<INS> and <DEL> are pretty close. <INS> is for newly inserted information and
<DEL> is for recently obsoleted (e.g. deleted) information.
Just to throw in my two cents, I think Ping is being premature to call for the
removal of these and some other tags. I can see how ACRONYM would be useful,
since a browser might render it all in caps in a reduced height font, as
acronyms are oftened rendered in printed media. Some of the others might have
some usefulness too, and the worst that can happen is they will be ignored.
These tags might be useful for search engines too, if someone wanted to search
for all the acronyms or authors or what have you in a search space.
Let's not remove those phrase-markup tags just yet.
Relay Technology, Inc.