We present typing rules for the Web query language Xcerpt. The rules provide a descriptive type system: the typing of a program is an ation of its semantics. The rules can also be ...
Abstract. The paper presents a new look-ahead scheme for backtracking search for solving constraint satisfaction problems. This look-ahead scheme computes a heuristic for value ord...
We discuss how mobile agents, moving in the Internet from node to node, can communicate with each other by forwarding messages in a robust way. As a solution, we present the genera...
Several formalisms have been proposed for qualitative reasoning about regions and their topological relations in space. These formalisms, based on pairwise relations, do not allow...
Information graphics (such as bar charts and line graphs) are an important component of many documents. Unfortunately, these representations present serious access challenges for ...