# Core Concepts 

This documentation cover more over-arching concepts of Evennia, often involving many [Core Components](../Components/Components-Overview.md) acting together.

## General concepts

```{toctree}
:maxdepth: 2

Messagepath.md
OOB.md
Async-Process.md
```

## Text processing
```{toctree}
:maxdepth: 2

Tags-Parsed-By-Evennia.md
Change-Message-Per-Receiver.md
Internationalization.md
Text-Encodings.md
```

## Access 

```{toctree}
:maxdepth: 2

Connection-Styles.md
Guests.md
Banning.md
```

## Extending the Server 

```{toctree}
:maxdepth: 2

Protocols.md
Models.md
Zones.md
```