.. _exhale_define__ifc4x3__rc1-definitions_8h_1a4aeefc1cd798cb5bb6f6d1a463ae9d49:

Define SCHEMA_IfcOwnerHistory_ChangeAction_IS_OPTIONAL
======================================================

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


Define Documentation
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.. doxygendefine:: SCHEMA_IfcOwnerHistory_ChangeAction_IS_OPTIONAL