lispdoc - results for alphanumericp

(alphanumericp char)
Function: Given a character-object argument, ALPHANUMERICP returns T if the argument is either numeric or alphabetic.
Example:
(defun url-reserved-character-p (c)
  (not
   (or
    (member c
            '(#\- #\_ #\. #\! #\~ #\* #\' #\(
              #\)))
    (alphanumericp c))))
Mentioned in:
CLtL2 - 13. Characters
CLtL2 - 13.2. Predicates on Characters
HyperSpec - Function ALPHANUMERICP