-"<!DOCTYPE platform SYSTEM \"http://simgrid.gforge.inria.fr/simgrid.dtd\">\n"
-"<platform version=\"3\">\n"
-" <process host=\"c-0.me\" function=\"tracker\"><argument value=\"%d\"/></process>\n" % end_date)
+"<!DOCTYPE platform SYSTEM \"http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd\">\n"
+"<platform version=\"4\">\n"
+" <process host=\"node-0.acme.org\" function=\"tracker\">\n"
+" <argument value=\"%d\"/>\n </process>\n" % end_date)