Tag Field Name Data Type Description Used in
23 IOIID

AbbrName: IOIID
String Unique identifier of IOI message.
(Prior to FIX 4.1 this field was of type int)
NewOrderSingle
ListOrdGrp
NewOrderCross
CrossOrderCancelReplaceRequest
NewOrderMultileg
MultilegOrderCancelReplace
QuoteResponse
IOI ( with FIXML abbr of ID )