.. _exhale_define__ifc4x2-definitions_8h_1aedfcad2f33855bb948d236bd5c0a57df:

Define SCHEMA_IfcMaterialRelationship_Expression_IS_OPTIONAL
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- Defined in :ref:`file_src_ifcparse_Ifc4x2-definitions.h`


Define Documentation
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.. doxygendefine:: SCHEMA_IfcMaterialRelationship_Expression_IS_OPTIONAL