Example of guidanceresponse requesting additional data

{
  "resourceType" : "GuidanceResponse",
  "id" : "additional-data-example",
  "requestIdentifier" : {
    "system" : "http://example.org",
    "value" : "guidanceRequest2"
  },
  "identifier" : [{
    "system" : "http://example.org",
    "value" : "guidanceResponse2"
  }],
  "moduleUri" : "http://someguidelineprovider.org/diabetes-guidelines.html",
  "status" : "data-required",
  "subject" : {
    "reference" : "Patient/example"
  },
  "encounter" : {
    "reference" : "Encounter/example"
  },
  "occurrenceDateTime" : "2017-03-10T16:02:00Z",
  "performer" : {
    "reference" : "Device/software"
  },
  "reason" : [{
    "concept" : {
      "text" : "Diabetes Guideline"
    }
  }],
  "dataRequirement" : [{
    "type" : "Observation",
    "mustSupport" : ["value"],
    "codeFilter" : [{
      "path" : "code",
      "code" : [{
        "system" : "http://loinc.org",
        "code" : "4548-4",
        "display" : "Hemoglobin A1c/Hemoglobin.total in Blood"
      }]
    }]
  }]
}