The SLam calculus is a typed -calculus that maintains security information as well as type information. The type system propagates security information for each object in four for...
This paper is part of a project to match real-world descriptions of instances of objects to models of objects. We use a rich ontology to describe s and models at multiple levels of...
Helly's theorem says that, if every d+1 elements of a given finite set of convex objects in Rd have a common point, there is a point common to all of the objects in the set. I...
XML data can be stored in different types of databases including Object-Relational Databases (ORDB). Using ORDB, we get the benefit of relational maturity and the richness of obje...
Apart from visualization tasks, three-dimensional (3D) data management features are not or only hardly available in current spatial database systems and Geographic Information Sys...