Figure 1. Import schema of the ontologies used in OntoPharma. For modeling drug-related knowledge, 3 ontologies have been developed (Drugs, DSS, and Local pharmacy). Each ontology has been divided into 2 parts. The first part provides concepts and classes (also known as T-Box), and the second provides the instances of these concepts (also known as A-Box). The three ontologies are interconnected, as shown in Figure 1. DSS: Decision support system.