.. _exhale_define__ifc4x1-definitions_8h_1af747e9ecddcbfe02b244c256a0f24b31:

Define SCHEMA_IfcBuildingSystem_PredefinedType_IS_OPTIONAL
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- Defined in :ref:`file_src_ifcparse_Ifc4x1-definitions.h`


Define Documentation
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.. doxygendefine:: SCHEMA_IfcBuildingSystem_PredefinedType_IS_OPTIONAL