xmpp:user@host?message xmpp:user@host?message&subject=hi&body=Hello%20World&thread=abc123 xmpp:user@host?presence xmpp:user@host?presence&show=dnd&status=taking%20a%20nap xmpp:user@host?subscribe xmpp:user@host?subscribe&type=subscribe xmpp:user@host?subscribe&type=subscribed xmpp:user@host?subscribe&type=unsubscribe xmpp:user@host?subscribe&type=unsubscribed