Data Item _pdbx_data_usage.url
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General 
- Item name
- _pdbx_data_usage.url
- Category name
- pdbx_data_usage
- Attribute name
- url
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
Provides the an optional url for more details of the
particular type.
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [][_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*