8.7.2.5 IfcGridPlacementDirectionSelect
8.7.2.5.1 Semantic definition
IfcGridPlacementDirectionSelect enables the choice of defining a grid placement be either an explicit direction, or by referencing a second grid intersection to provide the direction.
8.7.2.5.2 Type values
8.7.2.5.3 Formal representation
TYPE IfcGridPlacementDirectionSelect = SELECT
(IfcDirection
,IfcVirtualGridIntersection);
END_TYPE;