Original: An attribute-value system is distinguished from a simple "feature list" representation in that each feature in an attribute-value system may possess a range of values (e.g., feature below, which has domain of), rather than simply being present or absent.
Simplified: An attribute-value system is distinguished from a simple "feature list" representation in that each feature in an attribute-value system may possess a range of values (e.g., feature below, which has domain of), rather than simply being present or absent