Parent:IDataObject

The data structure in onion.net is built up in a tree structure. This means there is a root data object and further data objects can be created underneath it. In the schema management of onion.net, it is defined which data objects can be created underneath which types.

Due to the tree structure, each data object has exactly one superordinate data object. The only exception is the root data object. With this data object, the only value returned is NULL.