Program keywords are unique to a program, and need to be looked up in the online manual page or by using the help= system keyword (dubbed the inline help). Parsing of ``values'' is usually done, though sometimes primitive. Program keywords also have the ability to read the value(s) of a keyword from a file through the keyword=@file construct. This is called the include keyword file, and is very handy for long keyword values, not having to escape shell characters etc.