.. _exhale_define__ifc4x3__rc1-definitions_8h_1ac9e92e08cd5476a7bc61596a368452c7:

Define SCHEMA_IfcReference_InstanceName_IS_OPTIONAL
===================================================

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


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


.. doxygendefine:: SCHEMA_IfcReference_InstanceName_IS_OPTIONAL