ES/AG: An Expert System Generating Environment and Its Use in Engineering Applications
The ES/AG (Expert System/Application Generator) Environment consists of a set of languages and tools for creating expert systems from a task specific knowledge base. By providing the ability to express a wide range of data types, complex relationships among data elements, and knowledge in an easy frame-like format, ES/AG satisfies many of the engineering needs that other data management systems cannot, 
ES/AG originated from a system used to configure and order 5ESS* switching equipment. By generalizing many of the principles behind this system, ES/AG is able to be applied to a wide range of task domains. Within AT&T Bell Laboratories, ES/AG has been used to create several successful expert systems in various engineering areas. Prototype models for some of these systems will be discussed in this paper. In addition, many of the practical features that make ES/AG applicable to engineering problems will be presented.
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