{
  "type": "object",
  "additionalProperties": false,
  "definitions": {
    "weight": {
      "type": "number",
      "minimum": 0,
      "multipleOf": 0.01
    },
    "weight_unit": {
      "type": "string",
      "enum": [
        "kg",
        "g",
        "lb",
        "oz"
      ]
    }
  }
}