strict digraph
{
  node [fontname = "Droid Sans", shape=box, style="filled"];
  edge [fontname = "Droid Sans Bold", fontsize=9, arrowhead="empty"];
  What [label="What do you intend to provide\nwithin the ACOnet Identity Federation?"];
  //SP [label="Services only"];
  //IdP [label="Identities\n(and Services)"];
  SPACOnet [label="Are you an ACOnet NREN Participant?"];
  IdPACOnet [label="Are you an ACOnet NREN Participant?"];
  Part [label="Become ACOnet Participant"];
  SPAgm [label="Sign SP-Agreement", href="\L"];
  Zusatz [label="Sign Federation supplemental agreement"];
  //What -> SP -> SPACOnet;
  //What -> IdP -> IdPACOnet;
  What -> SPACOnet [label="Services\nonly"];
  What -> IdPACOnet [label="Identities\n(and Services)"];
  SPACOnet -> Zusatz [label="Yes"];
  SPACOnet -> SPAgm [label="No"];
  IdPACOnet -> Zusatz [label="Yes"];
  IdPACOnet -> Part [label="No"];
  Part -> Zusatz;
  {rank=same; SPACOnet IdPACOnet}
  {rank=same; SPAgm Zusatz}
}

• Federation SP-Agreement (for Service Providers)
• Federation supplemental agreement (for existing ACOnet participants only)