IfcOffsetCurve

Natural language names
Offset Curve
Change log
ItemSPFXMLChangeDescription
IFC4x1 Final 4.1.0.0
    IfcOffsetCurveADDED
Semantic definitions at the entity
Entity definition

An IfcOffsetCurve is an abstract entity describing a curve that is defined relative to another curve according to an offset that may be constant or variable along the referenced curve.

Attribute definitions
#AttributeTypeCardinalityDescription G
1BasisCurveIfcCurve The curve that is being offset. X
Inherited definitions from supertypes
Entity inheritance IfcOffsetCurve2D IfcOffsetCurve3D IfcOffsetCurveByDistances IfcCurve 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
IfcCurve
Dim
:=IfcCurveDim(SELF)
IfcDimensionCountThe space dimensionality of this abstract class, defined differently for all subtypes, i.e. for IfcLine, IfcConic and IfcBoundedCurve. X
IfcOffsetCurve
1BasisCurveIfcCurve The curve that is being offset. X
Formal representations
XML Specification
 <xs:element name="IfcOffsetCurve" type="ifc:IfcOffsetCurve" abstract="true" substitutionGroup="ifc:IfcCurve" nillable="true"/>
 <xs:complexType name="IfcOffsetCurve" abstract="true">
  <xs:complexContent>
   <xs:extension base="ifc:IfcCurve">
    <xs:sequence>
     <xs:element name="BasisCurve" type="ifc:IfcCurve" nillable="true"/>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcOffsetCurve
 ABSTRACT SUPERTYPE OF(ONEOF(IfcOffsetCurve2D, IfcOffsetCurve3D, IfcOffsetCurveByDistances))
 SUBTYPE OF (IfcCurve);
  BasisCurve : IfcCurve;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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