Data Item _refln.pdbx_anom_difference_sigma
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General 
- Item name
- _refln.pdbx_anom_difference_sigma
- Category name
- refln
- Attribute name
- pdbx_anom_difference_sigma
- Required in PDB entries
- no
- Used in current PDB entries
- Yes, in about 0.003 % of entries
Item Description
The the standard deviation of the amplitude difference
of the Friedel pair, D(hkl) = F(hkl) - F(-h-k-l).
Data Type 
- Data type code
- float
- Data type detail
- float 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]+)?