Name	Data Type	Definition
communicationFailureInstruction	TextInstructionType	Operational instructions which must be observed in case of communication failure.
instruction	TextInstructionType	Some free text to describe operational instructions (other than communication failure instructions) which must be respected when flying the Procedure.
designCriteria	CodeDesignStandardType	Rules used in the design of the procedure.
codingStandard	CodeProcedureCodingStandardType	The set of rules followed when encoding the procedure legs
flightChecked	CodeYesNoType	Indicates if the procedure has been flight checked.
name	TextNameType	The name of the instrument procedure.
RNAV	CodeYesNoType	Indicates the procedure is an RNAV procedure

Association	Multiplicity	Role	To	Role description
services	0..*	airportHeliport	AirportHeliport
isBasedOn	0..*	guidanceFacility	GuidanceService	The guidance facility on which the Procedure is based
hasAnnotations	0..*	annotation	Note
isProtectedBy	0..2	safeAltitude	SafeAltitudeArea	A series of minimum altitudes in the area where the procedure is executed.
contains	0..*	flightTransition	ProcedureTransition
isActiveBy	0..*	availability	ProcedureAvailability	The operational availability of the Procedure.
isLimitedTo	0..*	aircraftCharacteristic	AircraftCharacteristic	aircraft equipment or category limits

From	Association	Multiplicity	Role	To	Role description
NavigationAreaRestriction	isAppliedTo	0..*	procedure	A series of predetermined manoeuvres with specified protection from obstacles
AirTrafficControlService	controls	0..*	clientProcedure	The procedure on which the air traffic control service is provided.
InformationService	concerns	0..*	clientProcedure	The procedure for which the information is provided.

This class is specialized into: InstrumentApproachProcedure , StandardInstrumentArrival , StandardInstrumentDeparture

1 - Approach Procedure Overview , 1 - Overview , 1 - ProcedureUsage , 1 - SID , 1 - STAR , 1- Minimum and Emergency Safe Altitude , 2 - Restricted Navigation , 4 - Information Service , 5 - Air Traffic Control Services