On Sunday, March 23, 2014, phryk <phryk@phryk.net> wrote:
Hey there,

I'm currently writing the software for my next website which I want
to properly integrate restructured text.

        My site is using HTML5, but I'm currently using the html4css1
        writer. How do I implement my own one? Can I subclass from the
        html4 one and just override anything that differs?

Did you looked at https://github.com/michaelbeaumont/docutils-html5css3 ? It is an html5/css3 writer. 
 
Regards,
Ben