Multi-level content-types

All,

For the record .. I am happy with two-level content-types after
seeing responses to my note of the other day.  I am certain that
the hyphenated type names (e.g. Davids-Widgets-Inc-xxx) will
work out as well as cmu-cs-a.arpa type hostnames worked over
the long run.  It remains to be seen if the number of content-type's
will grow to the same extent as Internet hostnames has.  And
even if it does we can easily extend the syntax with more
levels of /'s.

        David