An Online Demonstration

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Note that the source after a <COMMENT>(HTML/POPUP=...) directive is still SDML. The text following the /POPUP= is the description of the link. This popup was produced using:
  <COMMENT>(HTML/POPUP=An Online Demonstration)
  <COMMENT>(HTML=
  Note that the source after a <TT><COMMENT>(HTML/POPUP=...)</TT> 
  directive is still SDML.  The text following the <TT>/POPUP=</TT> is the 
  description of the link.  This popup was produced using: 

  <PRE>
    (This is bit like Russian Dolls, so I'll quit here!)
  </PRE>
  )
  <COMMENT>(HTML/ENDPOPUP)