| Value | Category |
|---|---|
| -666 | |
| 1 | Official teaching related duty |
| 2 | Official non-teaching duty |
| 3 | Assigned elsewhere/transferred |
| 4 | Sick |
| 5 | Works in a different shift |
| 6 | Authorized leave |
| 7 | Expected to arrive later/Not arrived yet |
| 8 | Left early |
| 9 | Don't know |
| 10 | Unauthorized absence |
| 11 | Suspended |
| 12 | Other |
| Sysmiss |