read here for some more information :-
http://www.iprocon.de/wp-content/uploads/2012/11/A1_ESS-MSS_best_practise_and_improvements-PartI.pdf
read here for some more information :-
http://www.iprocon.de/wp-content/uploads/2012/11/A1_ESS-MSS_best_practise_and_improvements-PartI.pdf