Data Item _em_software.reference_DOI
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General 
- Item name
- _em_software.reference_DOI
- Category name
- em_software
- Attribute name
- reference_DOI
- Required in PDB entries
- no
- Used in current PDB entries
- No
Item Description
Document Object Identifier used by doi.org to uniquely
identify software being used.
Item Example
10.2345/S1384107697000225
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*|+-]*