description: A FHIR Query that resolves to one or more resources that can be displayed to the user to help provide context for answering a question. For example, if the question is \"Has the patient discussed this issue on any visits in the past year?\", the contextExpression might return the set of patient's encounters for the prior 12 month period to help jog the practitioner's memory. If there are multiple repetitions of this extension, then each is providing a distinct set of context.  For example, one repetition might expose 'potentially relevant procedures' while another might expose 'potentially relevant encounters'.
package_name: hl7.fhir.uv.sdc.r4b
derivation: constraint
name: ContextExpressionExtension
type: Extension
elements:
  extension:
    short: Context label
    index: 0
    slicing:
      slices:
        label:
          match: {}
          schema:
            short: Context label
            _required: true
            index: 0
            elements:
              url:
                type: uri
                pattern: {type: Uri, value: label}
                index: 1
              value:
                choices: [valueString]
                index: 3
              valueString: {type: string, choiceOf: value, index: 4}
            required: [valueString, value]
        expression:
          match: {}
          schema:
            short: Context expression
            _required: true
            index: 5
            elements:
              url:
                type: uri
                pattern: {type: Uri, value: expression}
                index: 6
              value:
                choices: [valueExpression]
                index: 8
              valueExpression: {type: Expression, choiceOf: value, index: 9}
            required: [valueExpression, value]
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-contextExpression'}
    index: 10
  value:
    choices: []
    index: 12
package_version: 3.0.0
extensions:
  label:
    url: null
    short: Context label
    _required: true
    index: 0
    elements:
      url:
        type: uri
        pattern: {type: Uri, value: label}
        index: 1
      value:
        choices: [valueString]
        index: 3
      valueString: {type: string, choiceOf: value, index: 4}
    required: [valueString, value]
  expression:
    url: null
    short: Context expression
    _required: true
    index: 5
    elements:
      url:
        type: uri
        pattern: {type: Uri, value: expression}
        index: 6
      value:
        choices: [valueExpression]
        index: 8
      valueExpression: {type: Expression, choiceOf: value, index: 9}
    required: [valueExpression, value]
class: extension
kind: complex-type
url: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-contextExpression
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 3.0.0
required: [extension]