Save these to disk and have a look at them in your favourite XML or text editor.
Metadata for NITE's simple example (you may also want to see the data it describes - 5K zip)
Metadata for the Maptask corpus (here is a single maptask observation - 165K zip)
Metadata for the Smartkom corpus (simple corpus case) (here's a single Smartkom interaction file - 15K XML)