.. _exhale_define__ifc4-definitions_8h_1a57b93c542e8ce0ab8a032b31f857619d:

Define SCHEMA_IfcSurfaceStyleRefraction_RefractionIndex_IS_OPTIONAL
===================================================================

- Defined in :ref:`file_src_ifcparse_Ifc4-definitions.h`


Define Documentation
--------------------


.. doxygendefine:: SCHEMA_IfcSurfaceStyleRefraction_RefractionIndex_IS_OPTIONAL