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	G
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. 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.	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. IFC2x3 CHANGE The inverse attribute StyledByItem has been added.	X
IfcGeometricRepresentationItem
IfcSurface
	Dim :=3	IfcDimensionCount		The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item. IFC4 CHANGE Derived attribute promoted from subtypes.	X
IfcBoundedSurface

Formal representations

XML 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