Data Item _space_group.IT_number
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General 
- Item name
- _space_group.IT_number
- Category name
- space_group
- Attribute name
- IT_number
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 7.0 % of entries
Item Description
The number as assigned in International Tables for
Crystallography Vol A, specifying the proper affine class (i.e.
the orientation preserving affine class) of space groups
(crystallographic space group type) to which the space group
belongs. This number defines the space group type but not
the coordinate system in which it is expressed.
Data Type 
- Data type code
- numb
- 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 |
|---|---|
| 1 | 230 |
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _symmetry_Int_Tables_number | cif_core.dic | 1.0 |