Source: email
Date:nnnn
Keywords: KEYWORD, KEYWORD
Descriptive text goes in simple P tags.
Examples go in p with the value "example" for the class attribute.
Use the "section" value for horizontal rules dividing into main sections: <hr class="section" />:
But use the "subsection" value for, well, subsections:
HTML tables can just go in a TABLE tag without attributes.
It would be good to put a "back to the top" link before the end of every main section, using a "top" class value: