Data Item _database_PDB_rev.num
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General 
- Item name
- _database_PDB_rev.num
- Category name
- database_PDB_rev
- Attribute name
- num
- Required in PDB entries
- yes
- Used in current PDB entries
- Yes, in about 100.0 % of entries
Item Description
The value of _database_PDB_rev.num must uniquely and
sequentially identify a record in the DATABASE_PDB_REV list.
Note that this item must be a number and that modification
numbers are assigned in increasing numerical order.
Data Type 
- Data type code
- int
- Data type detail
- int item types are the subset of numbers that are the negative or positive integers.
- Primitive data type code
- numb
- Regular expression
- [+-]?[0-9]+
