Relative Placement

Two complex features may have isomorphic feature graphs, but the orientation of one simple feature relative to the other may be different, thereby giving a clue. Topologically, this is exemplified by the hole in the boss configurations of Figure 67.

Additionally, there exists a topologically isomorphic situation for welding beads and tuning bumps, where the former is a rib that tops another rib length-wise, and the latter crosses the top of another rib width-wise. Here, the local orientation of a simple feature with respect to another is important.