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

The specific element to use in the referenced profile, identified by the ElementDefinition.id. This is used when a backbone element is being profiled, rather than an established type.
description: The specific element to use in the referenced profile, identified by the ElementDefinition.id. This is used when a backbone element is being profiled, rather than an established type.
derivation: constraint
name: ProfileElement
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/elementdefinition-profile-element'}
    index: 1
  value:
    choices: []
    index: 3
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/elementdefinition-profile-element
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 5.2.0
required: [value]