8.9.3.31 IfcElementarySurface

AbV ⓘ

ABSTRACT This definition may not be instantiated

8.9.3.31.1 Semantic definition

An IfcElementarySurface in the common supertype of analytical surfaces.

8.9.3.31.2 Entity inheritance

8.9.3.31.3 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. 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.
IfcSurface (1)
*	Dim	IfcDimensionCount	This attribute is formally derived. `3` The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item. IFC4-CHANGE Derived attribute promoted from subtypes.
Click to show 3 hidden 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 8.9.3.31.A

8.9.3.31.4 Formal representation

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

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

8.9.3.31 IfcElementarySurface

8.9.3.31.1 Semantic definition

8.9.3.31.2 Entity inheritance

8.9.3.31.3 Attributes

8.9.3.31.4 Formal representation

8.9.3.31.5 References