6.7.4 Editor for Data Field Collection in Hierarchical Field Collection
Hierarchical field collections can contain data field collections. In this case, a combination of the data field editor and collection editor is displayed in the same dialog window, when adding a new entry. The rules for each entry, when a data field collection is used in a hierarchical field collection, applies as for the respective editor.
For example, when a data field set collection is used in a hierarchical field array collection, each entry consists of a combination of the hierarchical field collection and any of the entries in the data field collection, see Figure 63.
Pressing the Add button brings up an editor consisting of a combination of a data field set collection and a hierarchical field array collection.
The values in the data field collection are never displayed in the hierarchical collection, they can be seen by pressing Edit when an entry is selected, see Figure 64.

