Data Item _item.mandatory_code
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General 
- Item name
- _item.mandatory_code
- Category name
- item
- Attribute name
- mandatory_code
- Required in PDB entries
- yes
- Used in current PDB entries
- No
Item Description
Signals if the defined item is mandatory for the proper description
of its category.
Data Type 
- Data type code
- code
- Data type detail
- A single word
- Primitive data type code
- char
- Regular expression
- [^\t\n "]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| implicit | required item but may be determined from context |
| implicit-ordinal | required item determined from the row index of the category |
| no | optional item in this category |
| yes | required item in this category |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| implicit | required item but may be determined from context |
| implicit-ordinal | required item determined from the row index of the category |
| no | optional item in this category |
| yes | required item in this category |