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Journals and Conferences
If XML is to play the critical role of the lingua franca for Internet data interchange that many predict, it is necessary to start designing and adopting benchmarks allowing the comparative performance analy sis of the tools being developed and proposed. The effectiveness of existing XML query languages has been studied by many who focused on the comparison… (More)
Semi structured data is becoming increasingly important with the introduction of XML and related languages and technologies The recent shift from DTDs document type de nitions to XML Schema for XML data highlights the importance of a schema de nition for semi structured data applications At the same time there is a move to extend semi structured data models… (More)
Computer science students benefit from working in teams. But working in teams is difficult and team skills are seldom taught. In this paper, we describe mechanisms we put in place for supporting team processes in our group project course. We evaluate the mechanisms and extract guidelines that are useful for supporting team dynamics.
Data mining is generally considered the extraction and analysis of information from databases. With the rapid growth of XML data available online, mining XML data from the web is becoming important. In support of this trend, several encouraging attempts at developing methods for mining XML data have been proposed. However, efficiency and simplicity are… (More)
We present declarative and procedural semantics for a deductive object-oriented language, Gulog. The declarative semantics is based on preferred minimal models. We describe both bottom-up and top-down query evaluation procedures and show that they are sound with respect to the declarative semantics. The results contribute to our understanding of the… (More)
Clustering is an important data mining task and has been explored extensively by a number of researchers for different application areas such as finding similarities in images, text data and bio-informatics data. Various optimization techniques have been proposed to improve the performance of clustering algorithms. In this paper we propose a novel algorithm… (More)
Over the past decade, a large number of deductive object-oriented database languages have been proposed. The earliest of these languages had few object-oriented features, and more and more features have systematically been incorporated in successive languages. However, a language with a clean logical semantics that naturally accounts for all the key… (More)
We present a simple model for deductive object-oriented systems with inheritance and overriding. In this model we deene a declarative semantics based on preferred minimal models, we present bottom-up and top-down procedures for query evaluation, and we note that these procedures are sound with respect to the declarative semantics.
If XML is to play the critical role of the lingua franca for Internet data interchange that many predict, it is necessary to start designing and adopting benchmarks allowing the comparative performance analysis of the tools being developed and proposed. The effectiveness of existing XML query languages has been studied by many, with a focus on the… (More)