If you wish to dive deeper into the IFC export, you should take a look at the Revit IFC Export open source project:
https://sourceforge.net/p/ifcexporter/discussion/general
https://github.com/Autodesk/revit-ifc
If you wish to dive deeper into the IFC export, you should take a look at the Revit IFC Export open source project:
https://sourceforge.net/p/ifcexporter/discussion/general
https://github.com/Autodesk/revit-ifc