Non-monotonic enumeration of layout alternative [i.e., alternatives] using the LOOS operators

Abstract: "This report develops a control function for application of the generation rules used in the LOOS system (Flemming et al. 88a) that does not keep the spatial relations between rectangles invariant. Such a control function is preferable to the one used in past versions of LOOS when certain forms of user interaction with the generation process are desired."