Components — FIX.4.2

Tag	Name	Type	Req	Description	Added
8	BeginString	String	Y	FIX.4.2 (Always unencrypted, must be first field in message)	FIX.4.0
9	BodyLength	int	Y	(Always unencrypted, must be second field in message)	FIX.4.0
35	MsgType	String	Y	(Always unencrypted, must be third field in message) ▶ 46 enum values →	FIX.4.0
49	SenderCompID	String	Y	(Always unencrypted)	FIX.4.0
56	TargetCompID	String	Y	(Always unencrypted)	FIX.4.0
115	OnBehalfOfCompID	String	N	Trading partner company ID used when sending messages via a third party (Can be embedded within encrypted data section.)	FIX.4.0
128	DeliverToCompID	String	N	Trading partner company ID used when sending messages via a third party (Can be embedded within encrypted data section.)	FIX.4.0
90	SecureDataLen	Length	N	Required to identify length of encrypted section of message. (Always unencrypted)	FIX.4.0
91	SecureData	data	N	Required when message body is encrypted. Always immediately follows SecureDataLen field.	FIX.4.0
34	MsgSeqNum	int	Y	(Can be embedded within encrypted data section.)	FIX.4.0
50	SenderSubID	String	N	(Can be embedded within encrypted data section.)	FIX.4.0
142	SenderLocationID	String	N	Sender's LocationID (i.e. geographic location and/or desk) (Can be embedded within encrypted data section.)	FIX.4.1
57	TargetSubID	String	N	"ADMIN" reserved for administrative messages not intended for a specific user. (Can be embedded within encrypted data section.)	FIX.4.0
143	TargetLocationID	String	N	Trading partner LocationID (i.e. geographic location and/or desk) (Can be embedded within encrypted data section.)	FIX.4.1
116	OnBehalfOfSubID	String	N	Trading partner SubID used when delivering messages via a third party. (Can be embedded within encrypted data section.)	FIX.4.0
144	OnBehalfOfLocationID	String	N	Trading partner LocationID (i.e. geographic location and/or desk) used when delivering messages via a third party. (Can be embedded within encrypted data section.)	FIX.4.1
129	DeliverToSubID	String	N	Trading partner SubID used when delivering messages via a third party. (Can be embedded within encrypted data section.)	FIX.4.0
145	DeliverToLocationID	String	N	Trading partner LocationID (i.e. geographic location and/or desk) used when delivering messages via a third party. (Can be embedded within encrypted data section.)	FIX.4.1
43	PossDupFlag	Boolean	N	Always required for retransmitted messages, whether prompted by the sending system or as the result of a resend request. (Can be embedded within encrypted data section.) ▶ 2 enum values →	FIX.4.0
97	PossResend	Boolean	N	Required when message may be duplicate of another message sent under a different sequence number. (Can be embedded within encrypted data section.) ▶ 2 enum values →	FIX.4.0
52	SendingTime	UTCTimestamp	Y	(Can be embedded within encrypted data section.)	FIX.4.0
122	OrigSendingTime	UTCTimestamp	N	Required for message resent as a result of a ResendRequest. If data is not available set to same value as SendingTime (Can be embedded within encrypted data section.)	FIX.4.0
212	XmlDataLen	Length	N	Required when specifying XmlData to identify the length of a XmlData message block. (Can be embedded within encrypted data section.)	FIX.4.2
213	XmlData	data	N	Can contain a XML formatted message block (e.g. FIXML). Always immediately follows XmlDataLen field. (Can be embedded within encrypted data section.) See Appendix M – FIXML Support	FIX.4.2
347	MessageEncoding	String	N	Type of message encoding (non-ASCII characters) used in a message’s "Encoded" fields. Required if any "Encoding" fields are used. ▶ 4 enum values →	FIX.4.2
369	LastMsgSeqNumProcessed	int	N	The last MsgSeqNum value received and processed. Can be specified on every message sent. Useful for detecting a backlog with a counterparty.	FIX.4.2
370	OnBehalfOfSendingTime	UTCTimestamp	N	Used when a message is sent via a "hub" or "service bureau". If A sends to Q (the hub) who then sends to B via a separate FIX session, then when Q sends to B the value of this field should represent the SendingTime on the message A sent to Q. (always expressed in UTC (Universal Time Coordinated, also known as "GMT")	FIX.4.2

Tag	Name	Type	Req	Description	Added
93	SignatureLength	Length	N	Required when trailer contains signature. Note: Not to be included within SecureData field	FIX.4.0
89	Signature	data	N	Note: Not to be included within SecureData field	FIX.4.0
10	CheckSum	String	Y	(Always unencrypted, always last field in message)	FIX.4.0