[whatwg] Commit-Watchers Digest, Vol 11, Issue 26

[Christoph Päper]

> +  <h4>Attributes common to <code>td</code> and <code>th</code>  
> elements</h4>
>
> +  <p>The <code>td</code> and <code>th</code> elements may have a <dfn
> +  title="attr-tdth-colspan"><code>colspan</code></dfn> content
> +  attribute specified, whose value must be a <span>valid non-negative
> +  integer</span> greater than zero.

Isn't that the description of a valid positive integer? If that term  
is not used or defined yet, why not?

> +  <p>The <code>td</code> and <code>th</code> elements may also have a
> +  <dfn title="attr-tdth-rowspan"><code>rowspan</code></dfn> content
> +  attribute specified, whose value must be a <span>valid non-negative
> +  integer</span>.

Why can |rowspan|, unlike |colspan|, be 0, but is then also  
normalised to 1?