Validate!

• If it is important to have a certain type in a certain place in a YAML file...
• (Same actually goes for JSON - what about forgetting to quote the zip code (string!) "01234"?)
• then use a Schema Validator! e.g. JSON Schema
• We are using that for all our YAML files in openQA
• Also protects you from processing an unexpected data stucture with a recursive tree of aliases ("Billion laughs attack", which is not a problem of YAML itself actually)