.. _exhale_define__ifc2x3-definitions_8h_1aa5bbc5cc3cbd57ba49409d33f1d7a9c0:

Define SCHEMA_IfcOpticalMaterialProperties_ThermalIrEmissivityBack_IS_OPTIONAL
==============================================================================

- Defined in :ref:`file_src_ifcparse_Ifc2x3-definitions.h`


Define Documentation
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.. doxygendefine:: SCHEMA_IfcOpticalMaterialProperties_ThermalIrEmissivityBack_IS_OPTIONAL