<!ELEMENT extendedElement ANY>
<!ATTLIST extendedElement
  xlink:type     (simple)              #FIXED "simple"
  xlink:role     NMTOKEN               #IMPLIED
  xlink:title    CDATA                 #IMPLIED
  xlink:show    (new
                |replace
                |embed
                |undefined)          #IMPLIED
  xlink:actuate (onLoad
                |onRequest
                |undefined)          #IMPLIED >