Metacat

"The right way to do this would be to decouple the metadata entry from
the filter that controls whether a given entry shows up in the registry.
We've been experimenting with some ways to do this through 'semantic
annotations' that are maintained separately from the rest of the
metadata. This would allow us to retroactively label data packages with
annotations that could control which skin they show up in. It still
doesn't solve the maintenance problem (for each new registry skin that
we create, we need to annotate all past data packages that we want to
show up in the skin). I'm still not sure how to deal with that issue."