can be found in that file, and exist, with default code 1 or a given code.</p></dd></dl><dl><dt class="spec value" id="val-pipeline"><a href="#val-pipeline" class="anchor"></a><code><span class="keyword">val</span> pipeline : <span>producer_prog:string</span> <span>&#45;&gt;</span> <span>producer_args:<span>string list</span></span> <span>&#45;&gt;</span> <span>consumer_prog:string</span> <span>&#45;&gt;</span> <span>consumer_args:<span>string list</span></span> <span>&#45;&gt;</span> <a href="../IStdlib/in