Each PROFESSIONAL REGISTRATION
| K | must be a registration held by one and only one PERSON |
| K | must be a registration held by one and only one REGISTER |
| may be a registration with one or more PROFESSIONAL REGISTRATION TYPE HELD |
Classes
| K | must be a registration held by one and only one PERSON |
| K | must be a registration held by one and only one REGISTER |
| may be a registration with one or more PROFESSIONAL REGISTRATION TYPE HELD |