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