The development of the Internet in recent years has made it possible and useful to access
many different information systems anywhere in the world to obtain information. While there …

We review the use on ontologies for the integration of heterogeneous information sources.
Based on an in-depth evaluation of existing approaches to this problem we discuss how …

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 paper considers the problem of merging several belief bases in the presence of integrity
constraints and proposes a logical characterization of operators having a majority behaviour …

Abstract TSIMMIS—The Stanford-IBM Manager of Multiple InformationSources—is a system
for integrating information. It offers a datamodel and a common query language that are …

There has been an explosion in the types, availability and volume of data accessible in an
information system, thanks to the World Wide Web (the Web) and related inter-networking …

Despite considerable advancements in the area of access control and authorization
languages, current approaches to enforcing access control are all based on monolithic and …

Policies are pervasive in web applications. They play crucial roles in enhancing security,
privacy and usability of distributed services. There has been extensive research in the area …

The widespread use of Internet-based services is increasing the amount of information (such
as user profiles) that clients are required to disclose. This information demand is necessary …