| http://midata.coop | MIDATA Code (where no other Coding like LOINC is available) | body/weight |
| http://midata.coop/codesystems/content | MIDATA Content-Type (exists for each record) | body/weight |
| http://midata.coop/codesystems/group | MIDATA “Group” in Record-Tree | health |
| http://midata.coop/codesystems/format | MIDATA Format Type | fhir/Observation |
| http://midata.coop/codesystems/consent-category | Category for consent | anything |
| http://midata.coop/codesystems/consent-type | Type of consent | CIRCLE |
| http://midata.coop/codesystems/app | Internal name of app | mimoti |
| http://midata.coop/codesystems/audit-events | MIDATA codes for audit events | user-registration |
| http://midata.coop/codesystems/user-role | MIDATA user role | MEMBER |
| http://midata.coop/codesystems/study-code | Code identifying a study | ABCD-1234 |
| http://midata.coop/codesystems/security | MIDATA specific security codes | public |