Building an Embedded Knowledge - basedApplication Using

Knowledge-based application development for embedded systems requires an approach diierent from that used in other environments. This is due to the nature of embedded systems which amongst other characteristics, have strong reliability requirements and aim to optimize the use of underlying hardware resources. Any approach that satisses these constraints must be supported by the development tools. In this paper, we show how the XE programming environment supports embedded knowledge-based software development. The key idea is the integration of the rule-based paradigm with abstract data types in the same programming language environment. We illustrate the ideas through XEDA, an embedded knowledge-based application developed at Nokia Telecommunications to support the diagnostics function of the DX 200 digital switching system.