Briefly, in accordance with one embodiment of the invention, an object may be utilized to define, communicate, and/or control a spatial relationship between at least two other objects. Such an object may be somewhat analogous to a spring in that a minimum margin between the two other objects may be defined to allow the two other objects to approach one another until the minimum margin is reached, and a flexible margin may allow movement of the two other objects within the flexible margin relative to each other, optionally up to a maximum distance of separation.