Table 2.

Example of a formal definition for the MedDRA terms Abdominal abscess and Pharyngeal abscess

MedDRA terms	Disorders	Body structure
	Type of abnormality	Anatomical localization
Abdominal abscess	Abscess morphology	Abdominal cavity structure
Pharyngeal abscess	Abscess morphology	Neck structure

The terms are semantically decomposed into their elements from Disorders and Body structure axes.