| Tag | 
                              Field Name | 
                              Req'd | 
                              Comments | 
                           
                           
                              | <MessageHeader> | 
                              Y | 
                              MsgType <35> = 7
                               | 
                           
                           
                              | 2 | 
                              AdvId | 
                              Y | 
                               | 
                           
                           
                              | 5 | 
                              AdvTransType | 
                              Y | 
                               | 
                           
                           
                              | 3 | 
                              AdvRefID | 
                              N | 
                              
                                 
                                  Required for Cancel and Replace AdvTransType <5> messages
                                  
                                 
                               | 
                           
                           
                              | 
                                    Component Block - <Instrument> | 
                              Y | 
                                                          
                               | 
                           
                           
                              | 555 | 
                              NoLegs | 
                              N | 
                              
                                 
                                  Number of legs 
                                 
                                 Identifies a Multi-leg Execution if present and non-zero. 
                                 
                               | 
                           
                           
                              | => | 
                              
                                    Component Block - <InstrumentLeg> | 
                              N | 
                              
                                 
                                  Must be provided if Number of legs > 0 
                                 
                               | 
                           
                           
                              | 711 | 
                              NoUnderlyings | 
                              N | 
                              
                                 
                                  Number of underlyings 
                                 
                               | 
                           
                           
                              | => | 
                              
                                    Component Block - <UnderlyingInstrument> | 
                              N | 
                              
                                 
                                  Must be provided if Number of underlyings > 0 
                                 
                               | 
                           
                           
                              | 4 | 
                              AdvSide | 
                              Y | 
                               | 
                           
                           
                              | 53 | 
                              Quantity | 
                              Y | 
                               | 
                           
                           
                              | 854 | 
                              QtyType | 
                              N | 
                               | 
                           
                           
                              | 44 | 
                              Price | 
                              N | 
                               | 
                           
                           
                              | 15 | 
                              Currency | 
                              N | 
                               | 
                           
                           
                              | 75 | 
                              TradeDate | 
                              N | 
                               | 
                           
                           
                              | 60 | 
                              TransactTime | 
                              N | 
                               | 
                           
                           
                              | 58 | 
                              Text | 
                              N | 
                               | 
                           
                           
                              | 354 | 
                              EncodedTextLen | 
                              N | 
                              
                                 
                                  Must be set if EncodedText <355> field is specified and must immediately precede it.
                                  
                                 
                               | 
                           
                           
                              | 355 | 
                              EncodedText | 
                              N | 
                              
                                 
                                  Encoded (non-ASCII characters) representation of the Text <58> field in the encoded format specified via the MessageEncoding <347> field.
                                  
                                 
                               | 
                           
                           
                              | 149 | 
                              URLLink | 
                              N | 
                              
                                 
                                  A URL (Uniform Resource Locator) link to additional information (i.e. https://en.wikipedia.org/wiki/URL) 
                                 
                               | 
                           
                           
                              | 30 | 
                              LastMkt | 
                              N | 
                               | 
                           
                           
                              | 336 | 
                              TradingSessionID | 
                              N | 
                               | 
                           
                           
                              | 625 | 
                              TradingSessionSubID | 
                              N | 
                               | 
                           
                           
                              | <MessageTrailer> | 
                              Y | 
                                 |