BW Bridge : The use of ...... is not permitted

Hello,

We are trying to implement some of the dataflows of an older BW system into BW Bridge.

One of the first things we are trying to implement is a routine in a transformation that reads the hierarchy table of an InfoObject to derive an attribute based on the position of the leaf in the hierarchy.

Unfortunately, use of tables, data elements, function modules is extremely restricted on BW bridge (and as I understand other cloud products). Only objects 'released' by SAP can be used in code and views, but this list is really short.

Surely, there must be a way around this?

In our case, not only are there thousands of lines of code that are unusable, I don't even see a way around it if the hierarchy table can't be read.