# Concepts

This section delves into domain-specific topics related to the Mews system. An understanding of these will help you to make the most effective use of the API.

{% hint style="info" %}

#### Terminology

Some of the terms used in the API, such as *enterprise*, *customer* or *resource* may not be familiar. For example, we use *resource* to describe guest rooms and other types of bookable space. For a full description of all the terms used, see the [Mews Glossary for Open API users](/getting-started/glossary.md).
{% endhint %}

## Contents

* [Multi-property](/connector-api/concepts/multi-property.md)\
  An explanation of multi-property operation with Portfolio Access Tokens.
* [Restrictions](/connector-api/concepts/restrictions.md)\
  An explanation of the algorithms used to support setting and clearing restrictions.
* [Taxation](/connector-api/concepts/taxation.md)\
  An explanation of the different tax environments and how they impact your integration.
* [Time units](/connector-api/concepts/time-units.md)\
  A detailed explanation of the time units used to describe service reservations.


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