Suk Kyoon Lee

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We have previously proposed an extended relational data model with the objective of supporting uncertain information in a consistent and coherent manner. The model, which can represent both uncertainty and imprecision in data, is based on the Dempster-Shafer (D-S) theory of evidence, and it uses bel and pls functions of the theory, with their definitions(More)
Although path expressions in object-oriented query languages have materialized the capability of concisely manipulating the nested structures, their presence in query expressions require complex semantic considerations. However, none of currently existing visual query languages models such complex query expressions in a concise and intuitive way partly due(More)
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