184.108.40.206.1 Semantic definition
The open profile IfcArbitraryOpenProfileDef defines an arbitrary two-dimensional open profile for the use within the swept surface geometry. It is given by an open boundary from which the surface can be constructed.
- The Curve has to be an open curve.
Figure 220.127.116.11.A illustrates the arbitrary open profile definition. The Curve is defined in the underlying coordinate system. The underlying coordinate system is defined by the swept surface that uses the profile definition. It is the xy plane of:
The Curve attribute defines a two dimensional open bounded curve.
18.104.22.168.2 Entity inheritance
Defines the type of geometry into which this profile definition shall be resolved, either a curve or a surface area. In case of curve the profile should be referenced by a swept surface, in case of area the profile should be referenced by a swept area solid.
Human-readable name of the profile, for example according to a standard profile table. As noted above, machine-readable standardized profile designations should be provided in IfcExternalReference.ItemReference.
|HasExternalReference||SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects||
Reference to external information, e.g. library, classification, or document information, which is associated with the profile.
|HasProperties||SET [0:?] OF IfcProfileProperties FOR ProfileDefinition||
Additional properties of the profile, for example mechanical properties.
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Open bounded curve defining the profile.
22.214.171.124.4 Formal propositions
The profile type is a .CURVE., an open profile can only be used to define a swept surface.
The dimensionality of the curve shall be 2.
126.96.36.199.5 Property sets
188.8.131.52.6 Concept usage
|Property Sets for Profiles||General||
This concept can be applied to the following resources:
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184.108.40.206.7 Formal representation
ENTITY IfcArbitraryOpenProfileDef SUPERTYPE OF (ONEOF (IfcCenterLineProfileDef)) SUBTYPE OF (IfcProfileDef); Curve : IfcBoundedCurve; WHERE WR11 : ('IFC4X3_DEV_d297a43.IFCCENTERLINEPROFILEDEF' IN TYPEOF(SELF)) OR (SELF\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE); WR12 : Curve.Dim = 2; END_ENTITY;