This diagram illustrates the hierarchical structure in a CGNS file for a 1-to-1 zone interface, starting with the ZoneGridConnectivity_t node.

The ZoneGridConnectivity_t node has the following characteristics.

The ZoneGridConnectivity_t node may have multiple child nodes, one of which specifies that the interface has 1-to-1 connectivity, as follows.

The GridConnectivity1to1_t node in turn has the following child nodes.