For most nodes, the XML view contains a decent view of the actual content of the node. However, it doesn't work quite like you might want for nodes where the user-visible content of the node doesn't match up with what's actually in the DB. Fortunately, for most of the major superdocs, there's a xml ticker seperate from the XML view.

Unfortunately, the XML view is set up to only give the data in the DB in a fairly literal translation, and to appear for all nodes, regardless of if the XML view will give useful information.