Artificial Intelligence And Expert Systems
Knowledge base
A knowledge base is the nucleus of the expert system structure. The knowledge base may be a specific diagnostic knowledge base compiled by a consulting firm, and the end user may supply the problem data. Knowledge base is not a database. The traditional data base environment deals with data that have a static relationship between the elements in the problem domain. Knowledge engineers, who translate the knowledge of real human experts into rules and strategies, create it. These rules and strategies can change depending on the prevailing problem scenario. The knowledge base provides the expert system with the capability to recommend directions for user inquiry. It is usually stored in terms of if–then rules.
The knowledge base of expert systems contains both factual and heuristic knowledge. Factual knowledge is that knowledge of the task domain that is widely shared, typically found in textbooks or journals, and commonly agreed upon by those knowledgeable in the particular field.
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