This choice has no attribute.

Association	Multiplicity	Role	To	Role description
	0..1	fixDesignatedPoint	DesignatedPoint	A selected point that may have references (distance and/or angle indications)
	0..1	navaidSystem	Navaid	A navaid used as significant point.
	0..1	aimingPoint	TouchDownLiftOff	The point at the centre of the TLOF.
	0..1	runwayPoint	RunwayCentrelinePoint	A designated point on the runway centreline.
	0..1	airportReferencePoint	AirportHeliport	the point designated as the center of the airport.
	0..1	position	Point	An unnamed point designated only with a latitude/longitude.

From	Association	Multiplicity	Role	To	Role description
SegmentPoint	isLocatedAt	0..1	pointChoice	A choice of a navaid, an airport reference point, a TLOF aiming Point, a fix , a lat/long indicated by point object, or a Rwy threshold that defines the point.
AngleIndication	uses	0..1	pointChoice	A choice of a navaid, an airport reference point, a TLOF aiming Point, a fix , a lat/long indicated by point object, or a Rwy threshold which defines the facility makeup..
DistanceIndication	uses	0..1	pointChoice	A choice of a navaid, an airport reference point, a TLOF aiming Point, a fix , a lat/long indicated by point object, or a Rwy threshold which defines the facility makeup.
SignificantPointInAirspace	isLocatedAt	0..1	location	The location of the SignificantPointInAirspace.
TerminalArrivalArea	isUsedForDistance	0..1	IF	The Intermediate fix. The ending point of the initial segment and the starting point of the intermediate segment.
TerminalArrivalArea	isUsedForAngle	0..1	IAF	Initial Approach Fix. The starting point of the Initial Segment.
NavigationArea	isBasedOn	0..1	centrePoint	The point which the navigation area is based on.
FinalLeg	isAlignedBy	0..1	finalPathAlignmentPoint	A point defined by a latitude, longitude and MSL elevation used in conjunction with the LTP and the geometric center of the WGS-84 ellipsoid to define the vertical plane of a PA RNAV final approach course.
SafeAltitudeArea	isBasedOn	0..1	centrePoint	The point used to build the Safe Altitude Area.
DirectFlightSegment	endsAt	0..1	end	End point of a direct flight segment.
DirectFlightSegment	startsAt	0..1	start	Start of a direct flight segment.
FlightConditionElementChoice		0..1	significantPointCondition	A condition based on a SignificantPoint.
FlightRoutingElementChoice		0..1	pointElement	Significant Point which is impacted by a flight restriction.
RoutePortion	startsAt	0..1	start	The starting SignificantPoint for the route portion.
RoutePortion	passesThrough	0..1	intermediatePoint	The intermedia SignificantPoint for the route portion used to uniquely identify a route portion.
ChangeOverPoint	isLocatedAt	0..1	location	Location of the change over point.
RoutePortion	endsAt	0..1	end	The ending SignificantPoint for the route portion.

1 - Airspace Feature , 1 - Minimum and Emergency Safe Altitude , 1 - Segment Points , 1 - Significant Points , 1 - Terminal Arrival Area , 2 - Airspace Associations , 2 - Flight Restriction - conditions , 2 - NavigationArea , 2 - Point Reference , 2 - Unplanned Holding , 3 - Flight Restriction - routings , 3 - Route Portion , 4 - SegmentLegSpecialization , 5 - Route Portion Change Over Points