Hello, I imported the SINAPI ifcClassification and the xml to freecad BIM/Classification dir (tested together and separetly) and it seems to be broken, since they only show the number codes (and makes it very difficult to identify the actual material)
I tried from another source and it worked as expected with text descriptions and descriptors.
If there is any other info needed to fix, just ask.
FreeCAD Version: FreeCAD 1.0.0 Revision: 38806 (Git)