Rule Impact of influence Formalization in N3 Rule1 If the patient is Pregnant, then Simple Urinary Tract Infection is an inadequate diagnosis The strength of influence between “Simple Urinary Tract Infection” and “Pregnant” is zero (no relationship between concepts in the case of this patient) (dco:Pregnantdco:SimpleUrinaryTractInfection) fl:sigma 0. Rule 2 If patient has Flank Pain THEN the patient may have a Complicated Urinary Tract Infection The strength of the relationship between Flank Pain and Complicated Urinary Tract Infection is positive and very very strong (numerical value=1) The strength of the relationship between Flank Pain and Complicated Urinary Tract Infection is positive and very very strong (numerical value=1)

Table 2: Example of Formalization of rules in N3.