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: Extension
elements:
  extension:
    isModifier: false
    short: The name of this set of history entries
    comments: Typically, a value set will have a set of history entries for each major publication milestone.
    type: Extension
    index: 0
    slicing:
      slices:
        name:
          match: {}
          schema:
            isModifier: false
            short: The name of this set of history entries
            comments: Typically, a value set will have a set of history entries for each major publication milestone.
            type: Extension
            index: 0
            extensions:
              extension: {url: null, max: 0, index: 1}
            elements:
              extension:
                index: 1
                slicing:
                  slices:
                    extension:
                      match: {}
                      schema: {index: 1}
                      max: 0
              url:
                type: uri
                pattern: {type: Uri, value: name}
                index: 2
              value:
                choices: [valueString]
                index: 4
              valueString: {type: string, choiceOf: value, index: 5}
            required: [valueString, value]
        revision:
          match: {}
          schema:
            isModifier: false
            short: Audit of all changes for a history entry
            type: Extension
            array: true
            index: 6
            extensions:
              date:
                isModifier: false
                short: Date the change was made
                index: 7
                type: Extension
                elements:
                  extension:
                    index: 8
                    slicing:
                      slices:
                        extension:
                          match: {}
                          schema: {index: 8}
                          max: 0
                  url:
                    type: uri
                    pattern: {type: Uri, value: date}
                    index: 9
                  value:
                    choices: [valueDateTime]
                    index: 11
                  valueDateTime: {type: dateTime, choiceOf: value, index: 12}
                _required: true
                extensions:
                  extension: {url: null, max: 0, index: 8}
                url: null
                required: [valueDateTime, value]
              id:
                isModifier: false
                short: Version marker after the change was made
                index: 13
                type: Extension
                elements:
                  extension:
                    index: 14
                    slicing:
                      slices:
                        extension:
                          match: {}
                          schema: {index: 14}
                          max: 0
                  url:
                    type: uri
                    pattern: {type: Uri, value: id}
                    index: 15
                  value:
                    choices: [valueString]
                    index: 17
                  valueString: {type: string, choiceOf: value, index: 18}
                _required: true
                extensions:
                  extension: {url: null, max: 0, index: 14}
                url: null
                required: [valueString, value]
              author:
                isModifier: false
                short: Who made the change
                index: 19
                type: Extension
                elements:
                  extension:
                    index: 20
                    slicing:
                      slices:
                        extension:
                          match: {}
                          schema: {index: 20}
                          max: 0
                  url:
                    type: uri
                    pattern: {type: Uri, value: author}
                    index: 21
                  value:
                    choices: [valueString]
                    index: 23
                  valueString: {type: string, choiceOf: value, index: 24}
                _required: true
                extensions:
                  extension: {url: null, max: 0, index: 20}
                url: null
                required: [valueString, value]
              notes:
                url: null
                isModifier: false
                short: Information about the change
                type: Extension
                index: 25
                extensions:
                  extension: {url: null, max: 0, index: 26}
                elements:
                  extension:
                    index: 26
                    slicing:
                      slices:
                        extension:
                          match: {}
                          schema: {index: 26}
                          max: 0
                  url:
                    type: uri
                    pattern: {type: Uri, value: notes}
                    index: 27
                  value:
                    choices: [valueString]
                    index: 29
                  valueString: {type: string, choiceOf: value, index: 30}
                required: [valueString, value]
            elements:
              extension:
                isModifier: false
                short: Date the change was made
                type: Extension
                index: 7
                slicing:
                  slices:
                    date:
                      match: {}
                      schema:
                        isModifier: false
                        short: Date the change was made
                        type: Extension
                        _required: true
                        index: 7
                        extensions:
                          extension: {url: null, max: 0, index: 8}
                        elements:
                          extension:
                            index: 8
                            slicing:
                              slices:
                                extension:
                                  match: {}
                                  schema: {index: 8}
