-readout from compact format (TJ)
-segmentation type determines the name of bins
  -i.e. "theta", "phi"
-need flag for "signed" for compact format
-signed
  -most significant bit is the sign bit
-projective
  -global, but not necessary (WL)
  -local projective does "make sense"
-specific bin names
  -"global_projective_cylinder"
-where is system, barrel?
  -system="2"
-fast sim
  -needs to know hcal, ecal, muon
  -...but not tracker (any non-cal)
-tracker
  -discs rather than endcaps
-need shape element in compact (WL, JM)
-mother volume problemmatic when doing supports
-go over assumptions (WL)
-layer concept part of ID calc (WL)
-drivers for writing different