As originally conceived, the World Wide Web was intended for the purpose of sharing information. Many websites realise this aim by publishing pages from a data repository which su...
In this paper we present PAMINA (Privilege Administration and Management INfrAstructure), a privilege management system using authorization certificates. Our system supports distr...
We examine schema mappings from a type-theoretic perspective and aim to facilitate and formalize the reuse of mappings. Starting with the mapping language of Clio, we present a ty...
Access to distributed databases containing tuples collected about mobile physical objects requires information about the objects’ trajectories. Existing access control models ca...
Information systems often require combining datasets available in different formats, and geographical information systems are no exception. While semantic technologies have been u...