(XMPP is a protocol for instant messaging developed on the basis of XML, and has now been recognized as an Internet standard protocol (RFC3920 and RFC3921) by the IETF. XMPP is a debunked, standard, secure, adaptable and easily extensible instant messaging protocol. The ultimate goal of XMPP is to end the instant message sender regardless of what kind of instant messaging software the other party is using, that is, to end the intercommunication between heterogeneous systems.)