{
  "type": "object",
  "description": "The type of cargo item and the number of units.",
  "properties": {
    "symbol": {
      "$ref": "./TradeSymbol.json"
    },
    "name": {
      "type": "string",
      "description": "The name of the cargo item type."
    },
    "description": {
      "type": "string",
      "description": "The description of the cargo item type."
    },
    "units": {
      "type": "integer",
      "description": "The number of units of the cargo item.",
      "minimum": 1
    }
  },
  "required": [
    "symbol",
    "name",
    "description",
    "units"
  ]
}