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.r2b.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
    mustSupport: false
    elements:
      extension:
        isModifier: false
        short: Date the change was made
        index: 7
        name: date
        type: Extension
        mustSupport: false
        elements:
          extension:
            isModifier: false
            name: extension
            mustSupport: false
            maxLength: 0
            base: {max: '0', min: 0, path: Extension.extension.extension.extension}
            isSummary: false
            index: 26
          url:
            isModifier: false
            pattern: {type: Uri, value: notes}
            type: uri
            mustSupport: false
            maxLength: 0
            base: {max: '1', min: 0, path: Extension.extension.extension.url}
            isSummary: false
            index: 27
          value:
            base: {max: '1', min: 0, path: 'Extension.extension.extension.value[x]'}
            isSummary: false
            maxLength: 0
            isModifier: false
            mustSupport: false
            choices: [valueString]
            index: 29
          valueDateTime:
            isModifier: false
            index: 12
            type: dateTime
            mustSupport: false
            maxLength: 0
            base: {max: '1', min: 0, path: 'Extension.extension.extension.value[x]'}
            choiceOf: value
            isSummary: false
          valueString:
            isModifier: false
            index: 30
            type: string
            mustSupport: false
            maxLength: 0
            base: {max: '1', min: 0, path: 'Extension.extension.extension.value[x]'}
            choiceOf: value
            isSummary: false
        extensions: {}
        maxLength: 0
        base: {max: '1', min: 0, path: Extension.extension.extension}
        required: [valueString, valueDateTime, value]
        isSummary: false
      url:
        isModifier: false
        pattern: {type: Uri, value: revision}
        type: uri
        mustSupport: false
        maxLength: 0
        base: {max: '1', min: 0, path: Extension.extension.url}
        isSummary: false
        index: 31
      value:
        isModifier: false
        mustSupport: false
        choices: []
        maxLength: 0
        base: {max: '0', min: 0, path: 'Extension.extension.value[x]'}
        isSummary: false
        index: 33
      valueString:
        isModifier: false
        index: 5
        type: string
        mustSupport: false
        maxLength: 0
        base: {max: '1', min: 0, path: 'Extension.extension.value[x]'}
        choiceOf: value
        isSummary: false
    extensions: {}
    maxLength: 0
    base: {max: '1', min: 0, path: Extension.extension}
    required: [valueString, extension, value]
    isSummary: false
  url:
    isModifier: false
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-history'}
    type: uri
    mustSupport: false
    maxLength: 0
    base: {max: '1', min: 0, path: Extension.url}
    isSummary: false
    index: 34
  value:
    isModifier: false
    mustSupport: false
    choices: []
    maxLength: 0
    base: {max: '0', min: 0, path: 'Extension.value[x]'}
    isSummary: false
    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