Extension 
extension 
url Documentation for this formatThis is the set of resources that conform to either of the profiles Phase Set (http://hl7.org/fhir/StructureDefinition/observation-geneticsPhaseSet) and Phase Set (http://hl7.org/fhir/StructureDefinition/observation-geneticsPhaseSet). E.g. what you have to deal with if you get resources conforming to one of them
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension | 0..* | Phase set | ||
| extension | 1..* | Extension | Additional content defined by implementations | |
| url | 1..1 | uri | identifies the meaning of the extension | |
| Documentation for this format | ||||