The graph file gives a hierarchical description of a faulted circuit. However, the main purpose of this file is to provide an efficient mechanism for reporting compound break faults. A graph representation of a circuit is given with edges provided for possible breaks. A list of breaks is then given, specifying which edges are broken by each break. The effect of a break on the circuit can be determined by removing the affected edges from the circuit graph. All other types of faults are listed in this file as well, but more detailed listings can be found in other files.