Including whitespace processing instruction in XSL out

Hi all,

I need to generate an XML file using XSLT that includes the following
as part of its output content:

<?whitespace-handling use-tags?>

this text needs to go before the root element in the XML doc.

I cannot figure out how to output this in the XSLT, I have tried
different ways but always get an error message that this is not
allowed where I need it.

my last option so far is to run the transformation and then open
the file and isert the line where I need it, but don't really want to
do that.... any ideas?

thanks

Sergio