FIX 5.0 : Messages by Category

Session
   Session
      Heartbeat <0>
      TestRequest <1>
      ResendRequest <2>
      Reject <3>
      SequenceReset <4>
      Logout <5>
      Logon <A>
      XML_non_FIX <n>
Pre Trade
   Indication
      IOI <6>
      Advertisement <7>
   EventCommunication
      News <B>
      Email <C>
   QuotationNegotiation
      QuoteRequest <R>
      Quote <S>
      QuoteCancel <Z>
      QuoteStatusRequest <a>
      MassQuoteAcknowledgement <b>
      MassQuote <i>
      QuoteRequestReject <AG>
      RFQRequest <AH>
      QuoteStatusReport <AI>
      QuoteResponse <AJ>
   MarketData
      MarketDataRequest <V>
      MarketDataSnapshotFullRefresh <W>
      MarketDataIncrementalRefresh <X>
      MarketDataRequestReject <Y>
   SecurityAndTradingSessionDefinitionOrStatus
      SecurityDefinitionRequest <c>
      SecurityDefinition <d>
      SecurityStatusRequest <e>
      SecurityStatus <f>
      TradingSessionStatusRequest <g>
      TradingSessionStatus <h>
      SecurityTypeRequest <v>
      SecurityTypes <w>
      SecurityListRequest <x>
      SecurityList <y>
      DerivativeSecurityListRequest <z>
      DerivativeSecurityList <AA>
      SecurityDefinitionUpdateReport <BP>
      SecurityListUpdateReport <BK>
Trade
   SingleGeneralOrderHandling
      ExecutionReport <8>
      OrderCancelReject <9>
      NewOrderSingle <D>
      OrderCancelRequest <F>
      OrderCancelReplaceRequest <G>
      OrderStatusRequest <H>
      DontKnowTradeDK <Q>
      BidResponse <l>
      OrderMassCancelRequest <q>
      OrderMassCancelReport <r>
      OrderMassStatusRequest <AF>
   ProgramTrading
      NewOrderList <E>
      ListCancelRequest <K>
      ListExecute <L>
      ListStatusRequest <M>
      ListStatus <N>
      BidRequest <k>
      ListStrikePrice <m>
   CrossOrders
      NewOrderCross <s>
      CrossOrderCancelReplaceRequest <t>
      CrossOrderCancelRequest <u>
   MultilegOrders
      NewOrderMultileg <AB>
      MultilegOrderCancelReplace <AC>
Post Trade
   Allocation
      AllocationInstruction <J>
      AllocationInstructionAck <P>
      AllocationReport <AS>
      AllocationReportAck <AT>
   SettlementInstruction
      SettlementInstructions <T>
      SettlementInstructionRequest <AV>
   RegistrationInstruction
      RegistrationInstructions <o>
      RegistrationInstructionsResponse <p>
   TradeCapture
      TradeCaptureReportRequest <AD>
      TradeCaptureReport <AE>
      TradeCaptureReportRequestAck <AQ>
      TradeCaptureReportAck <AR>
   Confirmation
      Confirmation <AK>
      Confirmation_Ack <AU>
      ConfirmationRequest <BH>
   PositionMaintenance
      PositionMaintenanceRequest <AL>
      PositionMaintenanceReport <AM>
      RequestForPositions <AN>
      RequestForPositionsAck <AO>
      PositionReport <AP>
      AssignmentReport <AW>
      ContraryIntentionReport <BO>
      AdjustedPositionReport <BL>
   CollateralManagement
      CollateralRequest <AX>
      CollateralAssignment <AY>
      CollateralResponse <AZ>
      CollateralReport <BA>
      CollateralInquiry <BB>
      CollateralInquiryAck <BG>
Other
   Common
      BusinessMessageReject <j>
      NetworkCounterpartySystemStatusRequest <BC>
      NetworkCounterpartySystemStatusResponse <BD>
      UserRequest <BE>
      UserResponse <BF>
Allocation
   Allocation
      AllocationInstructionAlert <BM>
SingleGeneralOrderHandling
   SingleGeneralOrderHandling
      ExecutionAcknowledgement <BN>
SecurityAndTradingSessionDefinitionOrStatus
   SecurityAndTradingSessionDefinitionOrStatus
      TradingSessionList <BJ>
      TradingSessionListRequest <BI>