{
  "type": "object",
  "properties": {
    "line_items": {
      "type": "array",
      "description": "List of genuine line items only. Do not include any summary or total row, even if it has the same column shape/position as a real line item.",
      "items": {
        "type": "object",
        "properties": {
          "description": {
            "type": "string",
            "description": "The description of the line item."
          },
          "quantity": {
            "type": "number",
            "description": "The quantity of the line item."
          },
          "unit_price": {
            "type": "number",
            "description": "The unit price of the line item."
          },
          "amount": {
            "type": "number",
            "description": "The amount of the line item."
          }
        },
        "required": ["description", "quantity", "unit_price", "amount"]
      }
    }
  },
  "required": ["line_items"]
}