| Source Element | Usage | Target |
|---|---|---|
| Age.id | UseElementSameName | Age.id |
| Age.extension | UseElementSameName | Age.extension |
| Age.value | UseElementSameName | Age.value |
| Age.comparator | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-Age.comparator |
| Age.unit | UseElementSameName | Age.unit |
| Age.system | UseElementSameName | Age.system |
| Age.code | UseElementSameName | Age.code |