I would like to report that it is currently not possible to populate the IfcProject LongName attribute during IFC 4x3 export using the "File-name_Project_IFC_Properties.csv" file.
I kindly request that this functionality be implemented or improved. For example, the IfcProject ObjectType attribute can already be populated using the same CSV file, and extending this capability to the LongName attribute would ensure greater consistency and flexibility in the export process.
Thank you in advance for your attention to this matter.
Mauro