General 
- Item name
- _ndb_connect.date
- Category name
- ndb_connect
- Attribute name
- date
- Required in PDB entries
- no
- Used in current PDB entries
- No
Item Description 
Data Type 
- Data type code
- yyyy-mm-dd
- Data type detail
-
Standard format for CIF dates.
- Primitive data type code
- char
- Regular expression
- [0-9]?[0-9]?[0-9][0-9]-[0-9]?[0-9]-[0-9][0-9]