New Smack Terminology and Base Class Hirarchy

Old Smack	New Smack	Notes
Packet	Stanza (Smack 4.1)	Packet is not an XMPP term
PacketExtension	Extension Element (Smack 4.2)	So is packet extension
Service name	XMPP domain (Smack 4.2)	XMPP domain is more verbose
PacketFilter	StanzaMatcher (Smack 4.3)	Filter is ambiguous: Does the filter withhold or pass?

New class hierarchy (Smack 4.3)

                                            XmppStream

               XmppClientConnection             (XmppS2cConnection)    (XmppS2sConnection)   (XmppComponentConnection)
               [a XMPP C2S stream]

XmppClientTcpConnection         XmppClientBoshConnection