App/stylesheet for generating slideshow from article ?

Dear All,

I have to write a tutorial for teaching an XML introduction (and would like to use docbook for that) and at the same time would like to generate slides.

Is there a convention for markup (extension) to create a slideshow (would SMIL http://www.w3.org/AudioVideo/ be a good choice ?) from DocBook-compliant text via a stylesheet transformation or a program/script ? Or would other approaches be more useful ?  

TIA & kind regards,

Holger Blasum, weigl !interService, http://www.weigl.de