Tags 8, 9, 35, 49, 56
| Tag | Name | Role |
|---|---|---|
| 8 | BeginString | FIX version (e.g. FIX.4.4) |
| 9 | BodyLength | Length of body |
| 35 | MsgType | Message type |
| 49 | SenderCompID | Your FIX ID |
| 56 | TargetCompID | Counterparty FIX ID |
Every application message inherits these via the standard header.