Expert System

   *Knowledge Base*

🔶 Knowledge base comprises a database of facts and a rules base

🔶A database of facts is built up by the engineer on information and knowledge of experts

...also data from databases that may exist for the topic

🔶Knowledge base editing software/knowledge base editor enables the

knowledge engineer to edit rules and facts within the knowledge base

*Rule Base*

🔷Rules base is a set of rules which are usually of the form IF . . . THEN

🔷The shell often includes the user interface, explanation system, inference

engine and knowledge base editor

*Inference Engine*

🔶Inference engine is the reasoning part of the system

🔶The method used by the inference engine involves the use of forward chaining,

backward chaining or a combination of both

*User Interface*

🔷 User interface is how the computer interacts with the user, displaying questions

and information on a screen/enables the user to type in answers to the

questions

Explanation system

 explains to a user the chain of reasoning used to arrive at

a particular conclusion.

 via Steno https://play.google.com/apps/testing/com.manco.steno