description: Information on changes made to the Value Set Definition over time, and also has a contained audit trail of all such changes.
package_name: hl7.fhir.core
derivation: constraint
name: What has happened over time
type: null
elements:
  extension:
    isModifier: false
    short: The name of this set of history entries
    index: 0
    name: name
    comments: Typically, a value set will have a set of history entries for each major publication milestone.
    type: Extension
    elements:
      extension:
        isModifier: false
        short: Date the change was made
        index: 7
        name: date
        type: Extension
        elements:
          extension: {name: extension, index: 26}
          url:
            type: uri
            pattern: {type: Uri, value: notes}
            index: 27
          value:
            choices: [valueString]
            index: 29
          valueDateTime: {type: dateTime, choiceOf: value, index: 12}
          valueString: {type: string, choiceOf: value, index: 30}
        extensions: {}
        required: [valueString, valueDateTime, value]
      url:
        type: uri
        pattern: {type: Uri, value: revision}
        index: 31
      value:
        choices: []
        index: 33
      valueString: {type: string, choiceOf: value, index: 5}
    extensions: {}
    required: [valueString, extension, value]
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-history'}
    index: 34
  value:
    choices: []
    index: 36
package_version: 1.4.0
extensions: {}
class: datatype
kind: datatype
url: http://hl7.org/fhir/StructureDefinition/codesystem-history
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null