How to further enhance XKB configuration

1. Overview

2. The Basics

3. Enhancing XKB Configuration

3.1. Levels And Groups

4. Defining New Layouts

4.1. Predefined XKB Symbol Sets

4.2. Key Types

4.2.1. More On Definitions Of Types

4.3. Rules

4.4. Descriptive Files of Rules

4.4.1. Old Descriptive Files