Data Item _reflns.number_obs
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General 
- Item name
- _reflns.number_obs
- Category name
- reflns
- Attribute name
- number_obs
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 82.3 % of entries
Item Description
The number of reflections in the REFLN list (not the DIFFRN_REFLN
list) classified as observed (see _reflns.observed_criterion).
This number may contain Friedel-equivalent reflections according
to the nature of the structure and the procedures used.
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 | +∞ |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _reflns_number_observed | cif_core.dic | 2.0.1 |