[whatwg] Web Forsm 2.0 possible omissions

[chris at bodar.com]

I've noticed two possible ommissions that seem to me to be essential to a useful 
Web Forms spec:

1) Input filtering (i.e. allow only numbers to be typed)
suggested implementation (like pattern takes a regexp but behaves as if  inside: ^
[ ]$
<input type="text" filter="\d">

2) Auto tabbing
for a 4 digit code:
<input type="text" filter="\d" autotab="4"/>

Regards
Christian