This chart shows a typical CGNS file in tree form. At the top is the Root node, with child nodes CGNSLibraryVersion_t and CGNSBase_t. Below CGNSBase_t are the following child nodes.

Below one of the Zone_t nodes are: Below the Elements_t node is a DataArray_t node named ElementConnectivity. Below the GridCoordinates_t node are two DataArray_t nodes named CoordinateX and CoordinateY. Below the FlowSolution_t node is a GridLocation_t node named GridLocation, and two DataArray_t nodes named Density and Pressure.