where to include hard-pagebreak instruction?

[Paul Tremblay <paulhtremblay@gmail.com>]

Per Bob's book, I use the processing instruction <?hard-pagebreak?> in my documents to force page breaks, for example, before and after the glossary in my docbook with the root element as "article". However, including just <?hard-pagebreak?> by itself, (along with the correct FO code, of course), has no affect, because the stylesheets don't process processing instructions just under the root. If I do:

<para>
 <?hard-pagebreak?>
</para>

Then I get what I want, but then technically the resulting docbook is not valid. 

Any suggestions?

Paul