# ThingsBoard Relations

:::info
Aim:
To describe the relation meaning in ThingsBoard, and what's the different between `Contains` and `Manages`.
:::

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## Outbound & Inbound


Outbound relations: `from`

Inbound relations: `to`

Ex: Data in an asset A is outbond from the device a-1.

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## Contains & Manages


Contains:
This relation indicates that one entity is a part of another entity. For example, a building (entity) might contain several rooms (entities). It’s a way to represent hierarchical or nested structures.

Manages:
The relation signifies that one entity has control or administrative responsibilities over another entity. For instance, a user (entity) might manage several devices (entities). It’s used to represent supervisory or administrative relationships.

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## Reference

[ThingsBoard doc - relations](https://thingsboard.io/docs/user-guide/entities-and-relations/#relations)