Extension 
url 
value[x] Documentation for this formatThis is the set of resources that conform to either of the profiles effectivePeriod (http://ehealth.sundhed.dk/fhir/StructureDefinition/ehealth-effectivePeriod) and effectivePeriod (http://ehealth.sundhed.dk/fhir/StructureDefinition/ehealth-effectivePeriod). 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..* | Clinically relevant time-period for questionnaire response. | ||
| url | 1..1 | uri | identifies the meaning of the extension | |
| value[x] | 1..1 | Period | Value of extension | |
| Documentation for this format | ||||