| Tag | Field Name | XML Name | Data Type | Union Datatype | Description | Added | Depr. | Enums from tag | Valid values |
|---|---|---|---|---|---|---|---|---|---|
| 26 | IOIRefID | @RefID | String |
Reference identifier used with CANCEL and REPLACE, transaction types. (Prior to FIX 4.1 this field was of type int) | FIX.2.7 |
|