# Data dictionary
<a name="data-dictionary"></a>

Cost and Usage Reports contain details about your usage. The following sections list and describe a subset of columns that you see in your report, and the corresponding definitions.

To download the full list of the columns that can appear in Amazon Cost and Usage Reports (Amazon CUR) and the services that the columns apply to, download [Column\$1Attribute\$1Service.zip](samples/Column_Attribute_Service.zip). This comma-separated values (CSV) list includes **Identity**, **Bill**, **LineItem**, **Reservation**, **Pricing**, and **Product** columns.

Every Cost and Usage Report includes **Identity**, **Bill**, and **LineItem** columns. All other columns are included in your report only if your monthly Amazon usage generates data to populate those columns.

**Topics**
+ [Identity details](identity-columns.md)
+ [Billing details](billing-columns.md)
+ [Line item details](Lineitem-columns.md)
+ [Reservation details](reservation-columns.md)
+ [Pricing details](pricing-columns.md)
+ [Product details](product-columns.md)
+ [Resource tags details](resource-tags-columns.md)
+ [Savings Plans details](savingsplans-columns.md)
+ [Cost Categories details](cost-categories-columns.md)
+ [Discount details](discount-details.md)
+ [Split line item details](split-line-item-columns.md)