value = pMe.Pm("/data/#vars/Temperature/#ext/al").Max1;//orvalue = pMe.Pm("/data/#vars/Temperature").Extension("al").Max1;//orvalue = pMe.Pm("/data").Item("Temperature").Extension("al").Max1;
value = pMe.Pm("/data/#vars/Temperature/#ext/al").Max1'orvalue = pMe.Pm("/data/#vars/Temperature").Extension("al").Max1'orvalue = pMe.Pm("/data").Item("Temperature").Extension("al").Max1
$.expr("pVar.Extension('al').Max1")