DOCBOOK-APPS: Rendering characters in inverse video

Hi,

I have done a (limited) search of the docbook-apps archive, and have not
found what I want.

I want to render one character, the chapter number, in inverse video on the
chapter title page that I have managed to generate ...

Does anyone know how to do this? What font or etc do I choose in my DSSSL
style sheets?

Regards
-------
Richard Sharpe, 
Samba (Team member, www.samba.org), Ethereal (Team member, www.ethereal.com)
Contributing author, SAMS Teach Yourself Samba in 24 Hours
Author, Special Edition, Using Samba