link

      Relationship values can be used in principle:

      a) for document specific toolbars/menus when used
         with the link element in document head e.g.
           start, contents, previous, next, index, end, help
      b) to link to a separate style sheet (rel="stylesheet")
      c) to make a link to a script (rel="script")
      d) by stylesheets to control how collections of
         html nodes are rendered into printed documents
      e) to make a link to a printable version of this document
         e.g. a PostScript or PDF version (rel="alternate" media="print")