IFC building model
Schema: "IFC4"
Description: "ViewDefinition[DesignTransferView]"
File name: "roundtrip.ifc"
Time stamp: "2022-03-04T20:59:37+01:00"
Preprocessor: "IfcOpenShell v0.7.0-4c40fc16"
Originating system: "BlenderBIM 0.0.220130"
Authorization: "Nobody"

Units
  AREAUNIT: SQUARE_METRE
  VOLUMEUNIT: CUBIC_METRE
  LENGTHUNIT: METRE

Spatial structure
IFCPROJECT "My Project"
  IFCSITE "My Site"
    IFCBUILDING "My Building"
      IFCBUILDINGSTOREY "My Storey"
        contains 6 elements
          2 x IFCSLAB | BASESLAB | names: "Plane"
          4 x IFCWALL | ELEMENTEDWALL | names: "Vert"