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ISBN (International Standard Book Number) - Markdown

ISBN (International Standard Book Number) is an international standard numbering system for uniquely identifying books and similar publications. Standardized as ISO 2108, ISBN-13 with 13 digits has been the standard since 2007. It identifies the publisher, title, edition, and format, and is used worldwide as an essential identifier for book distribution and inventory management.

ISBN International Standard Book Number book identification publishing barcode ISO 2108

| code | slug | name | description | digits | prefix | structure | algorithm | examples |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| ISBN-13 | isbn-13 | ISBN-13 (13-digit version) | The standard format since 2007, consisting of 13 digits. | 13 | ["978","979"] | Prefix (3 digits) + Registration group (1-5 digits) + Registrant (2-7 digits) + Publication (1-6 digits) + Check digit (1 digit) |  |  |
| ISBN-10 | isbn-10 | ISBN-10 (10-digit version - legacy format) | Legacy format used until 2006, consisting of 10 digits. | 10 |  | Registration group (1-5 digits) + Registrant (2-7 digits) + Publication (1-6 digits) + Check digit (1 digit: 0-9 or X) |  |  |
| CHECK-DIGIT-MOD10 | check-digit-mod10 | Check Digit (for ISBN-13) | The Modulus 10 (Mod 10) check digit used for ISBN-13 validation. |  |  |  | Modulus 10 (Mod 10): Sum of (odd positions × 1) + (even positions × 3), subtract remainder from 10 |  |
| CHECK-DIGIT-MOD11 | check-digit-mod11 | Check Digit (for ISBN-10) | The Modulus 11 (Mod 11) check digit used for ISBN-10 validation. |  |  |  | Modulus 11 (Mod 11): Multiply by weights 10, 9, 8... sum and subtract remainder from 11 (10=X, 11=0) |  |
| PREFIX-978 | prefix-978 | Prefix 978 | The standard prefix used in ISBN-13. |  | 978 |  |  |  |
| PREFIX-979 | prefix-979 | Prefix 979 | The additional prefix used in ISBN-13. |  | 979 |  |  |  |
| REGISTRATION-GROUP | registration-group | Registration Group | The element in an ISBN that identifies the country, region, or language area. |  |  |  |  | [{"code":"0","region":"English-speaking area"},{"code":"1","region":"English-speaking area"},{"code":"4","region":"Japan"},{"code":"3","region":"German-speaking area"},{"code":"2","region":"French-speaking area"}] |
| BOOK-BARCODE | book-barcode | Book JAN Code (ISBN Barcode) | The barcode for books created based on ISBN. |  |  |  |  |  |