IfcHopper includes the following third-party components, each under its own licence.

xBIM Essentials (Xbim.Common, Xbim.Ifc, Xbim.Ifc2x3, Xbim.Ifc4, Xbim.Ifc4x3, Xbim.IO.Esent, Xbim.IO.MemoryModel)
  Licence: Common Development and Distribution License 1.0 (CDDL-1.0)
  Source code: https://github.com/xBimTeam/XbimEssentials
  Licence text: https://raw.githubusercontent.com/xBimTeam/XbimEssentials/master/LICENCE.md
  The DLLs are distributed unmodified.

ManagedEsent (Esent.Interop)
  Licence: MIT. Source code: https://github.com/microsoft/ManagedEsent

.NET libraries by Microsoft (Microsoft.Extensions.DependencyInjection, Microsoft.Extensions.DependencyInjection.Abstractions,
Microsoft.Extensions.Logging.Abstractions, Microsoft.Extensions.Options, Microsoft.Extensions.Primitives, Microsoft.Win32.SystemEvents,
System.Collections.Immutable, System.Drawing.Common, System.Formats.Nrbf, System.Private.Windows.Core, System.Private.Windows.GdiPlus,
System.Reflection.Metadata, System.Resources.Extensions)
  Licence: MIT. Source code: https://github.com/dotnet/runtime and https://github.com/dotnet/winforms

IFC 4.3 property and quantity set templates (Annex A), embedded unchanged in IfcHopper.Core.dll
  By buildingSMART International.
  Snapshot: IFC4X3_ADD2_DEV_20260526 (development documentation).
  Source: https://raw.githubusercontent.com/buildingSMART/Standards-builds/41f3439ef11c77e7e159859a9e7c655b256f3a68/IFC/DEV/IFC4_3/HTML/annex-a-psd.zip
  SHA-256: 22B6B5428FEF492F874252F08ABC077357D353143E1C4E53B877234E564FFEC7
  Upstream status and terms: https://github.com/buildingSMART/Standards-builds/blob/41f3439ef11c77e7e159859a9e7c655b256f3a68/README.md
