I found "SW-Part Number" property in Name list of Property Tab Builder. So you can set SW-Part Number property in file property dialog.
but unfortunately without result, because SW read some other "SW-Part Number (BOM)" property from configuration property tab.
So then you make drawing with BOM you`ll get
My question is: what is the name of this "SW-Part Number (BOM)" property and why it`s not in Configuration Specific Property tab where it`s possible to set expression to it (based on dimensions of model for example).