The development of many knowledge discovery methods (see [14], [7], [16]) provided us with good foundations to build a kd-Query Answering System (kdQAS) for Distributed Knowledge Systems (DKS). By DKS we mean a number of autonomous processing elements (called knowledge systems) that are interconnected by a computer network and that cooperate in their assigned tasks. A knowledge-system we see as a relational database coupled with a discovery layer which is simplified in this paper to a set of rules. Querie