B.API-BOI Register

How numbers are allotted and kept

• The code after BOI names the issuing agency. BAPI is the registrar and the first agency; another institution, journal or body may subscribe to BOI and issue numbers under its own code, recorded in this register.
• A number is allotted automatically when a publication goes live with its full publication date. Nobody types it in.
• If the kind of a publication is changed in the admin panel, the sub-type code follows; the year, month and serial stay, and the earlier form still opens the record.
• Each year has one running series for all publication types, starting at 00010 and rising by one (00010, 00011, 00012).
• The year, month and serial never change. If an online publication is later printed, O becomes OP and the earlier form still opens the same record.
• A revised and updated publication keeps its number and adds the version (v2, v3).
• A withdrawn, archived or retracted publication keeps its number, shown with its status. A number is never given to another work.
• The check character at the end lets anyone confirm that a number has been copied correctly.