Data sharing efforts increasingly contribute to the acceleration of scientific discovery.
Neuroimaging data is accumulating in distributed domain-specific databases and there is …

The Web is causing a revolution in how we represent, retrieve, and process information Its
growth has given us a universally accessible database-but in the form of a largely …

The problem of answering queries using views is to find efficient methods of answering a
query using a set of previously materialized views over the database, rather than accessing …

The popularity of the World-Wide Web (WWW) has made it a prime vehicle for disseminating
information. The relevance of database concepts to the problems of managing and querying …

We consider the problem of building data integration systems when the data sources are
webs of data, rather than sets of relations. Previous approaches to modeling data sources …

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The article investigates XML document specifications with DTDs and integrity constraints,
such as keys and foreign keys. We study the consistency problem of checking whether a …

Generating query-answering plans for data integration systems requires to translate a user
query, formulated in terms of a mediated schema, to a query that uses relations that are …

Integrity constraints are useful for semantic specification, query optimization and data
integration. The ID/IDREF mechanism provided by XML DTDs relics on a simple form of …

The Strudel system applies concepts from database management systems to the process of
building Web sites. Strudel's key idea is separating the management of the site's data, the …