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IfcRelVoidsElement

Definition from IAI: Objectified Relationship between an building element and one opening element that creates a void in the element. This relationship implies a Boolean Operation of subtraction for the geometric bodies of Element and Opening Element.

HISTORY New entity in IFC Release 1.0
ISSUE See issue log for changes made in IFC Release 1.5.1.

EXPRESS specification:

ENTITY IfcRelVoidsElement
SUBTYPE OF ( IfcRelConnects);
RelatingBuildingElement  :  IfcElement;
RelatedOpeningElement  :  IfcFeatureElementSubtraction;
END_ENTITY;

Attribute definitions:

RelatingBuildingElement  :  Reference to building element in which a void is created by associated opening feature subtraction element.
IFC2x PLATFORM CHANGE: The data type has been changed from IfcBuildingElement to IfcElement with upward compatibility
RelatedOpeningElement  : 

Reference to the opening feature subtraction element which defines a void in the associated opening element.

IFC2x PLATFORM CHANGE: The data type has been changed from IfcOpeningElement to IfcFeatureElementSubtraction with upward compatibility

Inheritance graph

ENTITY IfcRelVoidsElement;
ENTITY IfcRoot;
GlobalId  :  IfcGloballyUniqueId;
OwnerHistory  :  IfcOwnerHistory;
Name  :  OPTIONAL IfcLabel;
Description  :  OPTIONAL IfcText;
ENTITY IfcRelationship;
ENTITY IfcRelConnects;
ENTITY IfcRelVoidsElement;
RelatingBuildingElement  :  IfcElement;
RelatedOpeningElement  :  IfcFeatureElementSubtraction;
END_ENTITY;