IfcPoint是笛卡尔坐标系中所有点表示的抽象概括。
注：定义根据ISO/CD 10303-42:1992
对于m=1、2或3，点是某个实际笛卡尔坐标空间Rm中的一个位置。
注：实体改编自ISO 10303-42中的点。
IFC1.5中增加的新实体
| # | Attribute | Type | Cardinality | Description | C |
|---|---|---|---|---|---|
| IfcRepresentationItem | |||||
| LayerAssignment | IfcPresentationLayerAssignment @AssignedItems |
S[0:1] | Assignment 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. | X | |
| StyledByItem | IfcStyledItem @Item |
S[0:1] | Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. | X | |
| IfcGeometricRepresentationItem | |||||
| IfcPoint | |||||
ENTITY IfcPoint
ABSTRACT SUPERTYPE OF(ONEOF(IfcCartesianPoint, IfcPointOnCurve, IfcPointOnSurface))
SUBTYPE OF (IfcGeometricRepresentationItem);
END_ENTITY;
原文：https://www.cnblogs.com/herd/p/13428273.html