Format for converting to XSL-FO and HTML

[tjordah]

Hi!

Im looking for a developed XML format that hides the low-level details
of XSL-FO but that easily can be converted to nice-looking XSL-FO
documents as well as HTML through a set of (pre-developed)
XSLT-documents. I'm picturing a format where I can do something like
this (from http://www.w3schools.com/xslfo/xslfo_xslt.asp):

<header>
W3Schools
</header><paragraph>
At W3Schools you will find all the Web-building tutorials you
need, from basic HTML and XHTML to advanced XML, XSL, Multimedia
and WAP.
</paragraph>

Thanks,
Lars Moastuen (lm AT onedge dotdot no)