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Title: Visual Stratification of Defeasible Logic Rule Bases
Author(s): E. Kontopoulos, N. Bassiliades, G. Antoniou.
Availability: Click here to download the PDF (Acrobat Reader) file (8 pages).
Keywords: defeasible logic, visual representation, semantic web, reasoning.
Appeared in: Proceedings of the 19th IEEE International Conference on Tools with Artificial Intelligence (ICTAI), IEEE, pp. 238-245, Patras, Greece, 2007.
Abstract: Logic and proofs constitute key factors in increas-ing the user trust towards the Semantic Web. Defeasi-ble reasoning is a useful tool towards the development of the Logic layer of the Semantic Web architecture. However, having a solid mathematical notation, it may be confusing to end users, who often need graphical trace and explanation mechanisms for the derived con-clusions. In a previous work of ours, we outlined a methodology for representing defeasible logic rules, utilizing directed graphs that feature distinct node and connection types. However, visualizing a defeasible logic rule base also involves the placement of the mul-tiple graph elements in an intuitive way, a non-trivial task that aims at improving user comprehensibility. This paper presents a stratification algorithm for visu-alizing defeasible logic rule bases that query and rea-son about RDF data as well as a tool that applies this algorithm.
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