AWSTemplateFormatVersion: "2010-09-09"
Resources:
  Certificate1:
    Type: "AWS::CertificateManager::Certificate"
    Properties:
      DomainName: "subdomain.example.com"
      DomainValidationOptions:
        - DomainName: "subdomain.example.com"
          ValidationDomain: "example.net"
  Certificate2:
    Type: "AWS::CertificateManager::Certificate"
    Properties:
      # Initially, the linting code did not check for a leading .
      # This case ensures that we're actually dealing with a subdomain, not just ending with the validation domain.
      DomainName: "prefixed-example.com"
      DomainValidationOptions:
        - DomainName: "prefixed-example.com"
          ValidationDomain: "example.com"