Does these attributes are defined by buildingSMART or not?

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Here is a fragment of Material Properties as exported from ARCHICAD into IFC4, with the translator set to export Material Properties

#228= IFCMATERIAL('Reinforced Concrete - Structural',$,$);
#235= IFCMATERIALPROPERTIES('Pset_MaterialThermal',$,(#239,#246),#228);
#239= IFCPROPERTYSINGLEVALUE('ThermalConductivity',$,IFCTHERMALCONDUCTIVITYMEASURE(2.5),$);
#246= IFCPROPERTYSINGLEVALUE('SpecificHeatCapacity',$,IFCSPECIFICHEATCAPACITYMEASURE(1000.),$);
#247= IFCMATERIALPROPERTIES('Pset_MaterialCommon',$,(#249),#228);
#249= IFCPROPERTYSINGLEVALUE('MassDensity',$,IFCMASSDENSITYMEASURE(2400.),$);
#250= IFCMATERIALPROPERTIES('AC_Pset_MaterialCustom',$,(#252,#253,#254,#255,#256,#257,#258,#259,#260),#228);
#252= IFCPROPERTYSINGLEVALUE('Embodied Energy',$,IFCTEXT('2.33 (MJ/kg)'),$);
#253= IFCPROPERTYSINGLEVALUE('Embodied Carbon',$,IFCTEXT('0.242 (kgCO\X2\2082\X0\/kg)'),$);
#254= IFCPROPERTYSINGLEVALUE('ID',$,IFCTEXT('ST-06'),$);
#255= IFCPROPERTYSINGLEVALUE('Description',$,IFCTEXT('Description'),$);
#256= IFCPROPERTYSINGLEVALUE('Manufacturer',$,IFCTEXT('Manufacturer'),$);
#257= IFCPROPERTYSINGLEVALUE('Participates in Collision Detection',$,IFCBOOLEAN(.T.),$);
#258= IFCPROPERTYSINGLEVALUE('Name',$,IFCLABEL('My Name'),$);
#259= IFCPROPERTYSINGLEVALUE('Category',$,IFCLABEL('My Category'),$);
#260= IFCPROPERTYSINGLEVALUE('Description',$,IFCLABEL('My Description'),$);

AC23_concretemorph_IFC4Materials.ifc (8.7 KB)