How to load hierarchy from DSO

Hey specs !

I've tasked to create hierarchy within SAP BW. I have some experience loading hierarchy from flatfile therefore I've created a hierarchy with exactly the same structure as would in excel datasource but I keep failing to load it into the infoobject hierarchy table.

Is there any standard way to load hierarchy from DSO ? I'm quite flexible so any advice is much appriciated .
SAP BW 7.4

Thanks Andras