|Modifikator (geometrischer Körper) - Addition|
A feature element addition is a specialization of the general
feature element, that represents an existence dependent
element which modifies the shape and appearance of the
associated master element. The
IfcFeatureElementAddition offers the ability to
handle shape modifiers as semantic objects within the IFC
object model that add to the shape of the master element.
HISTORY New entity in IFC2x2.
IFC2x2 CHANGE The entity is introduced as an upward compatible extension of the IFC2x
platform. It is an intermediate abstract supertype without defining its own explicit attributes.
The IfcFeatureElementAddition is associated to its
master element by virtue of the objectified relationship
IfcRelProjectsElement. This relationship implies a
Boolean 'union' operation between the shape of the master
element and the shape of the addition feature.
Geometry Use Definitions
The geometric representation of
IfcFeatureElementAddition is given by the
IfcProductDefinitionShape, allowing multiple
The local placement for IfcFeatureElementAddition is
defined in its supertype IfcProduct. It is defined
by the IfcLocalPlacement, which defines the local
coordinate system that is referenced by all geometric
representations. The local placement is always defined in
relation to the local placement of the element to which the
feature element is added:
- The PlacementRelTo relationship of
IfcLocalPlacement shall point to the local placement
of the same IfcElement, which is used in the
The geometry use definitions for the shape representation
of the IfcFeatureElementAddition is given at the
level of its subtypes.
XSD Specification: <xs:element name="IfcFeatureElementAddition" type="ifc:IfcFeatureElementAddition" abstract="true" substitutionGroup="ifc:IfcFeatureElement" nillable="true"/>
<xs:complexType name="IfcFeatureElementAddition" abstract="true">
|ProjectsElements|| : ||
Reference to the IfcRelProjectsElement relationship that uses this IfcFeatureElementAddition to create a volume addition at an element. The IfcFeatureElementAddition can only be used to create a single addition at a single element using Boolean addition operation.
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