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Professor Deutsch's research centers around the XML (Extended Markup Language) and the efficient and effective integration of heterogeneous data from multiple sources. XML is widely accepted as the standard for data exchange between businesses on the Internet. However, most corporations publish only selected portions of their proprietary business data as XML documents, and even then only virtually, by exposing an interface against which XML queries can be formulated. This interface allows the user to query the data without having to know where exactly it is physically stored, or under what form. In order to be answered, user queries must be "reformulated" as queries on the actual proprietary data. The MARS (Mixed and Redundat Storage) System solves the reformulation problem in a very general setting that allows mixed (XML and relational) storage for the proprietary data and takes advantage of redundancies in the storage (materialized views, indexes and caches) that can enhance performance. The underlying reformulation algorithm is guaranteed to find a reformulation if one exists. Moreover, this algorithm achieves optimal complexity bounds under reasonable restrictions on the expressive power of user queries
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Gábor Szárnyas, Brad Bebee,Altan Birler,Alin Deutsch,George Fletcher,Henry A. Gabb,Denise Gosnell,Alastair Green,Zhihui Guo, Keith W. Hare,Jan Hidders,Alexandru Iosup,
CoRR (2023)
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Alin Deutsch, Nadime Francis, Alastair Green, Keith Hare,Bei Li,Leonid Libkin, Tobias Lindaaker,Victor Marsault,Wim Martens, Jan Michels,Filip Murlak, Stefan Plantikow,
arXiv (Cornell University) (2022)
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Proceedings of the 2019 International Conference on Management of Data (2019)
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