0 – Блок ідентифікації
This block contains those numbers that identify the item or the copy recorded in it.
- 001 Holdings Record Identifier
- 004 Related Bibliographic Record Identifier
- 005 Version Identifier
- 035 Other Systems Control Number
- 070 Inventory Number
Occurrence
Fields 001 and 004 are mandatory in every record. Other fields are entered when data is available.