| Modalita' | Descrizione | Codice aggregazione | Note |
| 00 | No formal educatio or below ISCED 1 | ||
| 11 | ISCED 1 | ||
| 21 | ISCED 2 | ||
| 22 | ISCED 3c (shorter than two years) | ||
| 30 | ISCED 3 (without distinction a, b or c possible, 2 y+) | ||
| 31 | ISCED 3c (two years and more) | ||
| 32 | ISCED 3a, b | ||
| 41 | ISCED 4a, b | ||
| 42 | ISCED 4c | ||
| 43 | ISCED 4 (without distinction a, b or c possible) | ||
| 51 | ISCED 5b | ||
| 52 | ISCED 5a | ||
| 60 | ISCED 6 | ||
| 99 | Not applicable (child less than 15 years) |