- YAML
- Human readable data serialization language
- Unordered collection of key:value pairs
- Lists: a key and an order set of values
- Dictionaries: a data structure, a collection of key:value pairs
- Indentation matters
- Used in CloudFormation
- JSON
- JavaScript Object Language
- key:value
- Objects {} ans Arrays []
- Indentation doesn’t matter
- Used in CloudFormation and Policy Documents n