streaming replication different versions

Hi,

on release 10, I remember reading something like: streaming replication is
NOW upward compatible.
which could be understood as: its possible to have a master in rel 10 and a
slave in rel 11.

Can someone confirm (or not !) this ?

if true, is the following scheme possible:
a master and a slave in same rel (10/11/12/13/14?)
1) stopping the slave
2) upgrading the slave to rel+1
3) restarting the slave
4) stopping the master and promoting the slave
5) upgrading the ex master
6) restarting it as slave
bingo version upgrade without stopping production.

what about the time line of the upgraded slave (step 2 ) ??

thanks,

Marc MILLAS
Senior Architect
+33607850334
www.mokadb.com