2.2.1. Syntax and concepts

2.2.1.1. What are categories?
2.2.1.2. Apply and use own categories
2.2.1.3. Variable values - functions
2.2.1.4. Interpretation of similar blocks with and without category
2.2.1.5. Join blocks
2.2.1.6. Use encrypted passwords in config file
2.2.1.7. Use macros