The Internet presents numerous sources of useful information--telephone directories,
product catalogs, stock quotes, weather forecasts, etc. Recently, many systems have been …

Data integration is a pervasive challenge faced in applications that need to query across
multiple autonomous and heterogeneous data sources. Data integration is crucial in large …

We witness a rapid increase in the number of structured information sources that are
available online, especially on the WWW. These sources include commercial databases on …

The Internet presents numerous sources of useful information—telephone directories,
product catalogs, stock quotes, event listings, etc. Recently, many systems have been built …

Businesses today need to interrelate data stored in diverse systems with differing
capabilities, ideally via a single high-level query interface. W e present the design of a query …

Accessing many data sources aggravates problems for users of heterogeneous distributed
databases. Database administrators must deal with fragile mediators, that is, mediators with …

This paper presents a framework for data integration currently under development in the
Squirrel project. The framework is based on a special class of mediators, called Squirrel …

The database theory community, centered around the PODS (Principles of Database
Systems) conference has had a long-term interest in logic as a way to represent" data,"" …

Access to large numbers of data sources introduces new problems for users of
heterogeneous distributed databases. End users and application programmers must deal …

The exponential growth of the Internet has produced a labyrinth of documents, databases
and services. While almost any type of information is available somewhere, even expert …