At 11:08 AM -0500 12/05/00, SiKing wrote:
>Assuming that my client can understand all of these, what does the
>"Supersedes" mean to it? I already know the other two. What does it
>do
>with this information? Does it expire the message specified?
As Denis McKeon already pointed out, it's the news server rather than
the client that handles it. Also, it is intended to cancel the article,
not expire it. But in practice it has almost no effect. "Supersedes" is
subject the the same abuses as "cancel" and thus is now mostly ignored.
It will not be useful until we have a way of signing articles and
cancels -- and since the focus of the net has moved away from Usenet,
that isn't likely to happen soon.
>Also, I do know that it is supposed to be mispelled as "Supercedes:"
>...
>I remember reading someplace that the person who wrote the spec on this
>screwed up, but now it is in the spec ...
I don't know what you heard, but you heard wrong. It's spelled
"Supersedes" in the dictionary, in RFC1036 (which is the spec), and in
every successful superseding message posted to Usenet. It's derived
from the Latin "super" (above) and "sedere" (sit).
You can put a Supercedes: header in your message if you want. It will
be handled exactly like every other unrecognized header: ignored. Well,
almost. On 20 Feb 1994, I posted my FAQ with a "Supercedes" header.
Three days later, I got email from Jonathan Kamens pointing out the
error. If that email was automatically generated, then the same monitor
might still be running and you might still get such an email for using
a "Supercedes" header in *.answers.
Edward Reid
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