This list is (probably) incomplete.
text/paragraph
and flowing
text/plain
MIME types. The definitions for these
types are works in progress, published only as Internet
Drafts. See source comments for pointers to the most recent
drafts at the time of the release.
ietf:
URN scheme, also a
work in progress defined by an Internet Draft. See the source
for the appropriate pointer.
doi:
URN scheme, also
known as the Digital Object Identifier System.
This system was developed by CNRI for the
Association of American Publishers. The work CNRI did for AAP
was well received at the 1997 Frankfurt Book Fair, which led
to the inception of the International DOI Foundation.
file:
handler now reports the "last
modified" data for the file. This can actually be used if you
bookmarked a local file or seen in the "Document Info"
window.
See also the list of features in previous versions.