IFC 4.3.0.1 (IFC4X3_TC1)

8.9.3.46 IfcPlacement

ABSTRACT This definition may not be instantiated

8.9.3.46.1 Semantic definition

An IfcPlacement is an abstract supertype of placement subtypes that define the location of an item, or an entire shape representation, and provide its orientation. All placement subtypes define right-handed Cartesian coordinate systems and do not allow mirroring.

8.9.3.46.2 Entity inheritance

8.9.3.46.3 Attributes

# Attribute Type Description
IfcRepresentationItem (2)
LayerAssignment SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems

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.

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.

Click to show 2 hidden inherited attributes Click to hide 2 inherited attributes
IfcPlacement (2)
1 Location IfcPoint

The geometric position of a reference point, such as the center of a circle, of the item to be located.

* Dim IfcDimensionCount

This attribute is formally derived.

Location.Dim

The space dimensionality of this class, derived from the dimensionality of the location.

Table 8.9.3.46.A

8.9.3.46.4 Formal representation

ENTITY IfcPlacement
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcAxis1Placement
	,IfcAxis2Placement2D
	,IfcAxis2Placement3D
	,IfcAxis2PlacementLinear))
 SUBTYPE OF (IfcGeometricRepresentationItem);
	Location : IfcPoint;
 DERIVE
	 Dim : IfcDimensionCount := Location.Dim;
END_ENTITY;

8.9.3.46.5 References

8.9.3.46.6 Changelog

8.9.3.46.6.1 IFC4.3_TC1