Section 4.7.2 Number of Terminals for ConductingEquipment objects in IEC 61970-301 appears to be incomplete.
Section text: "The following ConductingEquipment classes have two terminals: ACLineSegment, DCLineSegment, Jumper, Fuse, Breaker, Disconnector, LoadBreakSwitch, SeriesCompensator. All other ConductingEquipment leaf classes have a single terminal."
It seems like the list of conducting equipment objects that have two terminals is incomplete. For example, I expected that all classes derived from Switch would have two terminals. If a switch does not have two terminals how does it affect the network connectivity?