@role. How high can it go?

I'm experimenting with typekit, typekit.com
and I want to add an @role attribute quite high in the xml tree,
to select a font for all the children?

Tried it on book, chapter, section and it doesn't come through as a @class
attribute? Works OK on para ... I have the params set correctly I believe;
<xsl:param name="html.stylesheet" select="'dpawson.css'"/>
<xsl:param name="css.decoration" select="0"/>
<xsl:param name="html.stylesheet.type">text/css</xsl:param>

http://www.docbook.org/tdg/en/html/book.html
@role is valid on <book...

Any suggestions please?



regards

-- 
Dave Pawson
XSLT XSL-FO FAQ.
http://www.dpawson.co.uk