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

# Organizational Unit

> Nodes in a company's organisational structure

Organizational units represent nodes in a company's structure - departments, divisions, teams, or similar groupings. They can be nested via a parent reference to form a hierarchy. All properties follow the [dated property model](/platform/data-model).

## Properties

| Property                    | Description                                                                                                                           |
| --------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- |
| `name`                      | The unit's display name                                                                                                               |
| `description`               | Optional description                                                                                                                  |
| `email`                     | Contact email address                                                                                                                 |
| `phone`                     | Contact phone number                                                                                                                  |
| `tier`                      | The unit's level in the organisational hierarchy                                                                                      |
| `source_external_id`        | The unit's primary key in the source system. Must always be mapped - see [Source Properties](/platform/data-model#source-properties). |
| `source_external_parent_id` | The parent unit's primary key in the source system, used to resolve the hierarchy                                                     |
| `custom_properties`         | See [Custom Properties](/platform/data-model#custom-properties)                                                                       |