Parting thoughts…
Profile places emphasis on “object modeling” and structural characteristics of the digital object
The lack of common data standards is the key barrier to interoperability. METS Profiles address that problem.
Registering profiles with the METS Editorial Board is a good thing.
A METS profile-aware validator is needed. We are working on it.
Exposing METS documents for OAI harvesting is a logical next step…