IFC 4.3.0.1 (IFC4X3_TC1)

# 5.4.3.53 IfcRelFillsElement

## 5.4.3.53.1 Semantic definition

IfcRelFillsElement is an objectified relationship between an opening element and an element that fills (or partially fills) the opening element. It is an one-to-one relationship.

As shown in Figure 5.4.3.53.A, 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 <-- IfcRelVoidsElement --> IfcOpeningElement, then the door is inserted within the opening by IfcOpeningElement <-- IfcRelFillsElement --> IfcDoor.

## 5.4.3.53.5 Formal representation

ENTITY IfcRelFillsElement
SUBTYPE OF (IfcRelConnects);
RelatingOpeningElement : IfcOpeningElement;
RelatedBuildingElement : IfcElement;
END_ENTITY;