.. _exhale_define__ifc4x3__rc1-definitions_8h_1ac7396b57a27f239dcafb5a20b39637bd:

Define SCHEMA_IfcBuildingSystem_LongName_IS_OPTIONAL
====================================================

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


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


.. doxygendefine:: SCHEMA_IfcBuildingSystem_LongName_IS_OPTIONAL