                                  max: 0
                          url:
                            type: uri
                            pattern: {type: Uri, value: date}
                            index: 9
                          value:
                            choices: [valueDateTime]
                            index: 11
                          valueDateTime: {type: dateTime, choiceOf: value, index: 12}
                        required: [valueDateTime, value]
                    id:
                      match: {}
                      schema:
                        isModifier: false
                        short: Version marker after the change was made
                        type: Extension
                        _required: true
                        index: 13
                        extensions:
                          extension: {url: null, max: 0, index: 14}
                        elements:
                          extension:
                            index: 14
                            slicing:
                              slices:
                                extension:
                                  match: {}
                                  schema: {index: 14}
                                  max: 0
                          url:
                            type: uri
                            pattern: {type: Uri, value: id}
                            index: 15
                          value:
                            choices: [valueString]
                            index: 17
                          valueString: {type: string, choiceOf: value, index: 18}
                        required: [valueString, value]
                    author:
                      match: {}
                      schema:
                        isModifier: false
                        short: Who made the change
                        type: Extension
                        _required: true
                        index: 19
                        extensions:
                          extension: {url: null, max: 0, index: 20}
                        elements:
                          extension:
                            index: 20
                            slicing:
                              slices:
                                extension:
                                  match: {}
                                  schema: {index: 20}
                                  max: 0
                          url:
                            type: uri
                            pattern: {type: Uri, value: author}
                            index: 21
                          value:
                            choices: [valueString]
                            index: 23
                          valueString: {type: string, choiceOf: value, index: 24}
                        required: [valueString, value]
                    notes:
                      match: {}
                      schema:
                        isModifier: false
                        short: Information about the change
                        type: Extension
                        index: 25
                        extensions:
                          extension: {url: null, max: 0, index: 26}
                        elements:
                          extension:
                            index: 26
                            slicing:
                              slices:
                                extension:
                                  match: {}
                                  schema: {index: 26}
                                  max: 0
                          url:
                            type: uri
                            pattern: {type: Uri, value: notes}
                            index: 27
                          value:
                            choices: [valueString]
                            index: 29
                          valueString: {type: string, choiceOf: value, index: 30}
                        required: [valueString, value]
              url:
                type: uri
                pattern: {type: Uri, value: revision}
                index: 31
              value:
                choices: []
                index: 33
            required: [extension]
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-history'}
    index: 34
  value:
    choices: []
    index: 36
package_version: 1.8.0
extensions:
  name:
    isModifier: false
    short: The name of this set of history entries
    index: 0
    comments: Typically, a value set will have a set of history entries for each major publication milestone.
    type: Extension
    elements:
      extension:
        index: 1
        slicing:
          slices:
            extension:
              match: {}
              schema: {index: 1}
              max: 0
      url:
        type: uri
        pattern: {type: Uri, value: name}
        index: 2
      value:
        choices: [valueString]
        index: 4
      valueString: {type: string, choiceOf: value, index: 5}
    extensions:
      extension: {url: null, max: 0, index: 1}
    url: null
    required: [valueString, value]
  revision:
    isModifier: false
    short: Audit of all changes for a history entry
    index: 6
    type: Extension
    array: true
    elements:
      extension:
        isModifier: false
        short: Date the change was made
        type: Extension
        index: 7
        slicing:
          slices:
            date:
              match: {}
              schema:
                isModifier: false
                short: Date the change was made
                type: Extension
                _required: true
                index: 7
                extensions:
                  extension: {url: null, max: 0, index: 8}
                elements:
                  extension:
                    index: 8
                    slicing:
                      slices:
                        extension:
                          match: {}
                          schema: {index: 8}
                          max: 0
                  url:
                    type: uri
                    pattern: {type: Uri, value: date}
                    index: 9
                  value:
                    choices: [valueDateTime]
                    index: 11
