IfcObject

• IfcActor
• IfcControl
  • IfcActionRequest
  • IfcWorkControl
    • IfcWorkSchedule
• IfcGroup
  • IfcSystem
    • IfcZone
• IfcProcess
  • IfcTask
• IfcProduct
  • IfcAnnotation
  • IfcElement
  • IfcPort
  • IfcSpatialElement
    • IfcSpatialStructureElement
      • IfcBuilding
      • IfcBuildingStorey
      • IfcSite
      • IfcSpace
• IfcResource
  • IfcConstructionResource
    • IfcConstructionProductResource