IFC 4.3.x development

8.15.3.2 IfcArbitraryOpenProfileDef

Change log

IFC4

modificationswhere_rules WR11 definitionChanged from ('ifc2x3.ifccenterlineprofiledef' in typeof(self)) or (self\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE) to ('ifc4.ifccenterlineprofiledef' in typeof(self)) or (self\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE)

IFC4X1

modificationswhere_rules WR11 definitionChanged from ('ifc4.ifccenterlineprofiledef' in typeof(self)) or (self\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE) to ('ifc4x1.ifccenterlineprofiledef' in typeof(self)) or (self\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE)

IFC4X2

modificationswhere_rules WR11 definitionChanged from ('ifc4x1.ifccenterlineprofiledef' in typeof(self)) or (self\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE) to ('ifc4x2.ifccenterlineprofiledef' in typeof(self)) or (self\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE)

IFC4X3_RC3

modificationswhere_rules WR11 definitionChanged from ('ifc4x2.ifccenterlineprofiledef' in typeof(self)) or (self\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE) to ('ifc4x3_rc3.ifccenterlineprofiledef' in typeof(self)) or (self\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE)

8.15.3.2.1 Semantic definitions at the entity

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:

  1. The Curve has to be an open curve.

Figure 1 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.

"arbitrary profile without boundaries"

8.15.3.2.1 Attributes

# Attribute Type Description
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.
2 ProfileName OPTIONAL 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_.
HasExternalReferenceSET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjectsReference to external information, e.g. library, classification, or document information, which is associated with the profile.

> IFC4 CHANGE New inverse attribute
HasProperties SET [0:?] OF IfcProfileProperties FOR ProfileDefinition Additional properties of the profile, for example mechanical properties.

> IFC4 CHANGE New inverse attribute
IfcArbitraryOpenProfileDef
3 Curve IfcBoundedCurve Open bounded curve defining the profile.

8.15.3.2.2 Entity inheritance

dot_inheritance IfcCenterLineProfileDef IfcCenterLineProfileDef IfcArbitraryOpenProfileDef IfcArbitraryOpenProfileDef IfcCenterLineProfileDef->IfcArbitraryOpenProfileDef IfcProfileDef IfcProfileDef IfcArbitraryOpenProfileDef->IfcProfileDef IfcProfileDef_children 5 more... IfcProfileDef_children->IfcProfileDef

8.15.3.2.3 Definitions applying to General Usage

8.15.3.2.3.1 Property Sets for Objects

PsetName
'Pset_ProfileMechanical'

8.15.3.2.4 Formal representations

ENTITY IfcArbitraryOpenProfileDef
 SUPERTYPE OF (ONEOF
	(IfcCenterLineProfileDef))
 SUBTYPE OF (IfcProfileDef);
	Curve : IfcBoundedCurve;
 WHERE
	WR11 : ('IFC4X3_DEV_a1492713.IFCCENTERLINEPROFILEDEF' IN TYPEOF(SELF)) OR 
 (SELF\IfcProfileDef.ProfileType = IfcProfileTypeEnum.CURVE);
	WR12 : Curve.Dim = 2;
END_ENTITY;