Security Definition

Tag			Field Name	Req'd	Comments
Component Block <Standard Header>				Y	MsgType = d (lowercase)
320			SecurityReqID	Y
322			SecurityResponseID	Y	Identifier for the Security Definition message
323			SecurityResponseType	Y	Response to the Security Definition Request
Component Block <Instrument>				N	Insert here the set of "Instrument" (symbology) fields defined in "COMMON COMPONENTS OF APPLICATION MESSAGES" of the requested Security
Component Block <Instrument Extension>				N	Insert here the set of "InstrumentExtension" fields defined in "COMMON COMPONENTS OF APPLICATION MESSAGES"
711			NoUnderlyings	N	Number of underlyings
	Component Block <Underlying Instrument>			N	Must be provided if Number of underlyings > 0
15			Currency	N
336			TradingSessionID	N
625			TradingSessionSubID	N
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.
555			NoLegs	N	Number of legs that make up the Security
	Component Block <Instrument Leg>			N	Insert here the set of "InstrumentLeg" (leg-specific symbology) fields defined in "COMMON COMPONENTS OF APPLICATION MESSAGES"
827			ExpirationCycle	N
561			RoundLot	N
562			MinTradeVol	N
Component Block <Standard Trailer>				Y
XML DTD
<!ENTITY % SecDefCustom "" > <!ENTITY % SecDefContent "SecReqID, SecRspID, SecRspTyp, Instrmt?, InstrmtExtension?, UndInstrmtGrp*, Ccy?, TrdgSessID?, TrdgSessSubID?, Text?, EncTextLen?, EncText?, InstrmtLegGrp*, ExpirationCycle?, RndLot?, MinTrdVol? %SecDefCustom;" > <!ELEMENT SecDef (%SecDefContent;)> <!ATTLIST SecDef FIXMsgType_ENUM CDATA #FIXED "d" Category CDATA #FIXED "SecurityAndTradingSessionDefinitionOrStatus" FIXSpecVolume CDATA #FIXED 'Volume3' FullName CDATA #FIXED "SecurityDefinition" ComponentType CDATA #FIXED "Message" >