Definition from buildingSMART: Objectified relationship
between an opening element and an
element that fills (or partially fills) the opening
element. It is an one-to-one relationship.
NOTE view definitions or implementer agreements
may restrict an opening to be filled by one filling
Figure The insertion of a door into a wall is
represented by two separate relationships. First the
door opening is created within the wall by
IfcWall(StandardCase) o-- IfcRelVoidsElement --o
IfcOpeningElement, then the door is inserted within
the opening by IfcOpeningElement o--
IfcRelFillsElement --o IfcDoor.
HISTORY New entity in IFC
| 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.