anchor.diff:   
   
   === Empty Map
  -No area-tag defined for map.
  +No area-tag defined for an imageMap. That's the equivalent to
  +having just the image - but why did we introduce the map-construct?
   
  -TODO: 
  +
  +[source,html]
  +.empty map 
  +----
  +<map name="empty">
  +
  +</map>
  +----
  +
   
   === Broken Link in ImageMap
   A link (href) within an area-tag is broken
  
positive.code: 	<area shape=rect coords="0,10,0,10" href="#sample2">
  </map>
  ++++
  
  [source,html]
  .duplicate map name 
  
negative.code: === Ambigous Map-Name
  A map-name exists more than once.
  
  ////
  TODO: create an image for this case
  ////
  
  ++++
  <img src=".images/imageMap_1.jpg" alt="jpg1" usemap="#dupe">
  <map name="dupe">
  