.* Example by TenFiftyTwo(c).

.* The following pipeline collates the files generated by the pipelines:

.* Machine snapshot1.ppl and Machine snapshot2.ppl. The pipeline collates the

.* two files to determine if any files have been changed or deleted and which

.* files are new.

.* The pipeline illustrates the use of the Collate stage.

pipe (endchar ? comment //)

     // Read master input file.

     < &sysdrive:\Documents and Settings\&username\My Documents\snapshot1.txt

     | sort                       // COLLATE expects a sorted input.

     | c: collate                 // Find matches.

     | hole                       // Discard matching records.

     ?

     // Read detail input file.

     < &sysdrive:\Documents and Settings\&username\My Documents\snapshot2.txt

     | sort                       // COLLATE expects a sorted input.

     | c:                         // Define secondary streams for COLLATE.

     // Write missing files.

     | > &sysdrive:\Documents and Settings\&username\My Documents\missingfiles.txt

     ?

     c:                           // Define tertiary output for COLLATE.

     // Write new files.

     | > &sysdrive:\Documents and settings\&username\My Documents\newfiles.txt

     ?

     literal /Wait! Collating.../ // Console info message.

     | cons                       // Write it to the console.