ietf-nntp draft-ietf-nntpext-base-19

[Clive D.W. Feather]

Russ Allbery said:
>> There exists the possibility (shudder) that other variants of the MODE
>> command might exist in the future, in which case the principles you set
>> out below would apply pretty much as you have written them. Should it
>> all be written in a more general form to cover that possibility?
> Given that the MODE command is in essence a primitive extension mechanism
> which is probably superseded by LIST EXTENSIONS, I hope that we'll be able
> to get away without using it any more.  So I wouldn't bother making the
> text general unless the issue actually arises, since hopefully it won't.

While I agree with that, the text in the paragraph beginning "At all
points" is actually generic to any command that changes what's available.
As such, it perhaps belongs with LIST EXTENSIONS rather than MODE READER.
That is, I would delete it and give LIST EXTENSIONS wording the text:

    At all points in the session those commands currently listed by
    LIST EXTENSIONS must be available. Therefore, if a command defined
    by an extension (including those in Section 8) is only available
    before or after a particular command (such as MODE READER), or if
    the effects of the extension will be changed by the command, the
    LIST EXTENSIONS command MUST produce different results that indicate
    the differences.

Any objections?

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