--- a/master/painting.html	Fri Jan 18 12:37:14 2013 +1100
+++ b/master/painting.html	Fri Jan 18 13:35:06 2013 +1100
@@ -148,9 +148,12 @@
 
   <dt>context-fill</dt>
   <dt>context-stroke</dt>
-  <dd>The computed value of the <a>'fill'</a> or <a>'stroke'</a>
+  <dd>The same paint as the computed value of the <a>'fill'</a> or <a>'stroke'</a>
   property, respectively, of the <a>context element</a>.  If there
-  is no context element, then no paint is applied.</dd>
+  is no context element, then no paint is applied.  If the referenced paint
+  is a gradient or a pattern, then the coordinate space to use and the
+  object used for any <span class='attr-value'>'objectBoundingBox'</span>-relative
+  values are the same as those of the <a>context element</a>.</dd>
 </dl>
 </div>