<?xml version='1.0'?>
-<!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd">
+<!DOCTYPE platform SYSTEM "https://simgrid.org/simgrid.dtd">
<platform version="4.1">
<!-- This is an example for a fat tree cluster.
This is taken from figure 1/ b/ of the paper "D-Mod-K Routing Providing on-Blocking Traffic for Shift Permutations on