Pset_RailwaySignalAspect Properties in this property set are applicable for _IfcSignal_ and _IfcSign_ applied in railways. These properties describe the signal aspect, which is the information on the signal or sign shown to the train driver. IfcSignal IfcSign IfcSignal,IfcSign SignalAspectSymbol Content which is shown on the signal or sign, e.g. text, number, arrow or icon. AppliesToTrainCategory Sign information relative to train category, e.g. freight, passenger. FREIGHT PASSENGER OTHER NOTKNOWN UNSET FREIGHT Freight train or railway line. PASSENGER Passenger train or railway line. OTHER required category not on scale (other) Value is not listed. NOTKNOWN Value is unkown (unknown) Value is unknown. UNSET Value has not been specified (unset) Value has not been specified. SignalAspectType The type of aspect, e.g. 2-display aspect for distant signal, 3-display aspect for block signal. SignLegend Text information written on the signal or sign.