{
  "resourceType": "StructureDefinition",
  "url": "https://example.org/fhir/StructureDefinition/DocumentReference",
  "name": "DocumentReference",
  "status": "draft",
  "description": "相关文档信息（包含检查，检验，心电，入院记录， 出院记录， 账单等文档）",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "DocumentReference",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/DocumentReference",
  "derivation": "constraint"
}