doc string for face-attribute-relative-p doesn't help

[Drew Adams]

emacs -Q
C-h f face-attribute-relative-p

  Return non-nil if face ATTRIBUTE VALUE is relative.

What does that mean? How is ATTRIBUTE VALUE a face? This is
incomprehensible to me.


In GNU Emacs 22.0.50.1 (i386-mingw-nt5.1.2600)
 of 2006-03-20 on W2ONE
X server distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Id:/g/include'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  encoded-kbd-mode: t
  tooltip-mode: t
  auto-compression-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  line-number-mode: t

Recent input:
<down-mouse-1> <mouse-1> C-h f f a c e - f o r e <tab> 
<return> C-x 0 <help-echo> <down-mouse-2> <mouse-2> 
C-x 1 <wheel-down> <double-wheel-down> <triple-wheel-down> 
<wheel-up> <down-mouse-1> <mouse-1> C-h f <return> 
C-x 1 <down-mouse-1> <mouse-1> <mouse-1> <mouse-1> 
<mouse-1> <mouse-1> C-h f <return> C-x 1 C-h f <return> 
C-x 0 <help-echo> <down-mouse-2> <mouse-2> <help-echo> 
<down-mouse-1> <mouse-2> C-x 1 <wheel-down> <double-wheel-down> 
<wheel-down> <double-wheel-down> <wheel-up> <down-mouse-1> 
<mouse-1> C-h f <return> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <menu-bar> <help-menu> <report-emacs-b
ug>

Recent messages:
Loading dired...
Loading regexp-opt...done
Loading dired...done
Loading help-fns...done
Type C-x 1 to remove help window.  
Loading vc-cvs...done
Type C-x 1 to remove help window.   [3 times]
help-follow-mouse: No cross-reference here
Type C-x 1 to remove help window.  
Loading emacsbug...done