Schema fails to validate Amazon AWS provided example.

[techzilla]

Schema fails to validate amazon-eks-vpc-private-subnets.yaml, referenced in official EKS doc page creating-a-vpc, using cloudformation.schema.json.

I received these validation errors,

[{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 171,
	"startColumn": 9,
	"endLineNumber": 175,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 176,
	"startColumn": 9,
	"endLineNumber": 177,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 178,
	"startColumn": 9,
	"endLineNumber": 179,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 183,
	"startColumn": 16,
	"endLineNumber": 183,
	"endColumn": 17
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 192,
	"startColumn": 9,
	"endLineNumber": 196,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 197,
	"startColumn": 9,
	"endLineNumber": 198,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 199,
	"startColumn": 9,
	"endLineNumber": 200,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 204,
	"startColumn": 16,
	"endLineNumber": 204,
	"endColumn": 17
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 212,
	"startColumn": 9,
	"endLineNumber": 216,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 217,
	"startColumn": 9,
	"endLineNumber": 218,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 219,
	"startColumn": 9,
	"endLineNumber": 220,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 224,
	"startColumn": 16,
	"endLineNumber": 224,
	"endColumn": 17
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 232,
	"startColumn": 9,
	"endLineNumber": 236,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 237,
	"startColumn": 9,
	"endLineNumber": 238,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 239,
	"startColumn": 9,
	"endLineNumber": 240,
	"endColumn": 1
},{
	"resource": "/home/username/projects/ansible_aws_eks/playbooks/files/cloudformation/vpc_public_private_subnets-template.yaml",
	"owner": "_generated_diagnostic_collection_name_#1",
	"severity": 8,
	"message": "Incorrect type. Expected \"string\".",
	"source": "yaml-schema: AWS CloudFormation",
	"startLineNumber": 244,
	"startColumn": 16,
	"endLineNumber": 244,
	"endColumn": 17
}]

One section that causes these errors looks like the following:

 PrivateSubnet02:
    Type: AWS::EC2::Subnet
    Metadata:
      Comment: Private Subnet 02
    Properties:
      AvailabilityZone:
        Fn::Select:
        - '1'
        - Fn::GetAZs:
            Ref: AWS::Region
      CidrBlock:
        Ref: PrivateSubnet02Block
      VpcId:
        Ref: VPC
      Tags:
      - Key: Name
        Value: !Sub "${AWS::StackName}-PrivateSubnet02"
      - Key: kubernetes.io/role/internal-elb
        Value: 1