> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# BookDescription

The **BookDescription** store contains the book descriptions.
It is indexed by **Book** and **AsOfDate**.

| Store Field | Key | CanBeNull | Type (+Default Value - if applicable) | Cube Field                                                      | Description                                                                                       |
| ----------- | --- | --------- | ------------------------------------- | --------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
| Book        | Y   |           | String                                | See field in referencing store ([TradeMapping](./trademapping)) | Name of the book.                                                                                 |
| Desk        |     |           | String                                | [Desks](../../cube/desks)                                       | Name of the desk.                                                                                 |
| IRT\_Desk   |     |           | String                                | [IRT Desk](../../cube/irt-desk)                                 | Indicates whether the desk is an IRT desk. ACR is calculated separately for desks flagged as IRT. |
| AsOfDate    | Y   |           | LOCALDATE\[yyyy-mm-dd]                |                                                                 | Timestamp (at close of business) for the data.                                                    |