The planning domain language PDDL2.1, used in the 3rd International Planning Competition, has sparked off some controversy in the planning community as researchers consider its exp...
With the growing interest in modular ontology languages to address the need for collaborative development, integration, and use of ontologies on the Web, there is an urgent need fo...
XQuery is known to be a powerful XML query language with many bells and whistles. For many common queries we do not need all the expressive power of XQuery. We investigate the eff...
Jan Hidders, Stefania Marrara, Jan Paredaens, Roel...
Abstract. We explore the expressive power of the formalism called Natural Operational Semantics, NOS, introduced by Burstall and Honsell for defining the operational semantics of ...
Abstract. In this paper we investigate the ways in which a fixed collection of valued constraints can be combined to express other valued constraints. We show that in some cases a ...
David A. Cohen, Peter Jeavons, Stanislav Zivn&yacu...