- u -

• UncoveredQty : PosType
• Undefined : ReactorType , SessionStorageType
• UndefinedPriorityAndPolicy : PriorityAndPolicyTraits
• UnderlyingOpposingTrade : ExecuteUnderlyingTrade
• UnexpectedMessageType : SessionErrorReason
• UnexpectedNextSeqNo : SessionWarningReason
• UnexpectedSbeSchemaVersion : SessionWarningReason
• UnexpectedSessionId : SessionWarningReason
• UnexpectedSessionVerId : SessionErrorReason
• UnknownOrInvalid : SecurityTradingStatus
• Unnegotiated : EstablishRejectCode , TerminationCode
• UnrecognizedMessage : TerminationCode
• Unsequenced : FlowType
• Unspecified : EstablishRejectCode , NegotiationRejectCode , TerminationCode
• UnsupportedMessageType : SessionWarningReason