This paper analyzes and evaluates the different kinds of representation methods, describes the concepts of blackboard model,knowledge source,and blackboard framework,and gives a rigorous BNF definition to the blackboard framework.

• 文中还对目前各种知识表达方法进行了评价,对黑板模型、知识源、黑板框架的概念进行了描述,并对黑板框架给出了严格的BNF定义。