resourceType: Questionnaire
id: cdex-expression-based-prepopulation-questionnaire-example
meta:
  profile:
    - >-
      http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/dtr-sdc-questionnaire

# ==== launchContext Extension ====

extension:
  - extension:
      - url: name
        valueCoding:
          system: 'http://hl7.org/fhir/uv/sdc/CodeSystem/launchContext'
          code: patient
      - url: type
        valueCode: Patient
    url: >-
      http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-launchContext
  - extension:
      - url: name
        valueCoding:
          system: 'http://hl7.org/fhir/us/davinci-cdex/CodeSystem/cdex-temp'
          code: task
      - url: type
        valueCode: Task
    url: >-
      http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-launchContext

# ===================================

url: 'http://example.org/cdex-questionnaire-example1'
version: 2.0.0
name: CDEXExpressionBasedPrepopulationQuestionnaireExample
title: CDex Expression Based Prepopulation Questionnaire Example
status: active
subjectType:
  - Patient
date: '2023-05-03'
item:
  - linkId: '1'

# ==== itemContext Extension ====
    extension:
      - url: >-
          http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemPopulationContext
        valueExpression:
          name: conditions
          language: application/x-fhir-query
          expression: >-
            GET Condition?patient={{%patient.id}}&clinical-status=active,recurrance,remission
# ================================

# ==== variable Extension =======
      - url: >-
          http://hl7.org/fhir/StructureDefinition/variable
        valueExpression:
          name: condition_list
          language: text/fhirpath
          expression: >-
            '13645005,19829001,233604007,195967001,84114007,73430006,190905008,316358009'
# ================================

# ==== variable initalExpression Extension  =======
      - url: >-
          http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-initialExpression
        valueExpression:
          language: text/fhirpath
          expression: >-
            %conditions.entry.resource.code.coding.where(code in %condition_list.split(',')).text

# ================================

    text: >-
      Relevant Patient Diagnoses (conditions that might be expected to improve
      with oxygen therapy)
    type: text
    required: true


  - linkId: '2'

# ==== itemContext Extension ====
    extension:
      - url: >-
          http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemPopulationContext
        valueExpression:
          name: orders
          language: application/x-fhir-query
          expression: >-
            GET ServiceRequest?patient={{%patient.id}}&status="completed"&date={{%task.input.where(type.coding.code='service-date').valueDate}}
# ================================

# ==== variable Extension =======
      - url: >-
          http://hl7.org/fhir/StructureDefinition/variable
        valueExpression:
          name: reason_list
          language: text/fhirpath
          expression: >-
            '1,2,3,4'
# ================================

# ==== variable initalExpression Extension  =======
      - url: >-
          http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-initialExpression
        valueExpression:
          language: text/fhirpath
          expression: >-
            %orders.entry.resource.reasonCode.where(coding.code in %reason_list.split(',')).coding.code

# ================================

    text: Order Reason
    type: choice
    required: true
    answerOption:
      - valueCoding:
          system: 'http://example.org'
          code: '1'
          display: Initial or original order for certification
      - valueCoding:
          system: 'http://example.org'
          code: '2'
          display: Change in status
      - valueCoding:
          system: 'http://example.org'
          code: '3'
          display: Revision or change in equipment
      - valueCoding:
          system: 'http://example.org'
          code: '4'
          display: Replacement