NewOrderSingle/FIX.5.0-5.0SP1

Message Content of NewOrderSingle (MsgType=D)

TagText	FieldName or ComponentName	Required	Description
	StandardHeader	x	MsgType = D
11	ClOrdID	x	Unique identifier of the order as assigned by institution or by the intermediary (CIV term, not a hub/service bureau) with closest association with the investor.
526	SecondaryClOrdID
583	ClOrdLinkID
	Parties		Insert here the set of "Parties" (firm identification) fields defined in "Common Components of Application Messages"
229	TradeOriginationDate
75	TradeDate
1	Account
660	AcctIDSource
581	AccountType		Type of account associated with the order (Origin)
589	DayBookingInst
590	BookingUnit
591	PreallocMethod
70	AllocID		Used to assign an overall allocation id to the block of preallocations
	PreAllocGrp		Number of repeating groups for pre-trade allocation
63	SettlType
64	SettlDate		Takes precedence over SettlType value and conditionally required/omitted for specific SettlType values.
544	CashMargin
635	ClearingFeeIndicator
21	HandlInst
18	ExecInst		Can contain multiple instructions, space delimited. If OrdType=P, exactly one of the following values (ExecInst = L, R, M, P, O, T, W, a, d) must be specified.
110	MinQty
1089	MatchIncrement
1090	MaxPriceLevels
	DisplayInstruction
111	MaxFloor
100	ExDestination
1133	ExDestinationIDSource
	TrdgSesGrp		Specifies the number of repeating TradingSessionIDs
81	ProcessCode		Used to identify soft trades at order entry.
	Instrument	x	Insert here the set of "Instrument" (symbology) fields defined in "Common Components of Application Messages"
	FinancingDetails		Insert here the set of "FinancingDetails" (symbology) fields defined in "Common Components of Application Messages"
	UndInstrmtGrp		Number of underlyings
140	PrevClosePx		Useful for verifying security identification
54	Side	x
114	LocateReqd		Required for short sell orders
60	TransactTime	x	Time this order request was initiated/released by the trader, trading system, or intermediary.
	Stipulations		Insert here the set of "Stipulations" (repeating group of Fixed Income stipulations) fields defined in "Common Components of Application Messages"
854	QtyType
	OrderQtyData	x	Insert here the set of "OrderQtyData" fields defined in "Common Components of Application Messages"
40	OrdType	x
423	PriceType
44	Price		Required for limit OrdTypes. For F/X orders, should be the "all-in" rate (spot rate adjusted for forward points). Can be used to specify a limit price for a pegged order, previously indicated, etc.
1092	PriceProtectionScope
99	StopPx		Required for OrdType = "Stop" or OrdType = "Stop limit".
	TriggeringInstruction		Insert here the set of "TriggeringInstruction" fields defined in "common components of application messages"
	SpreadOrBenchmarkCurveData		Insert here the set of "SpreadOrBenchmarkCurveData" (Fixed Income spread or benchmark curve) fields defined in "Common Components of Application Messages"
	YieldData		Insert here the set of "YieldData" (yield-related) fields defined in "Common Components of Application Messages"
15	Currency
376	ComplianceID
377	SolicitedFlag
23	IOIID		Required for Previously Indicated Orders (OrdType=E)
117	QuoteID		Required for Previously Quoted Orders (OrdType=D)
59	TimeInForce		Absence of this field indicates Day order
168	EffectiveTime		Can specify the time at which the order should be considered valid
432	ExpireDate		Conditionally required if TimeInForce = GTD and ExpireTime is not specified.
126	ExpireTime		Conditionally required if TimeInForce = GTD and ExpireDate is not specified.
427	GTBookingInst		States whether executions are booked out or accumulated on a partially filled GT order
	CommissionData		Insert here the set of "CommissionData" fields defined in "Common Components of Application Messages"
528	OrderCapacity
529	OrderRestrictions
1091	PreTradeAnonymity
582	CustOrderCapacity
121	ForexReq		Indicates that broker is requested to execute a Forex accommodation trade in conjunction with the security trade.
120	SettlCurrency		Required if ForexReq = Y.
775	BookingType		Method for booking out this order. Used when notifying a broker that an order to be settled by that broker is to be booked out as an OTC derivative (e.g. CFD or similar). Absence of this field implies regular booking.
58	Text
354	EncodedTextLen		Must be set if EncodedText field is specified and must immediately precede it.
355	EncodedText		Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field.
193	SettlDate2		Can be used with OrdType = "Forex - Swap" to specify the "value date" for the future portion of a F/X swap.
192	OrderQty2		Can be used with OrdType = "Forex - Swap" to specify the order quantity for the future portion of a F/X swap.
640	Price2		Can be used with OrdType = "Forex - Swap" to specify the price for the future portion of a F/X swap which is also a limit order. For F/X orders, should be the "all-in" rate (spot rate adjusted for forward points).
77	PositionEffect		For use in derivatives omnibus accounting
203	CoveredOrUncovered		For use with derivatives, such as options
210	MaxShow
	PegInstructions		Insert here the set of "PegInstruction" fields defined in "Common Components of Application Messages"
	DiscretionInstructions		Insert here the set of "DiscretionInstruction" fields defined in "Common Components of Application Messages"
847	TargetStrategy		The target strategy of the order
	StrategyParametersGrp		Strategy parameter block
848	TargetStrategyParameters		For further specification of the TargetStrategy
849	ParticipationRate		Mandatory for a TargetStrategy=Participate order and specifies the target particpation rate. For other order types optionally specifies a volume limit (i.e. do not be more than this percent of the market volume)
480	CancellationRights		For CIV - Optional
481	MoneyLaunderingStatus
513	RegistID		Reference to Registration Instructions message for this Order.
494	Designation		Supplementary registration information for this Order
1028	ManualOrderIndicator
1029	CustDirectedOrder
1030	ReceivedDeptID
1031	CustOrderHandlingInst
1032	OrderHandlingInstSource
	TrdRegTimestamps
1080	RefOrderID		Required for counter-order selection / Hit / Take Orders. (OrdType = Q)
1081	RefOrderIDSource		Conditionally required if RefOrderID is specified.
	StandardTrailer	x

Notes

Please post comments, clarifications, examples here. Click on the edit button on the right and away you go! 

Don't forget to refer to the FPL Discussion Groups to back up anything you write.
You will often find the authoritative statements on matters of FIX specification interpretation there.
Links from FIXwiki pages to relevant discussions on the FPL site are very valuable.

For example if you were writing a clarification on how to specify the "quantity" of an order in FIX, you might add the
following relevant link, http://www.fixprotocol.org/discuss/read/f5014573, to back up your points.