from IAI: Objectified
relationship between an opening element and an
element that fills (or partially fills) the opening element.
The insertion of a window into a wall is represented by two
separate relationships. First the window opening is created within the
wall by IfcWall(StandardCase)
o-- IfcRelVoidsElement --o IfcOpeningElement,
then the window is inserted within the opening by IfcOpeningElement
o-- IfcRelFillsElement --o IfcWindow.
HISTORY New entity
in IFC Release 1.0
|| Opening Element being filled by virtue of this relationship.
|building element that occupies fully or partially the associated opening.
IFC2x PLATFORM CHANGE: The data type has been changed from IfcBuildingElement to IfcElement with upward compatibility for file based exchange.