The notion of Federated Data Warehouse Architecture was suggested for various reasons: bigger autonomy of divisions in an organization, better adaptation to user needs, bigger effi...
In the paper we investigate the problem of analysis of time related information systems. We introduce notion of temporal templates, i.e. homogeneous patterns occurring in some peri...
With the growing popularity of XML there is a need not only to describe the structure of XML data but also its semantics. For the conceptual modelling of XML we can use existing c...
A catalogue holds information about a set of objects, typically classified using terms taken from a given thesaurus, and described with the help of a set of attributes. Matching a ...
We use information entropy measure to extend the rough set based notion of a reduct. We introduce the Approximate Entropy Reduction Principle (AERP). It states that any simplificat...