Describes the source of the identifier that RelatedOrderID(2887) represents.
| 0 | = | Non-FIX Source | Added EP259
| | [NonFIXSource] |
| 1 | = | Order identifier Can be used to refer to an order identifier assigned by the party accepting the order, e.g. OrderID(37). | Added EP259
| | [SystemOrderIdentifier] |
| 2 | = | Client order identifier Can be used to refer to an order identifier assigned by the party initiating the order, e.g. ClOrdID(11). | Added EP259
| | [ClientOrderIdentifier] |
| 3 | = | Secondary order identifier Can be used to refer to an additional order identifier assigned by the party accepting the order, e.g. SecondaryOrderID(198). | Added EP259
| | [SecondaryOrderIdentifier] |
| 4 | = | Secondary client order identifier Can be used to refer to an additional order identifier assigned by the party initiating the order, e.g. SecondaryClOrdID(526). | Added EP259
| | [SecondaryClientOrderIdentifier] |