Numbers server already resolves (ultimately) to RDF
low-hanging fruit: adding some known metadata properties to the leaves
high-hanging fruit: disentangling the many sparse relationships
What if rather than having any organizational center for the index, we reorganized things around a more abstracted graph relating Objects (inventory numbers), Texts (citations), and CatalogEntries (metadata records, these might be Editions)
Say we have two more relationships: METADATA ore:describes TEXT/OBJECT, and METADATA ore:similarTo METADATA
Number Server lets you drill down through identifier hierarchies as aggregates, OR lets you see a graph centered on a particular URI.
More at some indeterminate point in the future.