description: A uri that identifies the source for this element.\n\nThis extension functions for an element in the same manner as meta.source functions for an resource.  The source of an element may be finer-grained than the source declared on a resource.  Like meta.source, if more detail is needed, Provenance should be used.
package_name: hl7.fhir.uv.extensions.r4b
derivation: constraint
name: ElementSource
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/elementSource'}
    index: 1
  value:
    choices: [valueUri]
    index: 3
  valueUri: {type: uri, choiceOf: value, index: 4}
package_version: 5.3.0-ballot-tc
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/elementSource
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 5.3.0-ballot-tc
required: [valueUri, value]