 | Beliebiges geschlossenes Profil |
 | Arbitrary Closed Profile Def |
The closed profile IfcArbitraryClosedProfileDef defines an arbitrary two-dimensional profile for the use within the swept surface geometry, the swept area solid or a sectioned spine. It is given by an outer boundary from which the surface or solid can be constructed.
HISTORY New entity in IFC1.5. Entity has been renamed from IfcArbitraryProfileDef in IFC2x.
Informal Propositions:
Figure 405 illustrates the arbitrary closed profile definition. The OuterCurve is defined in the underlying coordinate system. The underlying coordinate system is defined by the swept surface or swept area solid that uses the profile definition. It is the xy plane of either:
or in case of sectioned spines the xy plane of each list member of IfcSectionedSpine.CrossSectionPositions. The OuterCurve attribute defines a two dimensional closed bounded curve.
 |
Figure 405 — Arbitrary closed profile |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 3 | OuterCurve | IfcCurve | Bounded curve, defining the outer boundaries of the arbitrary profile. | X |
| Rule | Description |
|---|---|
| WR1 | The curve used for the outer curve definition shall have the dimensionality of 2. |
| WR2 | The outer curve shall not be of type IfcLine as IfcLine is not a closed curve. |
| WR3 | The outer curve shall not be of type IfcOffsetCurve2D as it should not be defined as an offset of another curve. |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| IfcProfileDef | |||||
| 1 | ProfileType | IfcProfileTypeEnum | 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. | X | |
| 2 | ProfileName | IfcLabel | ? | 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. | X |
| HasExternalReference | IfcExternalReferenceRelationship @RelatedResourceObjects | S[0:?] | Reference to external information, e.g. library, classification, or document information, which is associated with the profile.
IFC4 CHANGE New inverse attribute | X | |
| HasProperties | IfcProfileProperties @ProfileDefinition | S[0:?] | Additional properties of the profile, for example mechanical properties.
IFC4 CHANGE New inverse attribute | X | |
| IfcArbitraryClosedProfileDef | |||||
| 3 | OuterCurve | IfcCurve | Bounded curve, defining the outer boundaries of the arbitrary profile. | X | |
| # | Concept | Template | Model View |
|---|---|---|---|
| IfcProfileDef | |||
| Property Sets for Objects | Property Sets for Objects | General Usage | |
<xs:element name="IfcArbitraryClosedProfileDef" type="ifc:IfcArbitraryClosedProfileDef" substitutionGroup="ifc:IfcProfileDef" nillable="true"/>
<xs:complexType name="IfcArbitraryClosedProfileDef">
<xs:complexContent>
<xs:extension base="ifc:IfcProfileDef">
<xs:sequence>
<xs:element name="OuterCurve" type="ifc:IfcCurve" nillable="true"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcArbitraryClosedProfileDef
SUPERTYPE OF(IfcArbitraryProfileDefWithVoids)
SUBTYPE OF (IfcProfileDef);
OuterCurve : IfcCurve;
WHERE
WR1 : OuterCurve.Dim = 2;
WR2 : NOT('IFCGEOMETRYRESOURCE.IfcLine' IN TYPEOF(OuterCurve));
WR3 : NOT('IFCGEOMETRYRESOURCE.IfcOffsetCurve2D' IN TYPEOF(OuterCurve));
END_ENTITY;
EXPRESS-G diagram
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