Exploration on Establishing Syndrome Factor Differentiation System Based on Directed Graph Model

"Symptom set" was changed into "combined set of syndrome factors" by exploring the mapping relationship between symptom and syndrome factors， among which the ones meeting the definition of pathogenesis were chosen to further form the "pathogenesis set" under the ISOR combination principle， so as to build a new syndrome factor system of "symptom collection-syndrome factor collection-pathogenesis collection"， which is not only beneficial to perfect the syndrome factor system， but also a new thought for applying mathematics and computer science to Chinese medicinal research.