Expert knowledge must be coded into a form that can be processed by an inference engine. A useful way to represent knowledge is in the form of classes, attributes and values. TEA's development environment allows you to create Classes, Attributes and Values. An class is a person, place or thing or mental concept. Classes have attributes that describe common properties of its members.
Attributes have values.
They are all possible values of an attribute decision. The decision attribute in turn describes a common property of a person. Subclasses Sometime it makes sense to create a subclass of person . A subclass implies a specialization of its superclass. For example, a salesperson inherits all the attributes of person and defines other attributes such as customers, and commissions that describe a salesperson.