PDBx/mmCIF
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Data Item _reflns.R_free_details

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General

Item name
_reflns.R_free_details
Category name
reflns
Attribute name
R_free_details
Required in PDB entries
no
Used in current PDB entries
Yes, in about 0.003 % of entries

Item Description

A description of the method by which a subset of reflections was selected for exclusion from refinement so as to be used in the calculation of a 'free' R factor.

Item Example

View/hide Example 
                                  The data set was sorted with l varying most
                                  rapidly and h varying least rapidly. Every
                                  10th reflection in this sorted list was
                                  excluded from refinement and included in the
                                  calculation of a 'free' R factor.

Data Type

Data type code
text
Data type detail
text item types / multi-line text ...
Primitive data type code
char
Regular expression
[][ \n\t()_,.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*