{
  "resourceType": "StructureDefinition",
  "id": "ItemSource",
  "url": "https://www.oegd.de/fhir/seu/StructureDefinition/ItemSource",
  "name": "ItemSource",
  "title": "ItemSource",
  "status": "draft",
  "description": "Item source",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "expression": "Questionnaire.item",
      "type": "element"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "ItemSource",
        "definition": "Item source"
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "https://www.oegd.de/fhir/seu/StructureDefinition/ItemSource"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "Coding"
          }
        ],
        "mustSupport": true,
        "binding": {
          "strength": "required",
          "valueSet": "https://www.oegd.de/fhir/seu/ValueSet/ItemSourceVS"
        }
      }
    ]
  }
}