A card used to represent a specific model car on a layout. It will have at least a basic description of the car such as type and color as well as reporting marks and number to identify it. The carcard information is "permanent," ie. does not change regardless of what the car is currently doing.
A card used with the carcard (above) to indicate the destination, routing and other information about the specific shipment the car is currently being used for. Usually the waybill card is a separate item smaller than the carcard such that it can be clipped to or (more commonly) slipped into the pocket of the carcard leaving the car identification information showing. The waybill may show information about 1, 2, 3, or 4 (sometimes more) movements depending on which side of the waybill is turned up.
The actual "owner" of the card can be either a consist or a location.
This already exists in Rocrail: Locomotive Table.
Every operator get a train/consist, by extended LocControlDialog. (Operator ↔ TrainID)
The dialog contains:
¹) At least the waybill table must be shared by all Rocrail servers.
If every Yard or station is controlled by its own Rocrail server it needs a networking functionality to run trains from station to station in automatic mode.
A first idea is found at the developer white board: Networking Rocrail Servers