | 1/6 | 1 |
| C709-70 | 1373 | Document status code | Opt | ID | 1/3 | 1 |
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