built-in shelf
Identifies the default output destination provided to OmniMark by the system.
In earlier releases of OmniMark, #process-output was called #console, and this keyword can still be used to perform the same function. The use of #console is deprecated.
The "declare #process-output has" declarations can be used to change some of the characteristics of the #process-output stream. Note that #process-output never allows referents, so to declare that this stream has referents-allowed or referents-not-allowed is an error.