Major Section: PROGRAMMING
(Keywordp x) is true if and only if x is a keyword, i.e., a
symbol in the "KEYWORD" package. Such symbols are typically
printed using a colon (:) followed by the symbol-name of the
symbol.
Keywordp has a guard of t.
Keywordp is a Common Lisp function. See any Common Lisp
documentation for more information.