This enumeration defines the basic types for opening elements.
An opening as subtraction feature that cuts through the element it voids. It thereby creates a hole. An opening in addition has a particular meaning for either providing a void for doors or windows, or an opening to permit flow of air and passing of light.
An opening as subtraction feature that does not cut through the element it voids. It creates a niche or similar voiding pattern.
User-defined opening element.
Undefined opening element.
TYPE IfcOpeningElementTypeEnum = ENUMERATION OF