Security Definition Request (MsgType = c, FIXML = SecDefReq)

The Security Definition Request (c) message is used for the following:

Request a specific Security to be traded with the second party. The request security can be defined as a multileg security made up of one or more instrument legs.

Subscription for security status can be optionally specified by including the SubscriptionRequestType (263) field on the message.

See "Security Definition, Security Status, and Trading Session Message Scenarios"

Tag		Field Name	FIXML	Req'd	Comments
<Standard Message Header>				Y	MsgType = c
320		SecurityReqID	@ReqID	Y
321		SecurityRequestType	@ReqTyp	Y
<Instrument>				N	Instrument of the requested Security
<Instrument Extension>				N
711		NoUnderlyings	Undly	N	Number of underlyings
=>	<Underlying Instrument>			C	Must be provided if Number of underlyings > 0
15		Currency	@Ccy	N
58		Text	@Txt	N	Comment, instructions, or other identifying information.
354		EncodedTextLen	@EncTxtLen	C	Must be set if EncodedText (355) field is specified and must immediately precede it.
355		EncodedText	@EncTxt	C	Encoded (non-ASCII characters) representation of the Text (58) field in the encoded format specified via the MessageEncoding (347) field.
336		TradingSessionID	@SesID	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	@SesSub	N
555		NoLegs	Leg	N	Number of legs that make up the Security
=>	<Instrument Leg>			C	Required if NoLegs (555) > 0.
827		ExpirationCycle	@ExpirationCycle	N
263		SubscriptionRequestType	@SubReqTyp	N	Subscribe or unsubscribe for security status to security specified in request.
<Standard Message Trailer>				Y