Macromolecular dictionary (mmCIF) version 2.0.09
The lowest value for the interplanar spacings for the reflection data in this shell. This is called the highest resolution. Note that the resolution limits of shells in the items _phasing_MIR_shell.d_res_high and _phasing_MIR_shell.d_res_low are independent of the resolution limits of shells in the items _reflns_shell.d_res_high and _reflns_shell.d_res_low.
Mandatory item: yes
The permitted range is [0.0, infinity)