[HTML4 Tables] cell width, column width

Hello,

this question refers to=20
<http://www.w3.org/TR/html4/struct/tables.html#h-11.2.6>

1. What does the width attribute on a TD refer to? Is it

- the center border edge width of the cell?
- the inner border edge width of the cell?
- the inner padding edge width of the cell?

Does it include half of the cell spacing, if specified? And if so, how =
are the corner cases first cell/last cell in a row handled?


2. Does the width attribute on COL/COLGROUP refer to the same =
measurement as the width attribute on TH/TD elements?


If you could point me to the place in the HTML 4.01 spec where this is =
defined, that would be greatly appreciated.

Regards
Christian