print QUERY "libname datasets '/home/viii';\n";          print QUERY "\n";          print QUERY "\%gdefault;\n";          print QUERY "\%g_port_d;\n";          print QUERY "\%g_land;\n";          print QUERY "\n";     print QUERY "\%clc_ctrl(working.temp1, value, /home/jk);\n"; .... print QUERY "\%pcs(working.temp1, value, &lsl, &usl, &unit, $pcs_title, PE-PSE, /home/jk/data.ps);\n";      } else {                print QUERY "\%pcsa(working.temp1, value, &lsl, &usl, &unit, $pcs_title, PE-PSE,/home/jk/data.ps);\n";      } can any one please explain what are %gdefault,%g_port_d,%g_land,%clc_ctrl,%pcs,%pcsa do .this is a piece of code written in perl script.Unable to find what does this commands do.is this userdefined variable or procedures or part of SAS functionality. Thanks in advance.Please reply asap. ... View more