Data Item _pdbx_struct_assembly_gen.oper_expression
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General 
- Item name
- _pdbx_struct_assembly_gen.oper_expression
- Category name
- pdbx_struct_assembly_gen
- Attribute name
- oper_expression
- Required in PDB entries
- yes
- Used in current PDB entries
- Yes, in about 96.2 % of entries
Item Description
Identifies the operation of collection of operations
from category PDBX_STRUCT_OPER_LIST.
Operation expressions may have the forms:
(1) the single operation 1
(1,2,5) the operations 1, 2, 5
(1-4) the operations 1,2,3 and 4
(1,2)(3,4) the combinations of operations
3 and 4 followed by 1 and 2 (i.e.
the cartesian product of parenthetical
groups applied from right to left)
Item Example1
(1)
Item Example2
(1,2,5)
Item Example3
(1-60)
Item Example4
(1-60)(61)
Data Type 
- Data type code
- operation_expression
- Data type detail
- sequence of parenthetical integer ranges and character codes
- Primitive data type code
- char
- Regular expression
- [][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*