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 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 .