Under a type of query transformation referred to herein as join factorization, the branches of an UNIONUNION ALL query that join a common table are combined to reduce accesses to the common table. The antenna elements are formed on a layer of first dielectric having conducting material on both the first and second sides of the layer of first dielectric, such as a printed circuit board. The system, method, and computer program generate a plurality of ontologies associated with the applications. In addition, the radiation field guiding optics comprise at least one deviating unit which, out of at least one of the branches emerging from the solid body, forms a branch which enters the solid body and which has a trajectory that differs locally from that of said emerging branch. If the primary queue contains a work element having a priority greater than or equal to the priority bar, then the work element is processed.