Changes
#* '''TARGETTYPERIGHT''': reference to the MetaClass of the left object of the relation
#* '''RELATIONDATA''': reference to the MetaClass used as template for the relational data
#: either by
#* dragging and dropping a MetaClass object onto the cell
#* selecting the desired MetaClass from the dialog appearing after double-clicking the cell
# It is recommended to set at least name and description
# Save the changes with {{key press|Ctrl|S}} or the save command
