DTD graphic tool?

[Art Campbell]

Has anyone run across a tool that can represent, graphically, the
nesting of levels of elements and sub-elements within a DTD file?  It
doesn't need to provide editing capability, although that would be
nice -- I'm looking more for a nice graphic.

Thanks,
Art

-- 
Art Campbell                                             art.campbell at gmail.com
  "... In my opinion, there's nothing in this world beats a '52 Vincent
               and a redheaded girl." -- Richard Thompson
                             No disclaimers apply.
                                     DoD 358