Namespace Xbim.Ifc4.TopologyResource Classes IfcAdvancedFace IfcClosedShell IfcConnectedFaceSet IfcEdge IfcEdgeCurve IfcEdgeLoop IfcFace IfcFaceBound IfcFaceOuterBound IfcFaceSurface IfcLoop IfcOpenShell IfcOrientedEdge IfcPath IfcPolyLoop IfcSubedge IfcTopologicalRepresentationItem IfcVertex IfcVertexLoop IfcVertexPoint Interfaces IfcShell Enums IfcAdvancedFace.IfcAdvancedFaceClause IfcEdgeLoop.IfcEdgeLoopClause IfcFace.IfcFaceClause IfcOrientedEdge.IfcOrientedEdgeClause IfcPath.IfcPathClause IfcPolyLoop.IfcPolyLoopClause