IFC 4.3.x development

8.9.3.48 IfcPoint

8.9.3.48.1 Semantic definitions at the entity

The IfcPoint is the abstract generalisation of all point representations within a Cartesian coordinate system.

NOTE  Definition according to ISO/CD 10303-42:1992
A point is a location in some real Cartesian coordinate space R^m^, for m = 1, 2 or 3.

NOTE  Entity adapted from point in ISO 10303-42.

HISTORY  New entity in IFC1.5

# Attribute Type Description
IfcRepresentationItem
LayerAssignmentSET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItemsAssignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.

> IFC2x3 CHANGE  The inverse attribute LayerAssignments has been added.

> IFC4 CHANGE  The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
StyledByItem SET [0:1] OF IfcStyledItem FOR Item Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.



> IFC2x3 CHANGE  The inverse attribute StyledByItem has been added.

8.9.3.48.1 Entity inheritance

dot_inheritance IfcPoint_children 3 more... IfcPoint IfcPoint IfcPoint_children->IfcPoint IfcGeometricRepresentationItem IfcGeometricRepresentationItem IfcPoint->IfcGeometricRepresentationItem IfcGeometricRepresentationItem_children 24 more... IfcGeometricRepresentationItem_children->IfcGeometricRepresentationItem IfcRepresentationItem IfcRepresentationItem IfcGeometricRepresentationItem->IfcRepresentationItem IfcRepresentationItem_children 3 more... IfcRepresentationItem_children->IfcRepresentationItem

8.9.3.48.2 Formal representations

ENTITY IfcPoint
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcCartesianPoint
	,IfcPointByDistanceExpression
	,IfcPointOnCurve
	,IfcPointOnSurface))
 SUBTYPE OF (IfcGeometricRepresentationItem);
END_ENTITY;