> ## 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.

# Booking

> Reference for the Booking dimension hierarchies.

## Booking

| Hierarchy | Description                                                                                                                                                                       |
| --------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Books     | List of books, linked to risk numbers via the trade attributes.                                                                                                                   |
| Desks     | List of desks.                                                                                                                                                                    |
| Legs      | List of Leg Ids under a single Trade Id. This hierarchy is enabled when the property [`mr.pnl.enable.leg-id`](../../properties/config-properties/mr-pnl-config) is set to `true`. |
| Trades    | Unique position identifiers, such as trade number.                                                                                                                                |