that class of which this subject is a particular example and member; different from P279 (subclass of); for example: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform)
type to which this subject corresponds/belongs. Different from P279 (subclass of); for example: K2 is an instance of mountain; volcanoes form a subclass of mountains, and the volcano is a type (instance) of volcanic landform