{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "additionalProperties": false,
  "required": ["id", "name", "sku", "price", "stock_status"],
  "properties": {
    "id": { "type": "integer" },
    "name": { "type": "string" },
    "sku": { "type": "string" },
    "price": { "type": "string" },
    "stock_status": { "enum": ["instock", "outofstock", "onbackorder"] },
    "stock_quantity": { "type": ["integer", "null"] }
  }
}