YAML

A complete roadmap for YAML, from indentation rules to parser internals and security hardening. The series starts with syntax fundamentals, scalars and block styles, sequences and mappings, and multi-document streams, then moves into DRY patterns with anchors and aliases, type tags, and custom tag resolution. It covers the security hazards that make YAML dangerous—arbitrary code execution during deserialization, the Billion Laughs attack, and entity expansion DoS—before closing with spec differences between YAML 1.1 and 1.2, parser mechanics and AST structure, and JSON/YAML conversion.