Provides short information about the order item.
- ItemId, The Id of the item.
- Type, The Type (see GetItemTypes method for all item types) of the item.
- Title, The item title.
- Quantity, The quantity bought of this item.
- UnitPrice, The unit price including VAT.
- VatRate, VAT rate for the item.
- OwnReferences, The sellers own references for the item.
- MerchantPartNumber, The sellers own part number for the item. (Currently not supported.)