Data Item _refine_ls_shell.number_reflns_obs
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General 
- Item name
- _refine_ls_shell.number_reflns_obs
- Category name
- refine_ls_shell
- Attribute name
- number_reflns_obs
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 7.6 % of entries
Item Description
The number of reflections that satisfy the resolution limits
established by _refine_ls_shell.d_res_high and
_refine_ls_shell.d_res_low and the observation criterion
established by _reflns.observed_criterion.
Data Type 
- Data type code
- int
- Data type detail
- int item types are the subset of numbers that are the negative or positive integers.
- Primitive data type code
- numb
- Regular expression
- [+-]?[0-9]+
Allowed Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 0 | +∞ |
Advisory Boundary Conditions
| Minimum Value | Maximum Value |
|---|---|
| 5 | 20000 |