IFC building model
Schema: "IFC4"
Description: "ViewDefinition[DesignTransferView]"
File name: "boolean examples.ifc"
Time stamp: "2022-12-25T17:04:54+02:00"
Preprocessor: "IfcOpenShell v0.7.0-cdde5366"
Originating system: "BlenderBIM 0.0.221127"
Authorization: "Nobody"

Units
  LENGTHUNIT: MILLI METRE
  PLANEANGLEUNIT: degree (conversion based)
  AREAUNIT: MILLI SQUARE_METRE
  VOLUMEUNIT: MILLI CUBIC_METRE

Spatial structure
IFCPROJECT "My Project"
  IFCSITE "My Site"
    IFCBUILDING "My Building"
      IFCBUILDINGSTOREY "My Storey"
        contains 5 elements
          1 x IFCWALL | type IFCWALLTYPE "WAL100" | names: "Wall" | material: layers ("Unknown" 100.) | property sets: EPset_Parametric
          4 x IFCWINDOW | type IFCWINDOWTYPE "WT01" | names: "Window"

Types
  IFCWALLTYPE "WAL100" | 1 occurrence | material: layers ("Unknown" 100.)
  IFCWINDOWTYPE "WT01" | 4 occurrences

Property sets
  EPset_Parametric | properties | on 1 object (1 IFCWALL)
    Engine = "BlenderBIM.DumbLayer2" (IFCLABEL)