description: An extension to carry an indicator for the event date of a data change at the source system
package_name: fhir.r4.wales.stu1
derivation: constraint
name: ExtensionDataStandardsWalesCdrSourceTimestamp
type: Extension
elements:
  url:
    pattern: {type: uri, value: 'https://fhir.nhs.wales/StructureDefinition/Extension-DataStandardsWales-CDR-SourceTimestamp'}
    type: uri
    index: 0
  value:
    choices: [valueDateTime]
    index: 2
  valueDateTime: {type: dateTime, choiceOf: value, index: 3}
package_version: 1.1.1
class: extension
kind: complex-type
url: https://fhir.nhs.wales/StructureDefinition/Extension-DataStandardsWales-CDR-SourceTimestamp
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1
required: [value, valueDateTime]