What is a dependent attribute?
The ability for some attributes to control the behavior of other attributes is known as attribute dependency. An attribute dependency rule defines the effect that a source attribute value has on one or more target attribute values.
What actions can an action-based dependency rule do?
In an action-based rule, you configure an entry condition and one or more actions to be taken based on the entry condition. Each action can either set an attribute's value or make it required for a user to supply a value for an attribute.