DJENAOUI, Abdelatif2018-01-312018-01-312017http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/1963This work is a clinical decision support system (CDSS) consists to help physicians in medical diagnosis process and decision-making, using medical ontologies SYMP (symptoms) and DOID (diseases), and patient’s record ontology which is created from the patient history stored in a database. Our approach depends on: - Linking diseases to its symptoms and generate a new ontology (DIAGNOSTIC). - Creating a new ontology from the patient’s database which contain their records (RECORD). - Infer more signs from RECORD ontology using SWRL (Rules). - Follow medical diagnostic procedures, and help physician to diagnose the disease.enDiagnostic, Medical Diagnosis, Ontology, Disease, Symptom, DOID, SYMP, SWRL.Thesis