{
  "resourceType": "StructureDefinition",
  "id": "3",
  "url": "https://example.org/fhir/StructureDefinition/MySpecimen",
  "name": "MySpecimen",
  "status": "draft",
  "date": "2023-08-04T13:07:28.4551153+00:00",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Specimen",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Specimen",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Specimen.meta",
        "path": "Specimen.meta"
      },
      {
        "id": "Specimen.meta.extension",
        "path": "Specimen.meta.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "rules": "open"
        },
        "min": 1
      },
      {
        "id": "Specimen.meta.extension:bodySite",
        "path": "Specimen.meta.extension",
        "sliceName": "bodySite",
        "min": 1,
        "max": "1",
        "type": [
          {
            "code": "Extension",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/bodySite"
            ]
          }
        ],
        "isModifier": false,
        "binding": {
          "strength": "preferred",
          "valueSet": "http://hl7.org/fhir/StructureDefinition/BodyStructure"
        }
      }
    ]
  }
}