About model and data exchange with 3rd party solutions: Revit, Solibri, dRofus, Bluebeam, structural analysis solutions, and IFC, BCF and DXF/DWG-based exchange, etc.
I read IFC2x Reference Guide again and again. It says: "The IFC properties are saved in an XML file which can be found by default in the XML_IFC_WP subdirectory of the ArchiCAD application folder". But I cannot see any file there.