IfcBoundedCurve

Semantic definitions at the entity

Entity definition

An IfcBoundedCurve is a curve of finite length.

NOTE Definition according to ISO/CD 10303-42:1992
A bounded curve is a curve of finite arc length with identifiable end points.

NOTE Entity adapted from bounded_curve defined in ISO10303-42.

HISTORY New entity in IFC1.0

Informal Propositions:

A bounded curve has finite arc length.
A bounded curve has a start point and an end point.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
	PositioningElement	IfcLinearPositioningElement @Axis	? S[0:1]		X

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
IfcCurve
	Dim :=IfcCurveDim(SELF)	IfcDimensionCount		The space dimensionality of this abstract class, defined differently for all subtypes, i.e. for IfcLine, IfcConic and IfcBoundedCurve.	X
IfcBoundedCurve
	PositioningElement	IfcLinearPositioningElement @Axis	? S[0:1]		X

Formal representations

XML Specification

 <xs:element name="IfcBoundedCurve" type="ifc:IfcBoundedCurve" abstract="true" substitutionGroup="ifc:IfcCurve" nillable="true"/>

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

  <xs:complexContent>

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

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcBoundedCurve

 ABSTRACT SUPERTYPE OF(ONEOF(IfcAlignmentCurve, IfcBSplineCurve, IfcCompositeCurve, IfcCurveSegment2D, IfcIndexedPolyCurve, IfcPolyline, IfcTrimmedCurve))

 SUBTYPE OF (IfcCurve);

 INVERSE

  PositioningElement : SET [0:1] OF IfcLinearPositioningElement FOR Axis;

END_ENTITY;

 EXPRESS-G diagram

	Begrenzte Kurve
	Bounded Curve
	Courbe englobée