Rooted entities

• IfcObjectDefinition
  • IfcObject
    • IfcProduct
      • IfcElement
        • IfcBuildingElement
          • IfcBeam
          • IfcColumn
          • IfcCovering
          • IfcMember
          • IfcPlate
          • IfcRailing
          • IfcStair
          • IfcStairFlight
        • IfcElementAssembly
        • IfcElementComponent
          • IfcDiscreteAccessory
          • IfcFastener
            • IfcMechanicalFastener
        • IfcFeatureElement
          • IfcFeatureElementSubtraction
            • IfcOpeningElement
      • IfcGrid
      • IfcSpatialStructureElement
        • IfcBuilding
        • IfcBuildingStorey
        • IfcSite
    • IfcProject
• IfcPropertyDefinition
  • IfcPropertySetDefinition
    • IfcElementQuantity
    • IfcPropertySet
• IfcRelationship
  • IfcRelAssociates
    • IfcRelAssociatesMaterial
  • IfcRelConnects
    • IfcRelConnectsElements
      • IfcRelConnectsWithRealizingElements
    • IfcRelContainedInSpatialStructure
    • IfcRelVoidsElement
  • IfcRelDecomposes
    • IfcRelAggregates
  • IfcRelDefines
    • IfcRelDefinesByProperties

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