Data Item _pdbx_nmr_chem_shift_reference.id
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General 
- Item name
- _pdbx_nmr_chem_shift_reference.id
- Category name
- pdbx_nmr_chem_shift_reference
- Attribute name
- id
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
An integer value that uniquely identifies a set of chemical shift
reference values from other sets of chemical shift referencing values.
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]+