This figure illustrates the high-level structure of a CGNS database.

At the top is the base node of the CGNS database, labeled CGNSBase_t. Below CGNSBase_t are the following nodes.

Below the Zone_t node are the following nodes.

Additional nodes may also be below Zone_t.

Below the ZoneUnstruct_t node are the following nodes.

Additional nodes may also be below ZoneUnstruct_t.

Below the FlowEquationSet_t node are the following nodes.

Below the Family_t node are the following nodes.