The "VehcileTypeEnum" enumeration type for vehicle classifications seems to be inconsistent.
We may have cars and cars with trailer, in the same way we may have lorries and lorries with trailers.
To make the first distinction I would use unique values: "car" and "carWithTrailer".
In the second case I would have to set the "vehicleType" attribute to "lorry" in both cases, plus have to add a second instance of "vehicleType" set to "vehicleWithTrailer" in one case, since a unique value "lorryWithTrailer" does not exist.
This does not seem logical to me!
Vehicle classifications overhauled in CEN committee comment resolution.