IfcBoundedSurface

Natural language names
Begrenzte Oberfläche
Bounded Surface
Surface englobée
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcBoundedSurfaceMODIFIEDInstantiation 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:

  1. A bounded surface has finite non-zero surface area.
  2. A bounded surface has boundary curves.
Inherited definitions from supertypes
Entity inheritance IfcBSplineSurface IfcCurveBoundedPlane IfcCurveBoundedSurface IfcRectangularTrimmedSurface IfcSurface IfcGeometricRepresentationItem IfcRepresentationItem
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRepresentationItem
LayerAssignmentIfcPresentationLayerAssignment
@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
StyledByItemIfcStyledItem
@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
IfcDimensionCountThe 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;

Link to EXPRESS-G diagram EXPRESS-G diagram

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