Fig. 2
From: Dione: An OWL representation of ICD-10-CM for classifying patients’ diseases
Part of the A00_B99 category hierarchy included in the Diseases category displayed on the Protegé software interface. A00_B99 is a subclass of the main class Diseases. According to the ICD-10-CM structure, A00_A09 is a subclass of A00_B99 and A00_0, A00_1 and A00_9 are subclasses of A00_A09. According to the semantics of OWL, if x is an instance of A00_9, it is also an instance of A00_B99 and therefore, it is also an instance of A00_A09