1. I vote in favour of the proposed <C> (former <MARK>) tag.
2. Allow <T> and <BT> tags in ordinary text too (for example, inside
<EM>...</EM>, as in
Important: <EM>use an <T>upright</T> font here!</EM>
3. Allow WIDTH and ALIGN attributes for the HR element.
4. Introduce level 0 headings for the title of the whole document.
Motivations and further comments follow in another message.
Thank you for your attention.
Gustavo MEZZETTI
Universita` degli Studi di Padova -- Italy
e-mail: mezzetti@pdmat1.math.unipd.it