The number of reflections that satisfy the resolution limits
established by _refine.ls_d_res_high and _refine.ls_d_res_low.
Additional Descriptive Information for Depositors
The number of all crystallographically unique measured reflections that
satisfy the resolution limits established by the high and low resolution
cut-offs.
This number includes reflections set aside for cross-validation in a
"free" R-factor set.