8.10.2.4 IfcMaterialSelect
8.10.2.4.1 Semantic definition
IfcMaterialSelect provides selection of either a material definition or a material usage definition that can be assigned to an element, a resource or another entity within this specification.
8.10.2.4.2 Type values
8.10.2.4.3 Formal representation
TYPE IfcMaterialSelect = SELECT
(IfcMaterialDefinition
,IfcMaterialList
,IfcMaterialUsageDefinition);
END_TYPE;