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AWS CloudFormation
User Guide (API Version 2010-05-15)

Intrinsic Function Reference

AWS CloudFormation provides several built-in functions that help you manage your stacks. Use intrinsic functions in your templates to assign values to properties that are not available until runtime.

Note

You can use intrinsic functions only in specific parts of a template. Currently, you can use intrinsic functions in resource properties, metadata attributes, and update policy attributes.