Extension 
extension 
url 
value[x] Documentation for this formatThis is the set of resources that conform to either of the profiles Obervation link period (http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-observationLinkPeriod) and Obervation link period (http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-observationLinkPeriod). 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 | Relevant time to pre-pop observation | ||
| extension | 0..* | Extension | left: Additional content defined by implementations; right: Extension | |
| url | 1..1 | uri | identifies the meaning of the extension | |
| value[x] | 0..1 | Duration | Value of extension | |
| Documentation for this format | ||||