Definition from buildingSMART: Objectified relationship
building element and one opening
element that creates a void in the element. It is a one-to-one
relationship. This relationship implies a Boolean operation of
subtraction between the geometric bodies of the element and
Figure The insertion of a void into a wall is
represented by the relationship IfcRelVoidsElement.
The opening is created within the wall by
IfcWall(StandardCase) o-- IfcRelVoidsElement --o
HISTORY New entity in IFC
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 for file based exchange.
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 for file based exchange.