http://hl7.org/fhir/StructureDefinition/elementdefinition-defaulttype|5.2.0

The default type that applies if the instance doesn't specify a particular type, and there is a choice of types. Only for use on logical models.
description: The default type that applies if the instance doesn't specify a particular type, and there is a choice of types.  Only for use on logical models.
derivation: constraint
name: DefaultType
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/elementdefinition-defaulttype'}
    index: 1
  value:
    choices: []
    index: 3
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/elementdefinition-defaulttype
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 5.2.0
required: [value]