Data Item _pdbx_sifts_xref_db_segments.xref_db
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General 
- Item name
- _pdbx_sifts_xref_db_segments.xref_db
- Category name
- pdbx_sifts_xref_db_segments
- Attribute name
- xref_db
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The name of additional external databases with range level mapping.
Data Type 
- Data type code
- line
- Data type detail
- char item types / multi-word items ...
- Primitive data type code
- char
- Regular expression
- [][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*