This example shows an unstructured grid representation, and the use of a subrepresentation to support a cell-node property which is discontinuous from cell to cell, despite the underlying grid being unfaulted. Figure 11.19.9-1 shows a very simple grid; Figure 11.19.9-2 , Figure 11.19.9-3 , Figure 11.19.9-4 are the class diagrams and Figure 11.19.9-6 , Figure 11.19.9-7 , and Figure 11.19.9-8 are the instance diagrams showing the data.