 | Beliebiges offenes Profil |
 | Arbitrary Open Profile Def |
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.
HISTORY New entity in IFC2x.
Informal Propositions:
Figure 406 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.
 |
Figure 406 — Arbitrary open profile |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 3 | Curve | IfcBoundedCurve | Open bounded curve defining the profile. | X |
| Rule | Description |
|---|---|
| WR11 | The profile type is a .CURVE., an open profile can only be used to define a swept surface.
Note This does not apply to the subtype IfcCentreLineProfileDef. |
| WR12 | The dimensionality of the curve shall be 2. |
| # | 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 | |
| IfcArbitraryOpenProfileDef | |||||
| 3 | Curve | IfcBoundedCurve | Open bounded curve defining the profile. | X | |
| # | Concept | Template | Model View |
|---|---|---|---|
| IfcProfileDef | |||
| Property Sets for Objects | Property Sets for Objects | General Usage | |
<xs:element name="IfcArbitraryOpenProfileDef" type="ifc:IfcArbitraryOpenProfileDef" substitutionGroup="ifc:IfcProfileDef" nillable="true"/>
<xs:complexType name="IfcArbitraryOpenProfileDef">
<xs:complexContent>
<xs:extension base="ifc:IfcProfileDef">
<xs:sequence>
<xs:element name="Curve" type="ifc:IfcBoundedCurve" nillable="true"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcArbitraryOpenProfileDef
SUPERTYPE OF(IfcCenterLineProfileDef)
SUBTYPE OF (IfcProfileDef);
Curve : IfcBoundedCurve;
WHERE
WR11 : ('IFCPROFILERESOURCE.IfcCenterLineProfileDef' IN TYPEOF(SELF)) OR
(SELF\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE);
WR12 : Curve.Dim = 2;
END_ENTITY;
EXPRESS-G diagram
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