| Date       | Change                                                                                                                                                                   |
|------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 14/02/2023 | Original Draft                                                                                                                                                           |
| 20/02/2023 | Added Service Diagnostic API documents                                                                                                                                   |
| 15/03/2023 | Added the requestServiceDiagnostics route and responses                                                                                                                  |
| 02/02/2024 | Added the XSD schema download button                                                                                                                                     |
| 05/02/2024 | Added currentCFMStatus field to the XSD schema                                                                                                                           |
| 12/02/2024 | Updated the servicePathUsage field in the XSD schema                                                                                                                     |
| 15/02/2024 | Added the Service Diagnostic API diagram                                                                                                                                 |
| 16/02/2024 | Fixed the buyerIdentifier field in the XSD schema                                                                                                                        |
| 08/03/2024 | Added the explanations for ONT Status and CFM Status values                                                                                                              |
| 03/04/2024 | Added the node utilisation for Local and National Configurations                                                                                                         |
| 11/04/2024 | Added currentUniportStatus field to the XSD schema                                                                                                                       |
| 18/04/2024 | Added the explanations for UniPort Status values                                                                                                                         |
| 17/05/2024 | Added the Revision History document                                                                                                                                      |
| 25/07/2024 | Removed incidents from currentStatus                                                                                                                                     |
| 16/09/2024 | Added NBA (Next Best Action) codes to XSD and the explanations for them                                                                                                  |