Name	Data Type	Definition
designator	TextDesignatorType	A designator for one of the two possible landing and/or take-off directions of a runway or Final Approach and Take-off Area (FATO).
trueBearing	ValBearingType	The measured angle between the runway direction and True North at a given position.
trueBearingAccuracy	ValAngleType	The accuracy of the measured angle between the runway direction and True North at a given position.
magneticBearing	ValBearingType	The measured angle between the runway direction and Magnetic North at a given position.
patternVFR	CodeDirectionTurnType	The direction, i.e. left or right, of the Visual Flight Rules (VFR) flight pattern at an aerodrome/heliport for a runway direction.
slopeTDZ	ValSlopeType	Touchdown zone longitudinal slope (slope of 1/3 of the runway length from threshold or first 3000 feet for runways longer than 9000 feet) for a runway direction.
elevationTDZ	ValDistanceVerticalType	The highest elevation of the runway Touch Down Zone (TDZ) for a runway direction.
elevationTDZAccuracy	ValDistanceType	The accuracy of the reported Touch Down Zone elevation of runway direction.
approachMarkingType	CodeRunwayMarkingType	The type of runway direction marking related to landing categories such as precision, non-precision and basic.
approachMarkingCondition	CodeMarkingConditionType	The quality of the runway direction marking such as good, fair, poor and other.
classLightingJAR	CodeLightingJARType	A classification of the approach lighting system for a runway direction using as criteria Joint Aviation Requirements JAR-OPS 1 - Subpart E, Appendix 1 to 1.430.
precisionApproachGuidance	CodeApproachGuidanceType	Degree to which navigation aids provide accurate approach guidance for a runway direction.

Association	Multiplicity	Role	To	Role description
isOperationalBy	0..*	availability	ManoeuvringAreaAvailability	The operational status of the RunwayDirection.
uses	0..1	usedRunway	Runway	The runway used by the RunwayDirection.
hasAnnotations	0..*	annotation	Note
hasStart	0..1	startingElement	RunwayElement	The RunwayElement that starts the RunwayDirection.

From	Association	Multiplicity	Role	To	Role description
ApproachLightingSystem	serves	0..1	servedRunwayDirection	RunwayDirection lit by the ApproachLightingSystem.
RunwayDirectionLightSystem	isProvidedFor	0..1	associatedRunwayDirection	Runway direction associated with the RunwayDirectionLightSystem.
ArrestingGear	isUsedOn	0..*	runwayDirection	(DO272/ED99) The value of an ArrestingGearLocation feature's attribute idthr shall be identical to the value of its operationally corresponding RunwayThresholds feature's attribute idthr (Rule 16). (Note: Implied rule is Arresting Gear is used on a particilar runway direction).
RunwayBlastPad	isUsedOn	0..1	usedRunwayDirection	The RunwayDirection containing the blast pad.
RunwayCentrelinePoint	isLocatedOn	0..1	onRunway	Location of the runway centreline point.
ObstacleAreaOrigin	isRunway	0..1	ownerRunway	The Ruwnay for which the Obstacle Area has been defined.
RunwayProtectArea	protects	0..1	protectedRunwayDirection	The runway Direction protected by the protection area.
Navaid	isInstalledAt	0..*	runwayDirection	The landing and take-off directions of a runway
RunwayVisualRange	providesVisualRangeFor	0..*	associatedRunwayDirection	The RunwayDirection provided the RunwayVisualRange.
VisualGlideSlopeIndicator	providesGuidanceFor	0..1	runwayDirection	The runway direction associated with the VisualGlideSlopeIndicator.
LandingTakeoffAreaCollection	isLocatedAt	0..*	runway	One of the two landing and take-off directions of a runway referenced by the procedure.

1 - Navaids , 1 - Runway , 2 - Runway Direction , 2 - Surface Lighting Elements , 3 - Obstacle Areas , 3 - Runway Operational Point , 4 - Manoeuvering Area Availability , 4 - Runway Protection , 5 - LandingTakeOffArea , 5 - Runway Visual Range , 6 - Runway Blast Pad