/DISCO [info|items] [jid|.|./resource] [node]

Sends service discovery requests to specified jid (use . to specify current byddy's jid) and, optionally, to specific node of that jid.

/disco info [jid|.|./resource] [node]
 Sends disco#info request.
/disco items [jid|.|./resource] [node]
 Sends disco#items request.

Note: unlike other commands, here you can use ./resource notation.