Docutils XML namespace?

Hi Engelbert,

I know docutils has a DTD for its XML. Does it have an official XML 
namespace?

Context: I'm working with a tool that parses reST files into XML for use 
in XML workflow. With all-XML workflow it's convenient to use a 
dedicated namespace for reST, especially if it's reST with custom 
extensions that may provide their own namespace. (E.g. one of such 
extensions is going to be a generic '.. object:: XML' that embeds 
literal foreign XML into reST.) I handle the conversion to XML myself 
and right now I use a private namespace for reST elements. As I'm about 
to publish the tool I wonder if there's an official reST namespace I 
should be using instead. The tool is in its infancy and I can always 
change things later, so it's not urgent.

Kind regards,
Mikhail