theorem
  for dl being Data-Location of R ex i being Nat st dl = dl.(R,i)
proof
  let dl be Data-Location of R;
  dl in Data-Locations SCM by SCMRING2:1;
  then consider i being Nat such that
A1: dl = [1,i] by AMI_2:23,AMI_3:27;
  take i;
  thus thesis by A1,Th1;
end;
