setting blank pages

Hello everybody,

I'm setting some hard-pagebreaks in my DocBook-XML to create some 
pagebreaks and empty (blank) pages. It looks like this:
<?hard-pagebreak?>
<?hard-pagebreak?>

Between this two hard-pagebreaks is created a empty (blank) page, but 
the DocBook-XSL doesn't detect that this is a blank page. 

Is there any mechanismen to set a blank page? I can't find anything 
about this at the moment. I only can set some parameters in DocBook-XSL 
for handeling blank pages. But this parameters does not work on my 
created empty pages.

Best Regards,
K.