[...] we do want to use the datatracker. You can either use the bibxml3 endpoint it provides, or learn from its code and take the constituent data from the datatracker's API.
The bibxml3 endpoint matches URLs this way:
url(r'^bibxml3/%(name)s(?:-%(rev)s)?.xml$' % settings.URL_REGEXPS, views_doc.document_bibxml),
(though an upcoming release will likely escape the . before xml.)
so, yes, you want to be looking at names that look like https://datatracker.ietf.org/doc/bibxml3/draft-ietf-stir-passport-rcd-09.xml
Once you've generated something with a version, it won't change, but you will also need to be able to respond to version-less requests, such as:
https://datatracker.ietf.org/doc/bibxml3/draft-ietf-stir-passport-rcd.xml
