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Hidden input elements are HTML controls in the form of
They are not displayed in the form, but can be used to retrieve values to be used in the context of the form (e.g., using Angular bindings).

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Binding a Hidden Element to a Process Variable

A hidden input can be bound to a process variable using the cam-variable-type and cam-variable-name directives:
In the example above, the hidden input field is bound to the variable named CUSTOMER_ID of type String and contains the value testuser.

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Supported Variable Types for Hidden Elements

The hidden input field supports the same variable types as the single line text input <input type="text"></input>. See the section on Supported Variable Types for details.