Data Item _ihm_external_reference_info.reference_type
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General 
- Item name
- _ihm_external_reference_info.reference_type
- Category name
- ihm_external_reference_info
- Attribute name
- reference_type
- Required in PDB entries
- yes
- Used in current PDB entries
- No
Item Description
The type of external reference.
Currently, only Digital Object Identifiers (DOIs) and supplementary files
stored locally are supported.
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|^-]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| DOI | External reference is a Digital Object Identifier |
| Supplementary Files | External reference includes supplementary files stored locally |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| DOI | External reference is a Digital Object Identifier |
| Supplementary Files | External reference includes supplementary files stored locally |