fhir扩展,它是一个对象数组

Question

我试图理解我应该如何实现一个扩展字段,该字段应该包含"Objects"的数组/列表.目前规格说扩展只能包含"其中一个23":

  "valueInteger" : <integer>
  "valueDecimal" : <decimal>
  "valueDateTime" : "<dateTime>"
  "valueDate" : "<date>"
  "valueInstant" : "<instant>"
  "valueString" : "<string>"
  "valueUri" : "<uri>"
  "valueBoolean" : <boolean>
  "valueCode" : "<code>"
  "valueBase64Binary" : "<base64Binary>"
  "valueCoding" : { Coding }
  "valueCodeableConcept" : { CodeableConcept }
  "valueAttachment" : { Attachment }
  "valueIdentifier" : { Identifier }
  "valueQuantity" : { Quantity }
  "valueRange" : { Range }
  "valuePeriod" : { Period }
  "valueRatio" : { Ratio }
  "valueHumanName" : { HumanName }
  "valueAddress" : { Address }
  "valueContactPoint" : { ContactPoint }
  "valueSchedule" : { Schedule }
  "valueReference" : { Reference }

我需要类似的东西

{
  "extension": {
     "url": "list-of-things", 
     "valueArray" : [
          {"code":"123","value":"Yellow"},
          {"code":"333","value":"Cab"}
     ]
  }
}

你能指点我正确的方向吗,谢谢!

Answer 1

扩展值不能是数组 - 处理重复的多态类型太难了.因此,通过重复扩展元素并声明相同的URL来处理重复结构.使用嵌套扩展来处理复杂结构.定义为复杂扩展的声明子级的扩展不需要具有完整的URL声明.

你的结构看起来像这样:

{
  "extension: [{
    "url": "http://example.org/fhir/StructureDefinition/list-of-things",
    "extension" [{
      "url": "code",
      "valueCode": "123"
    },
    {
      "url": "value",
      "valueString": "Yellow"
    }]
  },
  {
    "url": "http://example.org/fhir/StructureDefinition/list-of-things",
    "extension" [{
      "url": "code",
      "valueCode": "333"
    },
    {
      "url": "value",
      "valueString": "Cab"
    }]
  }]
}