Editing CMS Pipelines (section)

==Overview==
''CMS Pipelines'' provides a CMS command, <code>PIPE</code>. The argument string to the <code>PIPE</code> command is the pipeline specification. PIPE selects programs to run and chains them together in a pipeline to pump data through.

Because CMS programs and utilities don't provide a device independent [[stdin]] and [[stdout]] interface, ''CMS Pipelines'' has a built-in  library of programs that can be called in a pipeline specification. These built-in programs interface to the operating system, and perform many utility functions.

Data on CMS is structured in logical records rather than a stream of bytes. For textual data a line of text corresponds to a logical record. In ''CMS Pipelines'' the data is passed between the stages as logical records.

''CMS Pipelines'' users issue pipeline commands from the terminal or in EXEC procedures. Users can write programs in [[REXX]] that can be used in addition to the built-in programs.