---
title: "Send additional order items data"
slug: "send-additional-order-items-data"
abstract: "Overview of sending additional order items data to Sitecore CDP using the Batch API."
---
# Send additional order items data

::::tabs
:::tab{title="2.1"}

An order items data extension is an array that enables you to specify whatever name/value pairs (attributes) you want. Order items data extensions are optional and enable your organization to capture additional information with your order items.

The [order items data extension collection](https://doc.sitecore.com/cdp/en/developers/api/batch-api/batch-api-offline-orders/order-item-extension-data-model.html "Order item extension data model") is linked to an `orderItems` object, enabling you to extend your own requirements and custom attributes onto the order items object. You can insert one order items data extension within the array.

The following is a list of guidelines for using the order items data extension:

- Place the data extension data in the `extensions` array of objects.
- Only one data extension is supported per order item type.
- The `name` attribute must be `ext`.
- The `key` attribute must be `default`.
- An order items data extension has a maximum of 50 attributes.

The following is a list of guidelines for using attributes in the data extension:

- The attribute name must be alphanumeric \[A-Z,a-z,0-9\] as per the [JSON RFC 7159](https://www.rfc-editor.org/rfc/rfc7159) specification.
- You must write the attribute name of the data extension in camel case.
- The attribute name must be unique within the entire order item type.
- We recommend making the attribute name meaningful.
- If grouping is required, use common prefixes.

:::
:::tab{title="2.0"}

2.0 data model does not support this functionality.

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