lispdoc - results for char-downcase

(char-downcase char)
Function: Return CHAR converted to lower-case if that is possible.
Example:
(defun iso-lc (char)
  "Returns lower case CHAR."
  (char-downcase char))
Mentioned in:
CLtL2 - 13. Characters
CLtL2 - 13.2. Predicates on Characters
CLtL2 - 13.4. Character Conversions
CLtL2 - 18.3. String Construction and Manipulation
HyperSpec - Function CHAR-UPCASE, CHAR-DOWNCASE
(char-code char)
Function: Return the integer code of CHAR.
Example:
(defun char-el? (el)
  (let ((char-code (char-code el)))
    (and (>= char-code 0) (<= char-code 127))))
Mentioned in:
CLtL2 - 13.1 Character Attributes
CLtL2 - 13.3. Character Construction and Selection
CLtL2 - 13.4. Character Conversions
CLtL2 - 4.8. Type Conversion Function
HyperSpec - Function CHAR-CODE
PCL - implementing shoutcast
PCL - primitive binary types
PCL - string types
PCL - strings in binary files
(char-equal character &rest more-characters)
Function: Return T if all of the arguments are the same character. Case is ignored.
 Mentioned in:
CLtL2 - 13. Characters
CLtL2 - 13.2. Predicates on Characters
CLtL2 - 18.2. String Comparison
CLtL2 - 6.3. Equality Predicates
HyperSpec - Function CHAR=, CHAR/=, CHAR<, CHAR>, CHAR<=, CHAR>=, CHAR-EQUAL, CHAR-NOT-EQUAL, CHAR-LESSP, CHAR-GREATERP, CHAR-NOT-GREATERP, CHAR-NOT-LESSP
PCL - character comparisons
Successful Lisp - chapter17