Considerable progress has been achieved in the area of virtual database systems, but substantial problems still persist. In this paper we discuss two current research directions: ...
This paper describes the current state of RUgle, a system for classifying and indexing papers made available on the World Wide Web, in a domain-independent and universal manner. B...
Searching for medical information on the Web has become highly popular, but it remains a challenging task because searchers are often uncertain about their exact medical situation...
Currently a number of these on-line support systems for electronic contracting are under development. In this paper we develop a logical formalism to represent the content of busi...
Information system models commonly describe organizations in terms of the structure of the data they use, the organization of the processes they perform and the operations that wil...