Grid technology has evolved over the past several years to provide the services and infrastructure needed for building "virtual" systems and organizations. With this Gri...
Today companies outsource part of the service provisioning to other companies that are not part of their core competence. Companies can use current workflow management systems to ...
Although there is a huge amount of work and valuable proposals about agent oriented software engineering, it seems that the paradigm has not been fully accepted yet by software ind...
We investigate the problem of refining SQL queries to satisfy cardinality constraints on the query result. This has applications to the many/few answers problems often faced by da...
Answering queries over ontologies is an important issue for the Semantic Web. Aggregate queries were widely studied for relational databases but almost no results are known for ag...
Diego Calvanese, Evgeny Kharlamov, Werner Nutt, Ca...