IFC 4.3.0.1 (IFC4X3) development

8.9.3.32 IfcElementarySurface

ABSTRACT This definition may not be instantiated

8.9.3.32.1 Semantic definition

An IfcElementarySurface in the common supertype of analytical surfaces.

8.9.3.32.2 Entity inheritance

8.9.3.32.3 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.

IfcSurface (1)
* Dim IfcDimensionCount

This attribute is formally derived.

3

The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item.

Click to show 3 hidden inherited attributes Click to hide 3 inherited attributes
IfcElementarySurface (1)
1 Position IfcAxis2Placement3D

The position and orientation of the surface. This attribute is used in the definition of the parameterization of the surface.

Table 8.9.3.32.A

8.9.3.32.4 Formal representation

ENTITY IfcElementarySurface
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcCylindricalSurface
	,IfcPlane
	,IfcSphericalSurface
	,IfcToroidalSurface))
 SUBTYPE OF (IfcSurface);
	Position : IfcAxis2Placement3D;
END_ENTITY;

8.9.3.32.5 References

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