A Disease-Symptom Semantic Net(DSSN)for misdiagnosis prompt is constructed.First,symptom words are recognized from medical corpus,and a symptom ontology based on semantic relations between symptom words is established.Then,the relations between diseases and symptoms and the misdiagnosed relations between diseases were test mined and extracted to construct DSSN.DSSN contains Disease Ontology(DO),new established symptom ontology,misdiagnosed relations between diseases and differential diagnosis knowledge.Fina...