anchor.diff:                name
                 onreset
                 onsubmit
  -	      target)
  -
  -(def-html-tag <:frame :core
  -              frameborder
  -              longdesc
  -              marginheight
  -              marginwidth
  -              noresize
  -              scrolling
  -              src)
  +              target)
  +
  +(def-empty-html-tag <:frame :core
  +                    frameborder
  +                    longdesc
  +                    marginheight
  +                    marginwidth
  +                    noresize
  +                    scrolling
  +                    src)
   
   (def-html-tag <:frameset :core
                 cols
  
positive.code:               onload
                onunload)
  
  (def-html-tag <:br :core)
  
  (def-html-tag <:button :core :event :i18n
                accesskey
  
negative.code: 
  (def-html-tag <:code :core :event :i18n)
  
  (def-empty-html-tag <:col :core :event :i18n
                      align
                      char
                      charoff
                      span
                      valign
                      width)
  
  (def-html-tag <:colgroup :core :event :i18n
                align
  