## An Online Demonstration

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)