Lift
From Senfi Docs
Lift represents a physical lift in the real world. Lift is a specialized sensor in Senfi and may contain one or more measurements.

Lift in 3D model represents by lift shaft and lift car
Lobby
Lobby represents the lift lobby in the real world. Lobby may contain one or more lifts.
Stop
Stops are levels that the lift can travel. Stops starts from 1 and begins from the lowest to the highest serving level.
Unlike other sensors, lift is attached to building instead of level. Lifts are associated with lobby and lift's stops may within one or more blocks of the same building.

Lift relation with BBL