Data Item _ihm_dataset_external_reference.file_id
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General 
- Item name
- _ihm_dataset_external_reference.file_id
- Category name
- ihm_dataset_external_reference
- Attribute name
- file_id
- Required in PDB entries
- yes
- Used in currrent PDB entries
- No
Item Description
The file id corresponding to this external data file.
This data item is a pointer to _ihm_external_files.id
in the IHM_EXTERNAL_FILES 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]+
