> ## 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.

# Book parent child v2

Download sample file: [BookParentChild.v2.csv](../assets/csv/BookParentChild.v2.csv)

This file provides a description of the organisation's book structure, using a parent/child relationship, including identification and description of desks.

This Book Parent Child v2 file type is identified using the pattern: **`**/BookParentChild*.v2.csv{,.gz}`** (as specified by book-parent-child.v2.file-pattern). A sample file is `BookParentChild.v2`. This file is loaded using the **BookParentChild** topic. See the [Topic Aliases table](../dev/dev-ref-impl/dev-dlc/dlc-frtb-config#topic-aliases) for an understanding of the topic aliases associated with each topic.

|           |         |          |                   |                                                          |             |
| --------- | ------- | -------- | ----------------- | -------------------------------------------------------- | ----------- |
| **Field** | **Key** | **Null** | **FieldType**     | **Description**                                          | **Example** |
| Name      | Y       | N        | String            | Name of the node in the Book/Desk hierarchy.             |             |
| Parent    | N       | Y        | String            | Name of the parent node (or null if there is no parent). |             |
| AsOfDate  | Y       | N        | Date ‘YYYY-MM-DD’ | Timestamp (at close of business) for the data.           |             |