OTBI Subject Area Contents Listing (metadata)

How do we provide our users with a user-friendly listing of the contents in each Subject Area?

Or, at least, how or where do we get the data necessary to build one? This is for building awareness of what data is available for each Subject Area and where it can be found within the hierarchy. The data lineage worksheet only goes so far, presumably because it is intended to solve a different problem. And it would be a considerable work effort to construct -- and maintain -- by hand.

For example, what appears in the UI as:

Would be represented (abbreviated)