Variable values can be assigned to objects while you are working with them. Or, as an alternative, you can assign values at the time of publishing by using the Variable Prompt. This is useful when you have a book, or group of topics, that you need to customize on a regular basis.
An employee contract is an example of where you might use the publishing prompt. Each time you publish the contract, you need to set values to cover a specific employee's details and conditions. By adding the prompt to the variable, Author-it requests a value from you at the time of publishing, and is used only for this job. By using the variable prompt, you can ensure that all of the values are updated for each new contract.