Data Item _coupling_constant.val_err
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General 
- Item name
- _coupling_constant.val_err
- Category name
- coupling_constant
- Attribute name
- val_err
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
Estimated or measured error in the scalar coupling constant value.
Data Type 
- Data type code
- float
- Data type detail
- int item types are the subset of numbers that are the floating numbers.
- Primitive data type code
- numb
- Regular expression
- -?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?