IOIID (Tag = 23, Type: String)

Unique identifier of IOI message.

(Prior to FIX 4.1 this field was of type int)

Used in:

• Indication of Interest (6)
• New Order - Multileg (AB)
• Multileg Order Cancel Replace Request (AC)
• Quote Response (AJ)
• New Order - Single (D)
• New Order - List (E)
• New Order - Cross (s)
• Cross Order Cancel/Replace Request (t)