Core Layer

• IfcKernel
• IfcControlExtension
• IfcProcessExtension
• IfcProductExtension

Interoperability Layer

• IfcSharedBldgElements
• IfcSharedBldgServiceElements
• IfcSharedComponentElements
• IfcSharedFacilitiesElements
• IfcSharedMgmtElements

Domain Layer

• IfcArchitectureDomain
• IfcBuildingControlsDomain
• IfcConstructionMgmtDomain
• IfcElectricalDomain
• IfcFacilitiesMgmtDomain
• IfcHvacDomain
• IfcPlumbingFireProtectionDomain
• IfcStructuralElementsDomain
• IfcStructuralAnalysisDomain