specifically dependent continuant attribute This is an abstraction of the kinds at the class level. In the use case, it is sometimes referred to with # operator as a class constraint like "#generic quality". In a common term, it would be called "attribute". Its instance is not equal to its value. The value itself belongs to "quality value". Its instance is still an attribute which refers to a specific quantity. Its instnace plays a quality role like length plays one's height as a quality role. Quality such as one's height, one's weight, etc. are roles, and hence must be defined in the context of respective contexts(entities). Therefore, they are not defined as basic type like length, weight, etc. See "physical" in which a most generic quality is defined. Quality in DOLCE corresponds to quality role type in YAMATO. This is why "quality" is invisible in YAMATO in spite of it knows "quality". YAMATO Ontology generic quality