--- a/master/definitions.xml	Wed Nov 20 13:25:49 2013 -0600
+++ b/master/definitions.xml	Fri Nov 22 13:39:44 2013 +0100
@@ -782,7 +782,7 @@
   <elementcategory name='structural' href='intro.html#TermStructuralElement' elements='defs, g, svg, symbol, use'/>
   <elementcategory name='text content' href='intro.html#TermTextContentElement' elements='text, tspan, tref, textPath, altGlyph'/>
   <elementcategory name='text content child' href='intro.html#TermTextContentChildElement' elements='tspan, tref, textPath, altGlyph'/>
-  <elementcategory name='structurally external' elements='script, image'/> <!-- possibly add later: iframe, video, audio, foreignObject(if it has xlink:href) -->
+  <elementcategory name='structurally external' elements='script, image, use'/> <!-- possibly add later: iframe, video, audio, foreignObject(if it has xlink:href) -->
 
   <!-- ... attributes common to multiple elements ........................ -->