I came here expecting to see how to do this with CouchDB. It's already been done a couple of times. CouchDB provides data synchronization protocols and the si

I came here expecting to see how to do this with CouchDB. It's already been done a couple of times. CouchDB provides data synchronization protocols and the simple rules for what acceptable incoming data looks like. Properties within the documents define all of your "labels" and any other features you might find interesting (which are later trivially indexed for retrieval).