RE: [css-tables] repeating table headers and footers

> > We'll test this and spec the most interoperable behavior, and if there
is
> none we'll spec the most sane behavior that is currently being shipped by
a
> UA (to ease on web compat).
> 
> I believe you'll find that repeating the table headers/footers across
> fragmentainers is not universally interoperable, but is the most commonly
> implemented behavior (especially if you take pagination-focused UAs into
> account as well) and the sanest / most useful.
> 
> If you come to a different conclusion, we'll have something to talk about.
> 
>  - Florian

>From what I have seen, browsers do not repeat headers/footers in
multi-columns. 
http://codepen.io/FremyCompany/pen/YwbOMM

I added some placeholder in the spec, feel free to provide alternatives:
https://drafts.csswg.org/css-tables-3/#fragmentation