Xbim.Ifc4 (nuget): Provides support for the IFC4 schema, including Add1, Add2 + Alignment schemas.
Keywords: BIM|IFC|IfcXml|IfcZip|Ifc4|COBie|BuildingSmart|bim|cobie|express|ifc|ifc2x3|ifc4|iso16739|openbim|step21