I figured out that the lineID from HAFAS is not unique. For example, there are two RB81's from DB Regio Nordost (Hamburg - Bad Oldesloe and Nordhausen - Bodenfelde) which both have the "great" lineID rb-81 and probably there are more such cases.
I suspect that there is currently no way to distinguish the lines in that case...
I figured out that the lineID from HAFAS is not unique. For example, there are two RB81's from DB Regio Nordost (Hamburg - Bad Oldesloe and Nordhausen - Bodenfelde) which both have the "great" lineID
rb-81
and probably there are more such cases.I suspect that there is currently no way to distinguish the lines in that case...