1. A computer-implemented method for representing an ontological information system for illness based on Chinese Traditional Medicine, the method comprising: a) generating, through a computer, ontological information regarding symptoms and associated illnesses in Chinese Traditional Medice in annotated form; b) providing to a user a graphic system of queries regarding symptoms for receiving user input into the computer; and c) including in the computer a semantic net that: i) converts the ontological information into logic representations, ii) receives user input response to the queries regarding symptoms, and iii) parses the illness(es) in Chinese Traditional Medicine associated with the user input symptom(s).