| id | No | string | Unique id for inter-element referencing |
| extension | No | Extension[] | Additional content defined by implementations |
| versionId | No | id | Version specific identifier |
| lastUpdated | No | instant | When the resource version last changed |
| source | No | uri | Identifies where the resource comes from |
| profile | No | canonical[] | Profiles this resource claims to conform to |
| security | No | Coding[] | Security Labels applied to this resource |
| tag | No | Coding[] | Tags applied to this resource |
| project | No | uri | The project that contains this resource. |
| author | No | Reference<> | The individual, device or organization who initiated the last change. |
| account | No | Reference<> | Optional account reference that can be used for sub-project compartments. |
| compartment | No | Reference<>[] | The list of compartments containing this resource. This is readonly and is set by the server. |
