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Washington
Washington Database
The University of Washington Database Research Group is developing a 'Tukwila' system which "uses adaptive query processing techniques to efficiently deal with processing heterogeneous, XML-based data from across the Internet. The data integration system depends upon a mediated schema to represent a particular application domain and data sources are mapped as views over the mediated schema. The user asks a query over the mediated schema and the data integration system reformulates this into a query over the data sources and executes it. The system then intelligently processes the query, reading data across the network and responding to data source sizes, network conditions, and other factors. The Tukwila data integration system is designed to scale up to the amounts of data transmissible across intranets and the Internet (tens to hundreds of MBs), with large numbers of data sources
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