How to insert data STEP file that could be interpreted as "Metadata" by CAD Assistant ?

Hello,

I'm currently looking for a way to add some data to my STEP export, that could fall under the "Metadata" category of info as displayed by CAD Assistant.
I've tried some descriptive entities from AP 203 at first like PROPERTY_DEFINITION or GENERAL_PROPERTY, as a way to describe a bit more the product :

#100 = PROPERTY_DEFINITION('material_property','Material specification',#30);
#101 = PROPERTY_DEFINITION_REPRESENTATION(#100,#102);
#102 = REPRESENTATION('material_properties',(#103),#104);
#103 = DESCRIPTIVE_REPRESENTATION_ITEM('steel','Material type');
#104 = REPRESENTATION_CONTEXT('','');

#200 = GENERAL_PROPERTY('weight','Mass of the component');
#201 = GENERAL_PROPERTY_ASSOCIATION(#200,#30);
#202 = PROPERTY_DEFINITION_REPRESENTATION(#201,#203);
#203 = REPRESENTATION('weight_value',(#204),#205);
#204 = MEASURE_REPRESENTATION_ITEM('weight_value',15.5,#206);
#205 = REPRESENTATION_CONTEXT('','');
#206 = MASS_UNIT()

I was thinking that it would be displayed under one of the "Properties" and/or in the "Metadata" section displayed in CAD Assistant when a STEP is opened, but to no avail ...

Perhaps it's possible using STEPCAFControl_Writer in combinaison with XCAFDoc_ShapeTool, XCAFDoc_MaterialTool ... and such, but I haven't found the necessary tool for it.

Could anyone provide a minimal sample for OCCT or a STEP that does contains such information in this regard please ?

[Small Edit] : I am using OCCT 7.9
Thanks