message: Add documentType parameter and possible enums for healthcare
diff: "modelAsString": true
  }
  },
  + "documentType": {
  + "type": "string",
  + "description": "Document type that can be provided as input for Fhir Documents.",
  + "enum": [
  + "None",
  + "ClinicalTrial",
  + "DischargeSummary",
  + "ProgressNote",
  + "HistoryAndPhysical",
  + "Consult",
  + "Imaging",
  + "Pathology",
  + "ProcedureNote"
  + ]
  + },
  "stringIndexType": {
  "$ref": "common.json#/definitions/StringIndexType"
  }
  