{
  "resourceType": "StructureDefinition",
  "id": "category-additional",
  "url": "http://hl7.org.au/fhir/StructureDefinition/category-additional",
  "version": "1.1.0",
  "name": "CategoryAdditional",
  "title": "Category Additional",
  "status": "draft",
  "date": "2019-05-01",
  "publisher": "Health Level Seven Australia (Orders and Observations WG)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.org.au",
          "use": "work"
        }
      ]
    }
  ],
  "description": "This extension applies to resources with a single category ([0..1]) element allowing for additional category(s) to the one present in the the 'category' data element.",
  "fhirVersion": "3.0.1",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "contextType": "resource",
  "context": [
    "Resource"
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {},
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Additional category",
        "definition": "One or more categories that are considered additional."
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://hl7.org.au/fhir/StructureDefinition/category-additional"
      },
      {
        "id": "Extension.value[x]:valueCoding",
        "path": "Extension.valueCoding",
        "sliceName": "valueCoding",
        "short": "Additional Category Code",
        "min": 1,
        "type": [
          {
            "code": "Coding"
          }
        ],
        "binding": {
          "strength": "example",
          "description": "Additional Category Codes (HL7)",
          "valueSetReference": {
            "reference": "http://hl7.org/fhir/ValueSet/diagnostic-service-sections"
          }
        }
      }
    ]
  }
}