| Tag | Field Name | XML Name | Data Type | Union Datatype | Description | Added | Depr. | Enums from tag |
|---|---|---|---|---|---|---|---|---|
| 1063 | UndlyInstrumentPartySubID | @ID | String |
PartySubID value within an underlying instrument party repeating group. Same values as PartySubID (523) | Added FIX.4.4 EP8 |
|