DOCBOOK: nubering section titles

[Daniël Beukers <dabe@betronic.nl>]

Is it possible to have the DSSSL print stylesheet generate numbers for
setions? For example
...
<sect2>
  <title>FooBar</title>
  <para>....

would produce:

X.y.1 FooBar
....


(where X=chapter number and y=sect1 number)

Thanks in advance.
Daniel