> I have tried WordPerfect 9 with teixlite.dtd v1.3 and it compiled
> without problems... when I removed the NOTATIONs block. I guess
> there should be the obligatory SYSTEM identifiers - perhaps just ""?
In theory these should be required in all XML applications, but
not all parsers choke on their absence.
In a related problem I just posted to psgml-users, xml-mode
chokes if the Notation name is not uppercase (eg teixlite.dtd).
I posted a fix (two lines added to psgml-parse.el) which I
can make available if people want.