Re: PSGML broken?

[Eli Zaretskii]

> Date: Sat, 14 Jan 2023 20:12:48 +0100
> Cc: help-gnu-emacs@gnu.org
> From: Ulrich Deiters <ulrich.deiters@uni-koeln.de>
> 
> Am 14.01.23 um 12:43 schrieb Arash Esbati:
> > but maybe you have to go through the
> > customize options it provides and see where it looks for private DTD's.
> 
> Well, my XML documents contain a line that tells PSGML where to
> find the DTD, and this always worked until I recently updated Emacs.
> Unfortunately, the links to the PSGML documentation are broken …
> 
> One website states that "psgml" is a major mode of Emacs. But
> "M-x psgml-mode" does not work. "M-x sgml-mode" succeeds, but
> ignores the DTD …
> 
> As Emacs once worked (version 25.3.1), there must have a change
> occurred between that version and 27.2 . Is there a way to
> find out what happened?

Can you tell enough details for us to try to help you more efficiently?
Like (1) what was the PSGML version you had installed before, (2) what
exactly doesn't work -- show some file, tell how you try to use PSGML,
and what happens that shouldn't?  Also, are you sure "M-x sgml-mode"
invokes PSGML and not the sgml-mode that comes with Emacs?