| Allowed Value | Details | 
|---|---|
| - | systematically absent reflection | 
| < |                                      satisfies _refine.ls_d_res_high, satisfies _refine.ls_d_res_low, unobserved by _reflns.observed_criterion, not flagged as systematically absent, not flagged as unreliable  | 
| f |                                      satisfies _refine.ls_d_res_high, satisfies _refine.ls_d_res_low, observed by _reflns.observed_criterion, not flagged as systematically absent, not flagged as unreliable, excluded from refinement so as to be included in the calculation of a 'free' R factor  | 
| h | does not satisfy _refine.ls_d_res_high | 
| l | does not satisfy _refine.ls_d_res_low | 
| o |                                      satisfies _refine.ls_d_res_high, satisfies _refine.ls_d_res_low, observed by _reflns.observed_criterion, not flagged as systematically absent, not flagged as unreliable  | 
| x | unreliable measurement -- not used | 
| Allowed Value | Details | 
|---|---|
| - | systematically absent reflection | 
| < |                                      satisfies _refine.ls_d_res_high, satisfies _refine.ls_d_res_low, unobserved by _reflns.observed_criterion, not flagged as systematically absent, not flagged as unreliable  | 
| f |                                      satisfies _refine.ls_d_res_high, satisfies _refine.ls_d_res_low, observed by _reflns.observed_criterion, not flagged as systematically absent, not flagged as unreliable, excluded from refinement so as to be included in the calculation of a 'free' R factor  | 
| h | does not satisfy _refine.ls_d_res_high | 
| l | does not satisfy _refine.ls_d_res_low | 
| o |                                      satisfies _refine.ls_d_res_high, satisfies _refine.ls_d_res_low, observed by _reflns.observed_criterion, not flagged as systematically absent, not flagged as unreliable  | 
| x | unreliable measurement -- not used |