hendrik on 28 Jul, 2017 08:38 AM
sorry for the very late reply.
I can see how this is desirable. To a degree beaTunes 5 already supports genre hierarchies, as it has a built-in genre graph, which is used for matching and playlist building. Also, beaTunes 5 displays a top genre next to the actual genre name. E.g. Alternative & Punk (Rock). The label here is Alternative & Punk, the hint (Rock) is added by beaTunes. But at this point you cannot search for this, which is what you want, if I understand you correctly.
I'll add an entry to the todo list, but given that v5 was just released, it will take a long time until I can add new features.