Dynamic Actions are control items that dynamically can affect the display of regions or items on a page. There are several situations when you want to show or hide items. For example, a text item asking for a maiden name should only be displayed when the person is female and married. In other cases, it is irrelevant to ask for a maiden name (on the other hand, with homosexual marriages it's possible for a man to have a "maiden" name, and in some cases a man can adopt the family name of his wife, but let's not make this example more difficult than necessary).
The same applies to the Commission field in the employees table. This item should only be enterable when the employee's job ...
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