Definition from buildingSMART International: This enumeration type is used to distinguish between possible action types at a high level. It can be used for an automated definition of load combinations and for dimensioning. The contained items and their acronyms are adopted from the Eurocode standard.
The IfcActionTypeEnum type is referenced by the entity IfcStructuralLoadGroup which shall normally be of the type LOAD_COMBINATION_GROUP (see also IfcLoadGroupTypeEnum). If an enumeration item is missing for an appropriate definition of a load group, the item USERDEFINED shall be used instead. In this case, a meaning can be given by using the IfcActionSourceTypeEnum.
HISTORY: New type in Release IFC2x Edition 2.