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                Structure |
            Related Messages 
                  Description
               
               The Security Type Request message is used to return a list of security types available from a counterparty or market,   
               The request can include a specific TradingSessionID <336> for which Security Types should be returned.
                     
               Security Type Request 
                  Structure
                  
                     
                        
                           
                              | Tag | 
                              Field Name | 
                              Req'd | 
                              Comments | 
                            
                           
                              | <MessageHeader> | 
                              Y | 
                              MsgType <35> = v
                               | 
                            
                           
                              | 320 | 
                              SecurityReqID | 
                              Y | 
                               | 
                            
                           
                              | 58 | 
                              Text | 
                              N | 
                              Comment, instructions, or other identifying information. | 
                            
                           
                              | 354 | 
                              EncodedTextLen | 
                              N | 
                              Must be set if EncodedText field is specified and must immediately precede it. | 
                            
                           
                              | 355 | 
                              EncodedText | 
                              N | 
                              Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field. | 
                            
                           
                              | 336 | 
                              TradingSessionID | 
                              N | 
                              Optional Trading Session Identifier to specify a particular trading session for which you want to obtain a list of securities
                                 that are tradeable.
                               | 
                            
                           
                              | 625 | 
                              TradingSessionSubID | 
                              N | 
                               | 
                            
                           
                              | 460 | 
                              Product | 
                              N | 
                              Used to qualify which security types are returned | 
                            
                           
                              | 167 | 
                              SecurityType | 
                              N | 
                              Used to qualify which security type is returned | 
                            
                           
                              | 762 | 
                              SecuritySubType | 
                              N | 
                              Used to qualify which security types are returned | 
                            
                           
                              | <MessageTrailer> | 
                              Y | 
                                 | 
                            
                         
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