| 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
                                  
                                 
                               | 
                           
                           
                              | 55 | 
                              Symbol | 
                              Y | 
                               | 
                           
                           
                              | 65 | 
                              SymbolSfx | 
                              N | 
                               | 
                           
                           
                              | 48 | 
                              SecurityID | 
                              N | 
                               | 
                           
                           
                              | 22 | 
                              IDSource | 
                              N | 
                               | 
                           
                           
                              | 167 | 
                              SecurityType | 
                              N | 
                              
                                 
                                  Must be specified if a Future or Option. If a Future: Symbol <55>, SecurityType <167>, and MaturityMonthYear <200> are required. If an Option: Symbol <55>, SecurityType <167>, MaturityMonthYear <200>, PutOrCall <201>, and StrikePrice <202> are required.
                                  
                                 
                               | 
                           
                           
                              | 200 | 
                              MaturityMonthYear | 
                              N | 
                              
                                 
                                  Specifies the month and year of maturity. Required if MaturityDay <205> is specified.
                                  
                                 
                               | 
                           
                           
                              | 205 | 
                              MaturityDay | 
                              N | 
                              
                                 
                                  Can be used in conjunction with MaturityMonthYear <200> to specify a particular maturity date.
                                  
                                 
                               | 
                           
                           
                              | 201 | 
                              PutOrCall | 
                              N | 
                              
                                 
                                  For Options. 
                                 
                               | 
                           
                           
                              | 202 | 
                              StrikePrice | 
                              N | 
                              
                                 
                                  For Options. 
                                 
                               | 
                           
                           
                              | 206 | 
                              OptAttribute | 
                              N | 
                              
                                 
                                  For Options. 
                                 
                               | 
                           
                           
                              | 231 | 
                              ContractMultiplier | 
                              N | 
                              
                                 
                                  For Fixed Income, Convertible Bonds, Derivatives, etc. Note: If used, quantities should be expressed in the "nominal" (e.g.
                                    contracts vs. shares) amount.
                                  
                                 
                               | 
                           
                           
                              | 223 | 
                              CouponRate | 
                              N | 
                              
                                 
                                  For Fixed Income. 
                                 
                               | 
                           
                           
                              | 207 | 
                              SecurityExchange | 
                              N | 
                              
                                 
                                  Can be used to identify the security. 
                                 
                               | 
                           
                           
                              | 106 | 
                              Issuer | 
                              N | 
                               | 
                           
                           
                              | 348 | 
                              EncodedIssuerLen | 
                              N | 
                              
                                 
                                  Must be set if EncodedIssuer <349> field is specified and must immediately precede it.
                                  
                                 
                               | 
                           
                           
                              | 349 | 
                              EncodedIssuer | 
                              N | 
                              
                                 
                                  Encoded (non-ASCII characters) representation of the Issuer <106> field in the encoded format specified via the MessageEncoding <347> field.
                                  
                                 
                               | 
                           
                           
                              | 107 | 
                              SecurityDesc | 
                              N | 
                               | 
                           
                           
                              | 350 | 
                              EncodedSecurityDescLen | 
                              N | 
                              
                                 
                                  Must be set if EncodedSecurityDesc <351> field is specified and must immediately precede it.
                                  
                                 
                               | 
                           
                           
                              | 351 | 
                              EncodedSecurityDesc | 
                              N | 
                              
                                 
                                  Encoded (non-ASCII characters) representation of the SecurityDesc <107> field in the encoded format specified via the MessageEncoding <347> field.
                                  
                                 
                               | 
                           
                           
                              | 4 | 
                              AdvSide | 
                              Y | 
                               | 
                           
                           
                              | 53 | 
                              Shares | 
                              Y | 
                               | 
                           
                           
                              | 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 | 
                               | 
                           
                           
                              | <MessageTrailer> | 
                              Y | 
                                 |