8.6.2.1 IfcClassificationReferenceSelect
8.6.2.1.1 Semantic definition
The IfcClassificationReferenceSelect enables selection of whether a classification reference is a subset of another classification reference or is a top level entry of a classification source.
8.6.2.1.2 Type values
8.6.2.1.3 Formal representation
TYPE IfcClassificationReferenceSelect = SELECT
(IfcClassification
,IfcClassificationReference);
END_TYPE;