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User-Defined Functions are reusable CEL expressions that can be called by name inside the expressions of Calculated Channels, Rules, and other User-Defined Functions. They allow teams to define shared logic in one place and reference it across multiple expressions, ensuring consistency and reducing duplication. When a User-Defined Function is updated, the change applies everywhere it is referenced without requiring updates to individual expressions.

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Settings

The following table describes each setting available when creating or editing a User-Defined Function.

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Input data types

Each input in a User-Defined Function must be assigned one of the following data types.

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Lifecycle actions

The following table describes the actions available for managing a User-Defined Function after it has been created.

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Behavior

The following table describes known constraints and behaviors to be aware of when working with User-Defined Functions.