# Mappings

Mappings describe the mapping of data from one topic to another, i.e. the data flow between e.g. devices and processing rules.

See also: [Cybus::Mapping resource](/1-7-2/documentation/services/structure-of-commissioning-files/resources/cybus-mapping.md)

## Overview

<figure><img src="/files/oAeNyCAPPWtZVzrz2yj6" alt=""><figcaption></figcaption></figure>

By clicking on one of the listed mappings you get redirected to the [Details View](#details-view) of the selected mapping.

## Details View

<figure><img src="/files/LembxyBhaOoutqKbc1O5" alt=""><figcaption></figcaption></figure>

The mapping has resources itself. In this case there are only Mappings.

<figure><img src="/files/1HSpMfiwWbVtsMyCB017" alt=""><figcaption></figcaption></figure>

See also: [Mappings in the service commissioning file](/1-7-2/documentation/services/structure-of-commissioning-files/resources/cybus-mapping.md)

{% hint style="warning" %}
MQTT shared subscriptions are disabled on the Mapping entries view for the smooth operation of other clients possibly subscribed to the same topics.
{% endhint %}

<figure><img src="/files/eNbIngxioP82nR7Ulhvr" alt=""><figcaption></figcaption></figure>

### Mappings

These are the actual mappings from endpoint to topic, or vice versa, that have been specified.


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