$Stdin / $Stdinx
A system-defined file name referring to the standard input “file” (which can be an actual file or a device). $Stdin usually refers to the keyboard for interactive sessions and an input spool file for batch jobs. $Stdin treats a line starting with a colon as end-of-file. $Stdinx treats the colon (:) prompt appearing in the first column of input data as part of the data file, rather than as an end-of-file indicator. Qedit reads from $stdinx so that MPE commands entered with a colon do not cause Qedit to terminate.