Extension ele-1: All FHIR elements must have a @value or children
ext-1: Must have either extensions or value[x], not both
url 
value[x] ele-1: All FHIR elements must have a @value or children
Documentation for this formatThis is the set of resources that conform to either of the profiles Availability Period (http://hl7.org/fhir/us/davinci-drug-formulary/StructureDefinition/usdf-AvailabilityPeriod-extension) and Availability Period (http://hl7.org/fhir/us/davinci-drug-formulary/StructureDefinition/usdf-AvailabilityPeriod-extension). E.g. what you have to deal with if you get resources conforming to one of them
| Name | Flags | Card. | Type | Description & Constraints |
|---|---|---|---|---|
| Extension | 0..* | Availability Period ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both | ||
| url | 1..1 | uri | identifies the meaning of the extension | |
| value[x] | S | 1..1 | Period | Value of extension ele-1: All FHIR elements must have a @value or children |
| Documentation for this format | ||||