The Security Definition Request <c> message is used for the following:
Subscription for security status can be optionally specified by including the SubscriptionRequestType <263> field on the message.
See "Security Definition <d>, Security Status <f>, and Trading Session Message Scenarios"
Insert here the set of "<Instrument>" (symbology) fields defined in "COMMON COMPONENTS OF APPLICATION MESSAGES"
of the requested Security
Comment, instructions, or other identifying information.
Must be set if EncodedText <355> field is specified and must immediately precede it.
Encoded (non-ASCII characters) representation of the Text <58> field in the encoded format specified via the MessageEncoding <347> field.
Optional Trading Session Identifier to specify a particular trading session for which you want to obtain a list of securities
that are tradeable.
Number of legs that make up the Security
Insert here the set of "<InstrumentLeg>" (leg-specific symbology) fields defined in "COMMON COMPONENTS OF APPLICATION MESSAGES"
Required if NoLegs <555> > 0.
Subscribe or unsubscribe for security status to security specified in request.