Namespace Xbim.Ifc4.MaterialResource Classes IfcMaterial IfcMaterialClassificationRelationship IfcMaterialConstituent IfcMaterialConstituentSet IfcMaterialDefinition IfcMaterialLayer IfcMaterialLayerSet IfcMaterialLayerSetUsage IfcMaterialLayerWithOffsets IfcMaterialList IfcMaterialProfile IfcMaterialProfileSet IfcMaterialProfileSetUsage IfcMaterialProfileSetUsageTapering IfcMaterialProfileWithOffsets IfcMaterialProperties IfcMaterialRelationship IfcMaterialUsageDefinition Structs IfcCardinalPointReference Interfaces IfcMaterialSelect Enums IfcCardinalPointReference.IfcCardinalPointReferenceClause IfcMaterialLayer.IfcMaterialLayerClause IfcMaterialProfile.IfcMaterialProfileClause