.. _exhale_define__ifc4x3__rc1-definitions_8h_1a580b8c9f0e534648f0c1dc9afce68b9c:

Define SCHEMA_IfcMaterialConstituentSet_Description_IS_OPTIONAL
===============================================================

- Defined in :ref:`file_src_ifcparse_Ifc4x3_rc1-definitions.h`


Define Documentation
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.. doxygendefine:: SCHEMA_IfcMaterialConstituentSet_Description_IS_OPTIONAL