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To see all available qualifiers, see our documentation.
Spec: http://www.buildingsmart-tech.org/specifications/ifc-releases/ifc2x3-tc1-release/summary
and http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/index.htm
IFC-Lib with 2.3-support: https://github.com/IfcOpenShell/IfcOpenShell