| LS | Title | From | To | Approval date |
| SG20-LS78 | LS/r on comments on the term “knowledge service” and its definition developed by ITU-T Study Group 2 (reply to SCV-LS43) | SG20 | SCV; | 2025-09-25 |
| SCV-LS43 | LS on comments on the term “knowledge service” and its definition developed by ITU-T Study Group 2 | SCV | SG2; SG20; | 2025-08-05 |