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Integrating Semiformal and Formal Methods in Knowledge-Based Systems Development




Published: 1994

Buchtitel: Proceedings of the 3rd Japanese Knowledge Acquisition Workshop JKAW'94 (Hatoyama, Japan, Nov. 7-9)
Seiten: 73-87
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BibTeX

Kurzfassung
The paper describes a development approach for knowledge-based systems (KBS) combining semiformal and formal techniques for specification and design. For the semiformal representation we use a hypermedia-based formalism which serves as a communication basis between expert and knowledge engineer during knowledge acquisition. The semiformal knowledge representation is the basis for formalization, resulting in a formal and executable model of expertise specified in the Knowledge Acquisition and Representation Language (KARL). In the design phase, this representation is enriched by additional language primitives which focus on issues of realization and which facilitate the mapping of the model of expertise to the implementation environment. A smooth transition from semiformal to formal specification and further on to design is achieved as all the description techniques rely on the same conceptual model to describe the system. Thus, the system is thoroughly documented at different description levels, each of which focuses on a distinct aspect of the entire development effort. Traceability of requirements is supported by linking the different formalisms to each other.

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