Namespace Xbim.Ifc2x3.TopologyResource Classes IfcClosedShell IfcConnectedFaceSet IfcEdge IfcEdgeCurve IfcEdgeLoop IfcFace IfcFaceBound IfcFaceOuterBound IfcFaceSurface IfcLoop IfcOpenShell IfcOrientedEdge IfcPath IfcPolyLoop IfcSubedge IfcTopologicalRepresentationItem IfcVertex IfcVertexLoop IfcVertexPoint Interfaces IfcShell Enums IfcEdgeLoop.IfcEdgeLoopClause IfcFace.IfcFaceClause IfcOrientedEdge.IfcOrientedEdgeClause IfcPath.IfcPathClause IfcPolyLoop.IfcPolyLoopClause