theorem Th27:
  Data-Locations SCM = SCM-Data-Loc
proof
  SCM-Data-Loc misses {NAT} by AMI_2:20,ZFMISC_1:50;
  then
A1: SCM-Data-Loc misses {NAT};
  thus Data-Locations SCM = {NAT} \/ SCM-Data-Loc \ ({NAT}) by AMI_2:22
,SUBSET_1:def 8
    .= SCM-Data-Loc \/ ({NAT}) \ ({NAT})
    .= SCM-Data-Loc \ ({NAT}) by XBOOLE_1:40
    .= SCM-Data-Loc by A1,XBOOLE_1:83;
end;
