string 
extension 
value Max Length:1048576
Documentation for this formatThis is the set of resources that conform to either of the profiles CDS Hooks Service Response If-None-Exist Extension (http://hl7.org/fhir/us/davinci-crd/StructureDefinition/CDSHookServiceResponseExtensionIfNoneExist) and CDS Hooks Service Response If-None-Exist Extension (http://hl7.org/fhir/us/davinci-crd/StructureDefinition/CDSHookServiceResponseExtensionIfNoneExist). E.g. what you have to deal with if you get resources conforming to one of them
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| string | 0..1 | if-none-exist header value | ||
| extension | 0..* | Extension | Additional content defined by implementations | |
| value | 0..1 | string | Primitive value for string Max Length:1048576 | |
| Documentation for this format | ||||