Relative layout

In the 1.79.1 xsl stylesheets,
I see


(root)
   xsl   ;; then one of
   xsl-saxon
   xsl-libxslt
   xsl-xalan

Is this the only required layout please?
xsl-saxon for the saxon java extensions etc.

Is there any common practice for schema inclusion
in such a layout?
E.g.
(root)
   docbook.5.2b4
   docbook.5.1
   etc?

regards




-- 
Dave Pawson
XSLT XSL-FO FAQ.
Docbook FAQ.