[texhax] Obsolete \centerline command used in amsbook class (Uwe L?ck)

[William F Hammond]

Barbara Beeton <bnb at ams.org> writes:

> On Thu, 27 Sep 2012, William F Hammond wrote:

> . . .
>     Toward this end one will get better results by specifying
>     what is permitted rather than what is forbidden.
>
> we really do try to do that, though not
> always successfully.  but have you any
> suggestions on how to deal with those
> persons who absolutely refuse to read the
> guidelines provided?

Yes.  So as not to discard legacy usage, introduce,
as an optional substitute for \documentclass

   \documenttype[specific-rule-set]{whatever}

Each "whatever" would have a default "specific-rule-set".

In this mode the processor enforces the rules, and there
should be no user-perceived ambiguity about whether error
messages come from the LaTeX kernel or the underlying
engine.  In fact, the first round of parsing need not be
done under a TeX engine.

                              -- Bill