Let's also not forget the Linked Data idea. You find a node in an RDF graph that you're interested in? Follow the URI that is its id and get more RDF describing

Let's also not forget the Linked Data idea. You find a node in an RDF graph that you're interested in? Follow the URI that is its id and get more RDF describing the node, and so on. A web of data. We're not there yet, but the number of RDF-ized resources is growing.