What is YAML?

YAML is a human-readable data-serialization language. It is commonly used for configuration files and in applications where data is being stored or transmitted.

Example:

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---
Resources:
  MyInstance:
    Type: AWS::EC2::Instance
    Properties:
      AvailabilityZone: us-east-1a
      ImageId: ami-0ed9277fb7eb570c9
      InstanceType: t2.micro