1. Introduction
2. Basics
   1. Built-in predicates
   2. Macros
   3. Type specs
   4. Working with schemas
3. Optional keys and values
4. Nested data
5. Reusing schemas
6. Params
7. JSON
8. Error messages
9. Advanced
   1. Composing schemas
   2. Custom predicates
   3. Custom types
   4. Filtering
   5. Key maps
   6. Predicate logic
   7. Processor steps
   8. Rule AST
   9. Unexpected keys
10. Extensions
    1. Hints
    2. Info
    3. JSON Schema
    4. Monads

TOC