This is the set of resources that conform to either of the profiles Structure Type Characterstics (Constraint Control) (http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics) and Structure Type Characterstics (Constraint Control) (http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics). 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..1 | Characteristic that applies to the type 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] | 1..1 | code | Value of extension Binding: ?? (required) ele-1: All FHIR elements must have a @value or children | |
| Documentation for this format | ||||