This diagram illustrates the layout of the upper-level nodes in the CGNS file for the two-zone structured grid example.
Just below the root node of the ADF file are two nodes with the following characteristics.
Just below the CGNSBase_t node are the two Zone_t nodes.
At the next level, each of the Zone_t nodes have the following four child nodes.
The GridCoordinates_t, FlowSolution_t, and ZoneGridConnectivity_t nodes have child nodes of their own, described in the next three figures.
Note that the names of the CGNSBase_t, Zone_t, and FlowSolution_t nodes are user defined.