Name	Data Type	Definition
designator	TextDesignatorType	The full textual designator of the landing and take-off direction. Examples: 27, 35L, 01R.
trueBearing	ValBearingType	The measured angle between the runway direction and True North at a given position. Note : The True North is the north point at which the meridian lines meet.
trueBearingAccuracy	ValAngleType	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	A code indicating the direction of the VFR flight pattern at an aerodrome/heliport, i.e. left or right.
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)
elevationTDZ	ValDistanceVerticalType	Elevation of touch down zone: The value of the highest elevation of the runway Touch Down Zone (TDZ).
elevationTDZAccuracy	ValDistanceType	The accuracy of the reported Touch Down Zone elevation
approachMarkingType	CodeRunwayMarkingType	Type of marking related to landing categories such as precision, non-precision and basic.
approachMarkingCondition	CodeMarkingConditionType	The quality of the runway marking such as good, fair, poor and other.
classLightingJAR	CodeLightingJARType	Classification of the approach lighting system using as criteria JAR-OPS 1 - Subpart E, Appendix 1 to 1.430
precisionApproachGuidance	CodeApproachGuidanceType	Degree to which navigation aids provide accurate approach guidance. Precision approaches utilize both lateral (course) and vertical (glideslope) information

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

From	Association	Multiplicity	Role	To	Role description
RunwayCentrelinePoint	isLocatedOn	0..1	onRunway	Location of the runway centreline point.
RunwayProtectArea	protects	0..1	protectedRunwayDirection	The runway Direction protected by the protection area.
ApproachLightingSystem	serves	0..1	servedRunwayDirection	RunwayDirection lit by the ApproachLightingSystem.
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).
RunwayVisualRange	providesVisualRangeFor	0..*	associatedRunwayDirection	The RunwayDirection provided the RunwayVisualRange.
VisualGlideSlopeIndicator	providesGuidanceFor	0..1	runwayDirection	The runway direction associated with the VisualGlideSlopeIndicator.
RunwayBlastPad	isUsedOn	0..1	usedRunwayDirection	The RunwayDirection containing the blast pad.
RunwayDirectionLightSystem	isProvidedFor	0..1	associatedRunwayDirection	Runway direction associated with the RunwayDirectionLightSystem.
Navaid	isInstalledAt	0..*	runwayDirection	The landing and take-off directions of a runway
ObstacleAreaOrigin	isRunway	0..1	ownerRunway	The Ruwnay for which the Obstacle Area has been defined.
LandingTakeoffAreaCollection	isLocatedAt	0..*	runway	One of the two landing and take-off directions of a runway referenced by the procedure.

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