navigator

Hypertext links in HTML (draft)

      NAVIGATOR
         The NAVIGATOR relationship identifies a navigational aid.

         When REL=NAVIGATOR, the target document is a navigational aid.
         A navigational aid may consist of a whole or partial Table of
         Contents, a list of related documents, an indication of the
         current document's location within a document hierarchy, or
         any other information which may be useful to the user.

         When REV=NAVIGATOR, the current document is a navigational aid.

         If the hypertext link is specified with REL in a LINK element,
         an HTML user agent may present an icon in a tool bar.

[引用： 4.4b. Browser-defined Links -- Hypertext links in HTML (draft) より]