Preferential independence

From DDL Wiki

An attribute is preferentially independent from all other attributes when changes in the rank ordering of preferences of other attributes does not change the preference order of the attribute.

For example, let's say the two attributes for a car are color and style. Suppose a buyer prefers a red sports car over a black sports car. If the buyer also prefers a red SUV over a black SUV, then the color and style attributes are preferentially independent of each other.