digraph stack
{
  compound=true;
  splines=line;
  rankdir="LR";
  node [
    shape="box";
  ]

  subgraph cluster_2 {
	  label="Kernel";
	  event0 [label="/dev/input/event0"];
	  event1 [label="/dev/input/event1"];
  }

  subgraph cluster_0 {
	  label="Compositor process";
	  libinput [label="libinput context 1"];
  }

  subgraph cluster_1 {
	  label="libinput debug-events";
	  libinput2 [label="libinput context 2"];
  }

  stdout;

  client [label="Wayland client"];

  event0:e -> libinput:w;
  event1:e -> libinput:w;
  event0:e -> libinput2:w;
  event1:e -> libinput2:w;
  libinput -> client [ltail=cluster_0 label="Wayland protocol"];
  libinput2 -> stdout [ltail=cluster_1];
}