Figure 5

Type C rules and type D rules in model #1. There are six types of rules (RA to RF) based on what kind of relation they represent between inputs and states. For example, RC (back window) describes how the facts/contexts change the states' values directly, and RD (front window) defines the relation between medication and affected states. The user-designer can add, delete and change rules, and also change the properties of rules such as rule name and rule weight. When working on "If" side or "Then" side, user-designer can add an element, or delete the right-most element, which is demonstrated helpful for designing rules. In the "If" part, several options are available to help define precise and flexible rules. These operations include: "AND" and "OR" operations, constraints (such as "NOT", "VERY", and "NOT VERY"). There is also a weight for each input element.