description: Provides guidelines for rendering multi-column choices.  I.e. when displaying a list of codes (for `choice` or `open-choice` items) or a list of resources (for `reference` items), this extension allows the drop-down to have multiple columns.  For codes, the author can pick additional code system properties to display - such as alternate display names strength or form for drug codes, etc.  For references, the author can choose particular columns from the resource (e.g. first name, last name, specialty, address).
package_name: hl7.fhir.uv.sdc
derivation: constraint
name: ChoiceColumnExtension
type: Extension
elements:
  extension:
    index: 0
    slicing:
      slices:
        path:
          match: {}
          schema:
            short: Column path
            _required: true
            index: 1
            extensions: {}
            elements:
              extension: {index: 2}
              url:
                pattern: {type: Uri, value: path}
                index: 3
              value:
                choices: [valueString]
                index: 5
              valueString: {type: string, choiceOf: value, index: 6}
        label:
          match: {}
          schema:
            short: Column label
            index: 7
            extensions: {}
            elements:
              extension: {index: 8}
              url:
                pattern: {type: Uri, value: label}
                index: 9
              value:
                choices: [valueString]
                index: 11
              valueString: {type: string, choiceOf: value, index: 12}
        width:
          match: {}
          schema:
            short: Width of column
            index: 13
            extensions: {}
            elements:
              extension: {index: 14}
              url:
                pattern: {type: Uri, value: width}
                index: 15
              value:
                choices: [valueQuantity]
                index: 17
              valueQuantity: {type: Quantity, choiceOf: value, index: 18}
        forDisplay:
          match: {}
          schema:
            short: Use for display ?
            index: 19
            extensions: {}
            elements:
              extension: {index: 20}
              url:
                pattern: {type: Uri, value: forDisplay}
                index: 21
              value:
                choices: [valueBoolean]
                index: 23
              valueBoolean: {type: boolean, choiceOf: value, index: 24}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-choiceColumn'}
    index: 25
  value:
    choices: []
    index: 27
package_version: 4.0.0-ballot
extensions:
  path:
    url: null
    short: Column path
    _required: true
    index: 1
    extensions: {}
    elements:
      extension: {index: 2}
      url:
        pattern: {type: Uri, value: path}
        index: 3
      value:
        choices: [valueString]
        index: 5
      valueString: {type: string, choiceOf: value, index: 6}
  label:
    url: null
    short: Column label
    index: 7
    extensions: {}
    elements:
      extension: {index: 8}
      url:
        pattern: {type: Uri, value: label}
        index: 9
      value:
        choices: [valueString]
        index: 11
      valueString: {type: string, choiceOf: value, index: 12}
  width:
    url: null
    short: Width of column
    index: 13
    extensions: {}
    elements:
      extension: {index: 14}
      url:
        pattern: {type: Uri, value: width}
        index: 15
      value:
        choices: [valueQuantity]
        index: 17
      valueQuantity: {type: Quantity, choiceOf: value, index: 18}
  forDisplay:
    url: null
    short: Use for display ?
    index: 19
    extensions: {}
    elements:
      extension: {index: 20}
      url:
        pattern: {type: Uri, value: forDisplay}
        index: 21
      value:
        choices: [valueBoolean]
        index: 23
      valueBoolean: {type: boolean, choiceOf: value, index: 24}
class: extension
kind: complex-type
url: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-choiceColumn
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 4.0.0-ballot
required: [extension]