AWS CloudFormation
API Reference (API Version 2010-05-15)

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The Parameter data type.



The key associated with the parameter. If you don't specify a key and value for a particular parameter, AWS CloudFormation uses the default value that is specified in your template.

Type: String

Required: No


The input value associated with the parameter.

Type: String

Required: No


Read-only. The value that corresponds to a Systems Manager parameter key. This field is returned only for SSM parameter types in the template.

Type: String

Required: No


During a stack update, use the existing parameter value that the stack is using for a given parameter key. If you specify true, do not specify a parameter value.

Type: Boolean

Required: No

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following:

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