IfcBoundedSurface

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcBoundedSurface			MODIFIED	Instantiation changed to ABSTRACT.

Semantic definitions at the entity

Entity definition

An IfcBoundedSurface is a surface of finite area.

NOTE Definition according to ISO/CD 10303-42:1992
A bounded surface is a surface of finite area with identifiable boundaries.

NOTE Entity adapted from bounded_surface defined in ISO10303-42.

HISTORY New entity in IFC2x

IFC4 CHANGE Entity made abstract.

Informal Propositions:

A bounded surface has finite non-zero surface area.
A bounded surface has boundary curves.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	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
IfcSurface
	Dim :=3	IfcDimensionCount	[1:1]	The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item.	X
IfcBoundedSurface

Formal representations

XSD Specification

 <xs:element name="IfcBoundedSurface" type="ifc:IfcBoundedSurface" abstract="true" substitutionGroup="ifc:IfcSurface" nillable="true"/>

 <xs:complexType name="IfcBoundedSurface" abstract="true">

  <xs:complexContent>

   <xs:extension base="ifc:IfcSurface"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcBoundedSurface

 ABSTRACT SUPERTYPE OF(ONEOF(IfcBSplineSurface, IfcCurveBoundedPlane, IfcCurveBoundedSurface, IfcRectangularTrimmedSurface))

 SUBTYPE OF (IfcSurface);

END_ENTITY;

 EXPRESS-G diagram

	Begrenzte Oberfläche
	Bounded Surface
	Surface englobée