We're still toying around data categorization. Files are dull, hierarchies are almost meaningless since they require arbitrary ordering. DB-oriented FS aren't there yet (although BeOS found a sweet spot it seems, their c++ API has some ORM feel). '''Semantic''' still in progress.
The solution is barycentric: A network a loosely coupled types as a basis for ontology/semantic network in with `atomic` artefacts can be seen/search through. Could even be used to feed dataflow-like graphs for user to manipulate their data. Just like unix pipes but typed, and with an interactive side effect `free` GUI.