Keith is talking about formats for submission. For collaboration, there's a generation of collaborative tools from Google Docs to Dropbox and Microsoft tools that are a lot better than GitHub for collaboration.
I'd suggest, though, starting with a conservative rule: any Internet Draft may be SUBMITTED in any of the RFC OUTPUT formats: XML2RFC, plain text, simple HTML, PDF. ("simple HTML" needs definition but it isn't hard).
You can use whatever collaborative tool you want, though you might have to do a conversion, but that's true for Markdown and GitHub use. And every one of the collaborative document tools offer at least one of those formats.
--
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> -----Original Message-----
> From: ietf <ietf-bounces@xxxxxxxx> On Behalf Of Carsten Bormann
> Sent: Thursday, February 25, 2021 5:19 PM
> To: Keith Moore <moore@xxxxxxxxxxxxxxxxxxxx>
> Cc: ietf@xxxxxxxx
> Subject: Re: document writing/editing tools used by IETF
>
> On 25. Feb 2021, at 21:27, Keith Moore <moore@xxxxxxxxxxxxxxxxxxxx>
> wrote:
> >
> > I would like to make it be the case that anyone could submit a document
> written with their favorite word processor, and for that document to be
> converted to whatever format we want to use. I actually think this is
> feasible for document submission.
>
> This works if the draft is written by a single person.
> This approach does not lend itself to cooperative editing, for many reasons.
>
> Grüße, Carsten
