#### IfcBoundedCurve

Natural language names

##### Semantic definitions at the entity

Entity definition

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

> NOTE Corresponding STEP name: bounded_curve, only the following subtypes have been incorporated into IFC: polyline as IfcPolyline, trimmed_curve as IfcTrimmedCurve, composite_curve as IfcCompositeCurve. Please refer to ISO/IS 10303-42:1994, p.44 for the final definition of the formal standard.

> HISTORY New class in IFC Release 1.0

Informal propositions:

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

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | A
--- | --- | --- | --- | --- | ---
IfcRepresentationItem
IfcGeometricRepresentationItem
IfcCurve
| Dim :=IfcCurveDim(SELF) | IfcDimensionCount | [1:1] | The space dimensionality of this abstract class, defined differently for all subtypes, i.e. for IfcLine, IfcConic and IfcBoundedCurve. | X
IfcBoundedCurve

##### Formal representations

XSD 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(IfcCompositeCurve, IfcPolyline, IfcTrimmedCurve))
SUBTYPE OF (IfcCurve);
END_ENTITY;

EXPRESS-G diagram

`

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