Type: String
Specifies the service pack release being applied to a message at the session level. Enumerated field with values assigned at time of service pack release. Uses same values as ApplVerID
Added in protocol FIX.4.4 (EP 16)
See in: FIX.5.0, FIX.5.0SP2, FIX.5.0SP2 EP240, FIXT.1.1.