{
  "resourceType": "StructureDefinition",
  "id": "twin",
  "url": "https://treestudio.healthincode.com/fhir/StructureDefinition/Twin",
  "name": "Twin",
  "title": "twin",
  "status": "active",
  "description": "Profile to represent a Twin relation of patients",
  "fhirVersion": "4.0.0",
  "kind": "resource",
  "abstract": false,
  "type": "Group",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Group",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Group.extension",
        "path": "Group.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "rules": "open"
        }
      },
      {
        "id": "Group.extension:monozygotic",
        "path": "Group.extension",
        "sliceName": "monozygotic",
        "type": [
          {
            "code": "Extension",
            "profile": [
              "https://treestudio.healthincode.com/fhir/StructureDefinition/twin-monozygotic"
            ]
          }
        ]
      },
      {
        "id": "Group.member",
        "path": "Group.member",
        "min": 0,
        "max": "1"
      },
      {
        "id": "Group.member.entity",
        "path": "Group.member.entity",
        "min": 0,
        "max": "*",
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "https://treestudio.healthincode.com/fhir/StructureDefinition/Individual"
            ]
          }
        ]
      }
    ]
  }
}