As an example, consider a case that has two brick shaped elements, one material, no nodal patches, a different face patch on each external face and no element patches. The complete geometry specification file would be defined as in the below example.
2 12 11 2 Header line. 0.0 0.0 0.0 0 0 0 Points definition section. 0.0 1.0 0.0 0 0 0 0.0 1.0 1.0 0 0 0 0.0 0.0 1.0 0 0 0 2.0 0.0 0.0 0 0 0 2.0 1.0 0.0 0 0 0 2.0 1.0 1.0 0 0 0 2.0 0.0 1.0 0 0 0 4.0 0.0 0.0 0 0 0 4.0 1.0 0.0 0 0 0 4.0 1.0 1.0 0 0 0 4.0 0.0 1.0 0 0 0 4 Faces definition section. 1 2 3 4 0 1 4 1 5 6 2 0 2 4 2 6 7 3 0 3 4 3 7 8 4 0 4 4 1 4 8 5 0 5 4 5 6 7 8 0 0 4 5 9 10 6 0 6 4 6 10 11 7 0 7 4 7 11 12 8 0 8 4 5 8 12 9 0 9 4 9 10 11 12 0 10 6 Elements definition section. 1 2 3 4 5 6 1 0 6 6 7 8 9 10 11 1 0 0 0 0 0 0 2 Adjacency definition section. 1 0 0 0 0 0