| Tag | 
                              Field Name | 
                              Req'd | 
                              Comments | 
                           
                           
                              | <MessageHeader> | 
                              Y | 
                              MsgType <35> = d
                               | 
                           
                           
                              | 320 | 
                              SecurityReqID | 
                              Y | 
                               | 
                           
                           
                              | 322 | 
                              SecurityResponseID | 
                              Y | 
                              
                                 
                                  Identifier for the Security Definition <d> message
                                  
                                 
                               | 
                           
                           
                              | 323 | 
                              SecurityResponseType | 
                              N | 
                               | 
                           
                           
                              | 393 | 
                              TotalNumSecurities | 
                              Y | 
                               | 
                           
                           
                              | 55 | 
                              Symbol | 
                              N | 
                              
                                 
                                  Symbol of the requested Security 
                                 
                               | 
                           
                           
                              | 65 | 
                              SymbolSfx | 
                              N | 
                              
                                 
                                  Suffix of the Requested Security 
                                 
                               | 
                           
                           
                              | 48 | 
                              SecurityID | 
                              N | 
                              
                                 
                                  Security ID of the requested Security 
                                 
                               | 
                           
                           
                              | 22 | 
                              IDSource | 
                              N | 
                              
                                 
                                  Source of the Security ID 
                                 
                               | 
                           
                           
                              | 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.
                                  
                                 
                                 Set to '?' if Security Definition Request <c> is looking for the Security Types
                                  
                                 
                               | 
                           
                           
                              | 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 | 
                               | 
                           
                           
                              | 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.
                                  
                                 
                               | 
                           
                           
                              | 15 | 
                              Currency | 
                              N | 
                               | 
                           
                           
                              | 336 | 
                              TradingSessionID | 
                              N | 
                               | 
                           
                           
                              | 58 | 
                              Text | 
                              N | 
                              
                                 
                                  Comment, instructions, or other identifying information. 
                                 
                               | 
                           
                           
                              | 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.
                                  
                                 
                               | 
                           
                           
                              | 146 | 
                              NoRelatedSym | 
                              N | 
                              
                                 
                                  Number of legs that make up the Security 
                                 
                               | 
                           
                           
                              | => | 
                              311 | 
                              UnderlyingSymbol | 
                              N | 
                              
                                 
                                  Must be specified as the first field in the repeating group. Required if NoRelatedSym <146> > 0.
                                  
                                 
                               | 
                           
                           
                              | => | 
                              312 | 
                              UnderlyingSymbolSfx | 
                              N | 
                               | 
                           
                           
                              | => | 
                              309 | 
                              UnderlyingSecurityID | 
                              N | 
                               | 
                           
                           
                              | => | 
                              305 | 
                              UnderlyingIDSource | 
                              N | 
                               | 
                           
                           
                              | => | 
                              310 | 
                              UnderlyingSecurityType | 
                              N | 
                              
                                 
                                  Must be specified if a Future or Option. If a Future: UnderlyingSymbol <311>, UnderlyingSecurityType <310>, and UnderlyingMaturityMonthYear <313> are required. If an Option: UnderlyingSymbol <311>, UnderlyingSecurityType <310>, UnderlyingMaturityMonthYear <313>, PutOrCall <201>, and UnderlyingStrikePrice <316> are required.
                                  
                                 
                               | 
                           
                           
                              | => | 
                              313 | 
                              UnderlyingMaturityMonthYear | 
                              N | 
                              
                                 
                                  Specifies the month and year of maturity. Required if UnderlyingMaturityDay <314> is specified.
                                  
                                 
                               | 
                           
                           
                              | => | 
                              314 | 
                              UnderlyingMaturityDay | 
                              N | 
                              
                                 
                                  Can be used in conjunction with UnderlyingMaturityMonthYear <313> to specify a particular maturity date.
                                  
                                 
                               | 
                           
                           
                              | => | 
                              315 | 
                              UnderlyingPutOrCall | 
                              N | 
                              
                                 
                                  For Options. 
                                 
                               | 
                           
                           
                              | => | 
                              316 | 
                              UnderlyingStrikePrice | 
                              N | 
                              
                                 
                                  For Options. 
                                 
                               | 
                           
                           
                              | => | 
                              317 | 
                              UnderlyingOptAttribute | 
                              N | 
                              
                                 
                                  For Options. 
                                 
                               | 
                           
                           
                              | => | 
                              436 | 
                              UnderlyingContractMultiplier | 
                              N | 
                              
                                 
                                  For Fixed Income, Convertible Bonds, Derivatives, etc. 
                                 
                               | 
                           
                           
                              | => | 
                              435 | 
                              UnderlyingCouponRate | 
                              N | 
                              
                                 
                                  For Fixed Income. 
                                 
                               | 
                           
                           
                              | => | 
                              308 | 
                              UnderlyingSecurityExchange | 
                              N | 
                              
                                 
                                  Can be used to identify the security. 
                                 
                               | 
                           
                           
                              | => | 
                              306 | 
                              UnderlyingIssuer | 
                              N | 
                               | 
                           
                           
                              | => | 
                              362 | 
                              EncodedUnderlyingIssuerLen | 
                              N | 
                              
                                 
                                  Must be set if EncodedUnderlyingIssuer <363> field is specified and must immediately precede it.
                                  
                                 
                               | 
                           
                           
                              | => | 
                              363 | 
                              EncodedUnderlyingIssuer | 
                              N | 
                              
                                 
                                  Encoded (non-ASCII characters) representation of the UnderlyingIssuer <306> field in the encoded format specified via the MessageEncoding <347> field.
                                  
                                 
                               | 
                           
                           
                              | => | 
                              307 | 
                              UnderlyingSecurityDesc | 
                              N | 
                               | 
                           
                           
                              | => | 
                              364 | 
                              EncodedUnderlyingSecurityDescLen | 
                              N | 
                              
                                 
                                  Must be set if EncodedUnderlyingSecurityDesc <365> field is specified and must immediately precede it.
                                  
                                 
                               | 
                           
                           
                              | => | 
                              365 | 
                              EncodedUnderlyingSecurityDesc | 
                              N | 
                              
                                 
                                  Encoded (non-ASCII characters) representation of the UnderlyingSecurityDesc <307> field in the encoded format specified via the MessageEncoding <347> field.
                                  
                                 
                               | 
                           
                           
                              | => | 
                              319 | 
                              RatioQty | 
                              N | 
                              
                                 
                                  Quantity of particular leg in the Security 
                                 
                               | 
                           
                           
                              | => | 
                              54 | 
                              Side | 
                              N | 
                              
                                 
                                  Indicates if this leg of the security is to be Bought or Sold as part of this complex security. 
                                 
                               | 
                           
                           
                              | => | 
                              318 | 
                              Underlying Currency | 
                              N | 
                               | 
                           
                           
                              | <MessageTrailer> | 
                              Y | 
                                 |