Data Item _space_group_symop.operation_xyz


Item name
Category name
Attribute name
Required in PDB entries
Used in current PDB entries
Yes, in about 7.1 % of entries

Item Description

A parsable string giving one of the symmetry operations of the space group in algebraic form. If W is a matrix representation of the rotational part of the symmetry operation defined by the positions and signs of x, y and z, and w is a column of translations defined by the fractions, an equivalent position X' is generated from a given position X by the equation: X' = WX + w (Note: X is used to represent bold_italics_x in International Tables for Crystallography Vol. A, Section 5) When a list of symmetry operations is given, it is assumed that the list contains all the operations of the space group (including the identity operation) as given by the representatives of the general position in International Tables for Crystallography Vol. A.

Item Example


Data Type

Data type code
Data type detail
char item types / multi-word items ...
Primitive data type code
Regular expression
[][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*
Default value


Alias Item Name Dictionary Name Dictionary Version
_symmetry_equiv_pos_as_xyz cif_core.dic 1.0