|Modifikator (geometrischer Körper)|
A feature element is a generalization of all existence
dependent elements which modify the shape and appearance of the
associated master element. The IfcFeatureElement offers
the ability to handle shape modifiers as semantic objects within
the IFC object model.
NOTE The term "feature" has a predefined meaning in a
context of "feature-based modeling" and within steel construction
work. It is introduced here in a broader sense to cover all
existence dependent, but semantically described, modifiers of an
element's shape and appearance. It is envisioned that future
releases enhance the feature-based capabilities of the IFC
In contrary to the aggregation, as used in
IfcElementAssembly, that defines the aggregate as a
container element, that has equally treated parts, the feature
concept introduced by IfcFeatureElement defines the master
element with subordinate parts as additions, or with voids or
cut-outs as subtractions.
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
Common Use Definitions
The following concepts are inherited at supertypes:
- IfcRoot: Identity, Revision Control
- IfcElement: Property Sets for Objects, Product Placement, Box Geometry, FootPrint Geometry, Body SurfaceOrSolidModel Geometry, Body SurfaceModel Geometry, Body Tessellation Geometry, Body Brep Geometry, Body AdvancedBrep Geometry, Body CSG Geometry, Mapped Geometry
The Spatial Containment concept applies to this entity.
As a subordinate part being fully dependent on the master
element the IfcFeatureElement shall have no independent
containment relationship to the spatial structure.
- The SELF\IfcElement.ContainedInStructure relationship
shall be NIL.
XSD Specification: <xs:element name="IfcFeatureElement" type="ifc:IfcFeatureElement" abstract="true" substitutionGroup="ifc:IfcElement" nillable="true"/>
<xs:complexType name="IfcFeatureElement" abstract="true">
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