Tree main structure¶
A CGNS tree has a topological structure. The branches of the tree are representing the actual topological divisions of your computation.
The skeleton¶
The support of your computation data is the grid (or grids). The grid can be structured and/or unstructured. The way your grid is cut into parts defines the skeleton of your tree. The branches that mainly holds the data are the Base, Zone, Elements, Connectivity and Boundary conditions nodes.
A CGNS is a tree. A tree is a node which has node has children. The top node of a CGNS/SIDS tree has the CGNSBase_t type.