There are a bazillion digital library metadata formats, and it would be nice to be able to convert between them. There are many different crosswalks between various formats. As you might imagine the real difficulty lies in the semantic mismatches, not just the syntactic mismatches.
A resulting program would have to have a batch engine so that it could be driven by CGI processes, as well as function as an interactive tool. There'd have to be well defined ways to add and edit the conversion rules for formats.
Must be able to be driven by a GCI process/script. Would like a means to support editing of conversion rules.