Extension 
url 
value[x] 
valueUri
valueCanonical Documentation for this formatThis is the set of resources that conform to either of the profiles Max value set (http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet) and Max value set (http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet). 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..1 | Maximum Value Set (when strength = extensible) | ||
| url | 1..1 | uri | identifies the meaning of the extension | |
| value[x] | 1..1 | Value of extension | ||
| valueUri | uri | |||
| valueCanonical | canonical(ValueSet) | |||
| Documentation for this format | ||||