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

# Overview

> Reusable sets of options used in custom fields — dropdowns, checkboxes, and more

Data lists store reusable sets of key-value options used in custom fields — for example, the choices in a dropdown, checkbox group, or radio button set. Manage both the lists themselves and their individual items.

## What you can do

* **Create and manage data lists** that define sets of options
* **Add, update, and remove items** within a data list
* **Reuse lists across fields** — one data list can power multiple custom fields

## Related resources

| Resource            | Relationship                                               |
| ------------------- | ---------------------------------------------------------- |
| **Data List Items** | The individual options within a list                       |
| **Event Fields**    | Custom fields that reference a data list for their options |
| **Session Fields**  | Session-level custom fields using data lists               |
| **Sponsor Fields**  | Sponsor-level custom fields using data lists               |

## Key concepts

**List and items** — A data list is a container. Data list items are the individual options (e.g., "Option A", "Option B") within that container. Use the Data List Items endpoints to manage the options.

**Reusability** — A single data list can be referenced by multiple custom fields across different resource types, keeping your option sets consistent.