.. _exhale_define__ifc4x3__rc1-definitions_8h_1a67a7e1d4dc7ad2163d026ce77ffee2d8:

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


Define Documentation
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.. doxygendefine:: SCHEMA_IfcMaterial_Description_IS_OPTIONAL