[ArcAngel]

Ok, so far as I understand, as of the 2016 season, there are these minor league classifications:

Triple A (AAA) (IL, PCL, LMB)
Double A (AA) (EL, SL, TL)
Single A - Advanced (A+) (some refer to this as High A) (CAL, CAR, FSL)
Single A (A) (MIDW, SAL)
Single A - Short Season (A-) (Low A) (NYPL, NWL)
Rookie - Advanced (R+) (APP, PIO)
Rookie (R) (AZL, GCL)

Now, for the purposes of my understanding, are the seasonal (spring, summer, fall, winter) leagues grouped as the lowest R level, or would they be considered independant?