Data Item _struct_ref_seq_dif.rcsb_ordinal
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General 
- Item name
- _struct_ref_seq_dif.rcsb_ordinal
- Category name
- struct_ref_seq_dif
- Attribute name
- rcsb_ordinal
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
A synthetic integer primary key for this category.
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]+