support for <sup>/<sub> (was: Re: [this] as a synonym for [this][])

[Matthias Steffens]

On 03-Apr-2005 at 12:55 -0400 John Gruber wrote:

> On the other hand, I am tempted to add support for `<sup>`, and
> possibly `<sub>`. Not for writing mathematics -- Markdown is never
> going to be suitable for marking up equations, and it would be a
> mistake to pretend it could be -- but for very simple usage, such
> as footnotes.

It would be *very* useful for marking up scientific references or
citations where `<sup>` and `<sub>` is used in almost every abstract
and in many article titles (especially in biology/chemistry).

Background: I would love to adopt Markdown as the main markup syntax
for the bibliographic web database I am developing [1] but I've been
hesitant to do so because of the lack of `<sup>` and `<sub>` which is
essential for markup of bibliographic information.

[1]: http://www.refbase.net

Matthias