{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/fuel-data",
  "title": "FuelData",
  "type": "object",
  "properties": {
    "type": {
      "$ref": "#/components/schemas/fuel-type"
    },
    "quantity": {
      "title": "Quantity",
      "description": "The quantity of fuel purchased.",
      "type": [
        "string",
        "null"
      ]
    },
    "unit_price": {
      "title": "Unit Price",
      "description": "The price per unit of fuel.",
      "type": [
        "integer",
        "null"
      ]
    },
    "unit_of_measure": {
      "$ref": "#/components/schemas/fuel-unit-of-measure"
    }
  }
}