.. _exhale_define__ifc4x3__rc1-definitions_8h_1a92b342ec9c15630d930e2d3f51d7a2c7:

Define SCHEMA_IfcMaterialLayer_Category_IS_OPTIONAL
===================================================

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


Define Documentation
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.. doxygendefine:: SCHEMA_IfcMaterialLayer_Category_IS_OPTIONAL