Data Item _chem_shift_ref.rank
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General 
- Item name
- _chem_shift_ref.rank
- Category name
- chem_shift_ref
- Attribute name
- rank
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The rank of the chemical shift reference. A primary reference is the one
used in reporting the data. A secondary reference would be the compound in the
sample or used as an external reference.
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*