.. _exhale_define__ifc4x3__rc1-definitions_8h_1aeff52d3eab5b9aff4fd4210b4e04b156:

Define SCHEMA_IfcMaterialLayerSet_Description_IS_OPTIONAL
=========================================================

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


Define Documentation
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.. doxygendefine:: SCHEMA_IfcMaterialLayerSet_Description_IS_OPTIONAL