Table 2: Hierarchical Structure of ISCO88 (COM)
| Major group | Sub-major group | Minor group | Unit group | Group title |
| 2 | Professionals | |||
| 22 | Life science and health professionals | |||
| 222 | Health professionals (except nursing) | |||
| 2222 | Dentists |
| Major group | Sub-major group | Minor group | Unit group | Group title |
| 2 | Professionals | |||
| 22 | Life science and health professionals | |||
| 222 | Health professionals (except nursing) | |||
| 2222 | Dentists |