{
  "$id": "http://gov.uk/schema/v1.0.0/string/error",
  "title": "Error message",
  "_name": "string.error",
  "description": "Error message",
  "type": "object",
  "properties": {
    "_type": {
      "const": "string.error"
    }
  },
  "allOf": [
    {
      "$ref": "http://gov.uk/schema/v1.0.0/definition/string"
    }
  ]
}