#25 Non-valid documents are treated like valid ones

[Fabian Mandelbaum]

<para>
<indexterm>
<primary>defrag</primary>
</indexterm>
<indexterm>
<primary>comandos</primary>
<secondary>defrag</secondary>Para's content goes
here.</para>

The above piece of incorrect XML code (DocBook DTD) is
being taken as correct by PSGML (Running the C-c C-o
command says OK in Emacs' mini-buffer).

Using any command line XML parsing/checking tool gives
the correct "opening and closing tags mismatch" error
(an </indexterm> is missing before the para's content)

PSGML version: 1.2.5
Emacs version: 21.3
OS: Mandrake Linux 9.2