                  valueDateTime: {type: dateTime, choiceOf: value, index: 12}
                required: [valueDateTime, value]
            id:
              match: {}
              schema:
                isModifier: false
                short: Version marker after the change was made
                type: Extension
                _required: true
                index: 13
                extensions:
                  extension: {url: null, max: 0, index: 14}
                elements:
                  extension:
                    index: 14
                    slicing:
                      slices:
                        extension:
                          match: {}
                          schema: {index: 14}
                          max: 0
                  url:
                    type: uri
                    pattern: {type: Uri, value: id}
                    index: 15
                  value:
                    choices: [valueString]
                    index: 17
                  valueString: {type: string, choiceOf: value, index: 18}
                required: [valueString, value]
            author:
              match: {}
              schema:
                isModifier: false
                short: Who made the change
                type: Extension
                _required: true
                index: 19
                extensions:
                  extension: {url: null, max: 0, index: 20}
                elements:
                  extension:
                    index: 20
                    slicing:
                      slices:
                        extension:
                          match: {}
                          schema: {index: 20}
                          max: 0
                  url:
                    type: uri
                    pattern: {type: Uri, value: author}
                    index: 21
                  value:
                    choices: [valueString]
                    index: 23
                  valueString: {type: string, choiceOf: value, index: 24}
                required: [valueString, value]
            notes:
              match: {}
              schema:
                isModifier: false
                short: Information about the change
                type: Extension
                index: 25
                extensions:
                  extension: {url: null, max: 0, index: 26}
                elements:
                  extension:
                    index: 26
                    slicing:
                      slices:
                        extension:
                          match: {}
                          schema: {index: 26}
                          max: 0
                  url:
                    type: uri
                    pattern: {type: Uri, value: notes}
                    index: 27
                  value:
                    choices: [valueString]
                    index: 29
                  valueString: {type: string, choiceOf: value, index: 30}
                required: [valueString, value]
      url:
        type: uri
        pattern: {type: Uri, value: revision}
        index: 31
      value:
        choices: []
        index: 33
    extensions:
      date:
        isModifier: false
        short: Date the change was made
        index: 7
        type: Extension
        elements:
          extension:
            index: 8
            slicing:
              slices:
                extension:
                  match: {}
                  schema: {index: 8}
                  max: 0
          url:
            type: uri
            pattern: {type: Uri, value: date}
            index: 9
          value:
            choices: [valueDateTime]
            index: 11
          valueDateTime: {type: dateTime, choiceOf: value, index: 12}
        _required: true
        extensions:
          extension: {url: null, max: 0, index: 8}
        url: null
        required: [valueDateTime, value]
      id:
        isModifier: false
        short: Version marker after the change was made
        index: 13
        type: Extension
        elements:
          extension:
            index: 14
            slicing:
              slices:
                extension:
                  match: {}
                  schema: {index: 14}
                  max: 0
          url:
            type: uri
            pattern: {type: Uri, value: id}
            index: 15
          value:
            choices: [valueString]
            index: 17
          valueString: {type: string, choiceOf: value, index: 18}
        _required: true
        extensions:
          extension: {url: null, max: 0, index: 14}
        url: null
        required: [valueString, value]
      author:
        isModifier: false
        short: Who made the change
        index: 19
        type: Extension
        elements:
          extension:
            index: 20
            slicing:
              slices:
                extension:
                  match: {}
                  schema: {index: 20}
                  max: 0
          url:
            type: uri
            pattern: {type: Uri, value: author}
            index: 21
          value:
            choices: [valueString]
            index: 23
          valueString: {type: string, choiceOf: value, index: 24}
        _required: true
        extensions:
          extension: {url: null, max: 0, index: 20}
        url: null
        required: [valueString, value]
      notes:
        url: null
        isModifier: false
        short: Information about the change
        type: Extension
        index: 25
        extensions:
          extension: {url: null, max: 0, index: 26}
        elements:
          extension:
            index: 26
            slicing:
              slices:
                extension:
                  match: {}
                  schema: {index: 26}
                  max: 0
          url:
            type: uri
            pattern: {type: Uri, value: notes}
            index: 27
          value:
            choices: [valueString]
            index: 29
          valueString: {type: string, choiceOf: value, index: 30}
        required: [valueString, value]
    url: null
    required: [extension]
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/codesystem-history
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null