DOCBOOK-APPS: Help - Reseting the chapter numbering

Hi,

I am using the latest DocBook XML distribution and the latest version Norm's
XSL stylesheets.
Apparently the chapter numbering is not being reset in a Part and I need
that.
I had a look at the stylesheets but could not spot the XSL construct that
would allow me to do that.
Can anybody help ?

Regards,

St廧hane Bline.