The way in which view camera lens series are grouped and named by Rodenstock has changed from what had been long standing convention among manufacturers. For many years, they were grouped into series based on their
Angle of Coverage as can be seen in the link.
As an example, the Nikon W-series ranged from 105–360 mm in focal length all with a 69–73° angle of coverage, while the SW-series ranged from 65–150 mm with a 105–106° angle of coverage. Seven different Rodenstock Apo-Sironar-N focal lengths from 100–300 mm all had the same 72° angle of coverage. Schneider Super Angulon series from 47 mm to 210 mm in focal length had a 100–105° angle of coverage.
Normal (N), Standard (S), Wide (W), Super Wide (SW), XL, etc. described the lenses in a series by angle of coverage; not focal length, angle of view, or image circle. Their HR Digaron lenses are grouped into series by Rodenstock according to image circle size. They use the group codes: S for 70–80 mm diameter image circles, W for 90–100 mm, and SW for 120 mm.
I'm fine with that change. What I find unprofessional is Phase One not bothering to clearly define what their "angle of view" specification references regarding image format. It's inevitably confusing trying to determine what their "angle of view" specification means when what they actually specify is angle of coverage without indicating they're doing so.